Menu

Change Region

Change Region

Weld

Map

Explore...

Bird List

Updated ~2 days ago
395 All Years 239 This Year 2024 203 This Month May 2024
Last Observed First Observed High Count

Custom Time Period

Change Time Period

Sort by

  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (394)

  1. American Dipper Cinclus mexicanus
    # Count: 1
    Date:
    Observer: Garrison Doctor
    Location: Hangar
  2. Sharp-tailed Sandpiper Calidris acuminata
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Stewart's Pond
  3. Slaty-backed Gull Larus schistisagus
    # Count: 1
    Date:
    Observer: Ruben Stoll
    Location: Black Hollow Reservoir
  4. Canyon Towhee Melozone fusca
    # Count: 1
    Date:
    Observer: Karen Taylor
    Location: 117 Hays Avenue, Johnstown, Colorado, US (40.333, -104.917)
  5. Brown-capped Rosy-Finch Leucosticte australis
    # Count: 1
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: 18096–18098 County Road 128, Carr US-CO 40.91359, -104.71492
  6. Pinyon Jay Gymnorhinus cyanocephalus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Baxter Lake
  7. Pine Grosbeak Pinicola enucleator
    # Count: 1
    Date:
    Observer: shawn mason
    Location: Poudre Ponds
  8. Barnacle Goose Branta leucopsis
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Milavec Lake, Frederick US-CO (40.1214,-104.9461)
  9. Pink-footed Goose Anser brachyrhynchus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Idaho Creek Open Space
  10. LeConte's Sparrow Ammospiza leconteii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Stewart's Pond
  11. Pygmy Nuthatch Sitta pygmaea
    # Count: 1
    Date:
    Observer: Gene Rutherford
    Location: US-Colorado-Raymer-65858 County Road 116 - 40.832x-103.803
  12. Blue-winged Warbler Vermivora cyanoptera
    # Count: 1
    Date:
    Observer: Gene Rutherford
    Location: Pawnee NG--Norma's Grove
  13. Crested Caracara Caracara plancus
    # Count: 1
    Date:
    Observer: shawn mason
    Location: Poudre River Trail, Sheep Draw east of N. 71st Ave
  14. Greater Roadrunner Geococcyx californianus
    # Count: 1
    Date:
    Observer: James Eley
    Location: Stewart's Pond
  15. Baird's Sparrow Centronyx bairdii
    # Count: 2
    Date:
    Observer: Walter Wehtje
    Location: Meadow Springs Ranch (restricted access)
  16. Bewick's Wren Thryomanes bewickii
    # Count: 1
    Date:
    Observer: Norm Lewis
    Location: Roggen area: WCR's 16/77
  17. Black Rosy-Finch Leucosticte atrata
    # Count: 1
    Date:
    Observer: Lori Zabel
    Location: Sandstone Ranch
  18. Lucy's Warbler Leiothlypis luciae
    # Count: X
    Date:
    Observer: Josh Bruening
    Location: Eaton Cemetery
  19. American Goshawk Accipiter atricapillus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Goshawk Crossing
  20. Purple Finch Haemorhous purpureus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Glenmere Park
  21. Yellow-bellied Sapsucker Sphyrapicus varius
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  22. Black-throated Sparrow Amphispiza bilineata
    # Count: 1
    Date:
    Observer: J.R. Rigby
    Location: Pawnee NG--Central Plains Experimental Range
  23. Canyon Wren Catherpes mexicanus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  24. Painted Redstart Myioborus pictus
    # Count: 1
    Date:
    Observer: Cathy Sheeter
    Location: Pawnee NG--Crow Valley CG
  25. Steller's Jay Cyanocitta stelleri
    # Count: 1
    Date:
    Observer: Chris Rurik
    Location: Just Beyond Grover on 390
  26. Tufted Duck Aythya fuligula
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  27. Sharp-tailed Grouse Tympanuchus phasianellus
    # Count: 5
    Date:
    Observer: Mackenzie Goldthwait
    Location: WCR 115
  28. Mexican Duck Anas diazi
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  29. Sprague's Pipit Anthus spragueii
    # Count: 1
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Experimental Range
  30. Connecticut Warbler Oporornis agilis
    # Count: 1
    Date:
    Observer: Loch Kilpatrick
    Location: Pawnee NG--Crow Valley CG
  31. Band-tailed Pigeon Patagioenas fasciata
    # Count: 1
    Date:
    Observer: Frank and Nancy Hatch
    Location: Lower Latham
  32. Yellow-throated Warbler Setophaga dominica
    # Count: 1
    Date:
    Observer: Vincent F. Nichnadowicz
    Location: Pawnee NG--Crow Valley CG
  33. Glaucous-winged Gull Larus glaucescens
    # Count: 1
    Date:
    Observer: Carol Sullivan
    Location: Black Hollow Reservoir
  34. Black Swift Cypseloides niger
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Union Reservoir
  35. Grace's Warbler Setophaga graciae
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Pawnee NG--Crow Valley CG
  36. Cassin's Finch Haemorhous cassinii
    # Count: 2
    Date:
    Observer: Glenn Walbek
    Location: Pawnee NG--Crow Valley CG
  37. Purple Martin Progne subis
    # Count: 1
    Date:
    Observer: Peter Weber 🦉
    Location: Pawnee NG--Pawnee Buttes and area
  38. Black Scoter Melanitta americana
    # Count: 1
    Date:
    Observer: Jonelle Balais
    Location: Union Reservoir
  39. Black Phoebe Sayornis nigricans
    # Count: 1
    Date:
    Observer: C. Lawton
    Location: Poudre River
  40. Carolina Wren Thryothorus ludovicianus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  41. Least Tern Sternula antillarum
    # Count: 1
    Date:
    Observer: Glenn Walbek
    Location: Lower Latham Reservoir area
  42. Black-billed Cuckoo Coccyzus erythropthalmus
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Pawnee NG--Crow Valley CG
  43. Western Bluebird Sialia mexicana
    # Count: 1
    Date:
    Observer: Carol Sullivan
    Location: Black Hollow Reservoir
  44. Bohemian Waxwing Bombycilla garrulus
    # Count: 8
    Date:
    Observer: Gail Keirn
    Location: Pawnee NG--Crow Valley CG
  45. Eastern Towhee Pipilo erythrophthalmus
    # Count: 1
    Date:
    Observer: donald beltz
    Location: crow valley CG
  46. Blue-headed Vireo Vireo solitarius
    # Count: 1
    Date:
    Observer: William Kaempfer
    Location: Pawnee NG--Crow Valley CG
  47. Black-chinned Hummingbird Archilochus alexandri
    # Count: X
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Greeley-Norma Erickson's
  48. Rusty Blackbird Euphagus carolinus
    # Count: 1
    Date:
    Observer: Chris Wood
    Location: Union Reservoir
  49. Mississippi Kite Ictinia mississippiensis
    # Count: X
    Date:
    Observer: Bryan Guarente
    Location: Greeley
  50. Woodhouse's Scrub-Jay Aphelocoma woodhouseii
    # Count: X
    Date:
    Observer: Bryan Guarente
    Location: Greeley
  51. Buff-breasted Sandpiper Calidris subruficollis
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Milton Reservoir (restricted access)
  52. Prairie Warbler Setophaga discolor
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  53. Red Phalarope Phalaropus fulicarius
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Milton Reservoir (restricted access)
  54. Calliope Hummingbird Selasphorus calliope
    # Count: 1
    Date:
    Observer: Chris Wood
    Location: Greeley---Norma Erickson's
  55. Summer Tanager Piranga rubra
    # Count: X
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Pawnee NG--Crow Valley CG
  56. Northern Cardinal Cardinalis cardinalis
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  57. Common Gallinule Gallinula galeata
    # Count: 1
    Date:
    Observer: Loch Kilpatrick
    Location: St. Vrain SP
  58. Curve-billed Thrasher Toxostoma curvirostre
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Windsor
  59. Varied Thrush Ixoreus naevius
    # Count: 1
    Date:
    Observer: Carol Sullivan
    Location: Pawnee NG--Crow Valley CG
  60. Fox Sparrow Passerella iliaca
    # Count: X
    Date:
    Observer: Bryan Guarente
    Location: Pawnee Grasslands
  61. Eastern Wood-Pewee Contopus virens
    # Count: X
    Date:
    Observer: Bryan Guarente
    Location: Pawnee NG--Crow Valley CG
  62. Alder Flycatcher Empidonax alnorum
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Fort Lupton
  63. Costa's Hummingbird Calypte costae
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  64. Caspian Tern Hydroprogne caspia
    # Count: X
    Date:
    Observer: Bryan Guarente
    Location: Lower Latham Reservoir area
  65. Red Crossbill Loxia curvirostra
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Pawnee Grasslands--Stanley Ranch
  66. Black-throated Gray Warbler Setophaga nigrescens
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  67. Wood Thrush Hylocichla mustelina
    # Count: 1
    Date:
    Observer: Loch Kilpatrick
    Location: Pawnee NG--Crow Valley CG
  68. Scarlet Tanager Piranga olivacea
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Pawnee NG--Crow Valley CG
  69. Bell's Vireo Vireo bellii
    # Count: X
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Pawnee NG--Crow Valley CG
  70. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: John Collins
    Location: Lower Latham Reservoir area
  71. Northern Saw-whet Owl Aegolius acadicus
    # Count: 1
    Date:
    Observer: David Ely
    Location: Pawnee NG--Crow Valley CG
  72. Golden-crowned Sparrow Zonotrichia atricapilla
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  73. Winter Wren Troglodytes hiemalis
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  74. Scissor-tailed Flycatcher Tyrannus forficatus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Briggsdale
  75. Sagebrush Sparrow Artemisiospiza nevadensis
    # Count: 1
    Date:
    Observer: Martha Beebe
    Location: Pawnee NG--Pawnee Buttes and area
  76. Baltimore Oriole Icterus galbula
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Pawnee Grasslands--Stanley Ranch
  77. Gray Flycatcher Empidonax wrightii
    # Count: 1
    Date:
    Observer: Paul Sweet
    Location: Pawnee NG--Crow Valley CG
  78. Prothonotary Warbler Protonotaria citrea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  79. Lesser Black-backed Gull Larus fuscus
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Union Reservoir
  80. Sabine's Gull Xema sabini
    # Count: 1
    Date:
    Observer: David Ely
    Location: Windsor Reservoir
  81. Ash-throated Flycatcher Myiarchus cinerascens
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  82. Great Crested Flycatcher Myiarchus crinitus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  83. Lesser Goldfinch Spinus psaltria
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  84. Magnolia Warbler Setophaga magnolia
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  85. Rufous Hummingbird Selasphorus rufus
    # Count: X
    Date:
    Observer: Gary Bowman
    Location: Pawnee National Grasslands
  86. Bushtit Psaltriparus minimus
    # Count: 2
    Date:
    Observer: Marquis Lachance
    Location: Lower Latham Reservoir area
  87. Bobolink Dolichonyx oryzivorus
    # Count: X
    Date:
    Observer: John Vanderpoel
    Location: CR 44 1/2
  88. Broad-winged Hawk Buteo platypterus
    # Count: 1
    Date:
    Observer: David Ely
    Location: Pawnee NG--Crow Valley CG
  89. Dunlin Calidris alpina
    # Count: 1
    Date:
    Observer: David Ely
    Location: Windsor Lake
  90. Nashville Warbler Leiothlypis ruficapilla
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  91. Cassin's Vireo Vireo cassinii
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Milton Reservoir (restricted access)
  92. Field Sparrow Spizella pusilla
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  93. Rose-breasted Grosbeak Pheucticus ludovicianus
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  94. Hooded Warbler Setophaga citrina
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Riverside Reservoir (restricted access)
  95. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: David Ely
    Location: Windsor Lake
  96. Great Black-backed Gull Larus marinus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  97. Cackling Goose Branta hutchinsii
    # Count: X
    Date:
    Observer: David Ely
    Location: Woods Lake
  98. White-winged Scoter Melanitta deglandi
    # Count: 2
    Date:
    Observer: David Ely
    Location: Union Reservoir
  99. Neotropic Cormorant Nannopterum brasilianum
    # Count: 1
    Date:
    Observer: William Kaempfer
    Location: Ireland Reservoir #5
  100. Mourning Warbler Geothlypis philadelphia
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  101. Ovenbird Seiurus aurocapilla
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  102. Indigo Bunting Passerina cyanea
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  103. Surf Scoter Melanitta perspicillata
    # Count: 1
    Date:
    Observer: David Ely
    Location: Pawnee NG--Adams and Bunker Reservoirs
  104. Long-tailed Duck Clangula hyemalis
    # Count: 1
    Date:
    Observer: Thomas Kihn
    Location: Greeley
  105. Greater Scaup Aythya marila
    # Count: 1
    Date:
    Observer: David Ely
    Location: Poudre Ponds
  106. American Golden-Plover Pluvialis dominica
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Union Reservoir
  107. Ruddy Turnstone Arenaria interpres
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  108. White-throated Swift Aeronautes saxatalis
    # Count: 1
    Date:
    Observer: Bill Pulliam
    Location: Pawnee NG--Pawnee Buttes and area
  109. Veery Catharus fuscescens
    # Count: 2
    Date:
    Observer: David Ely
    Location: Pawnee NG--Crow Valley CG
  110. Worm-eating Warbler Helmitheros vermivorum
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  111. Golden-winged Warbler Vermivora chrysoptera
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  112. Tennessee Warbler Leiothlypis peregrina
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  113. Northern Waterthrush Parkesia noveboracensis
    # Count: 1
    Date:
    Observer: Joseph Gebler
    Location: Banner Lakes SWA (closed April 1 - July 15)
  114. Eurasian Wigeon Mareca penelope
    # Count: 1
    Date:
    Observer: Doug Ward
    Location: Lower Latham Reservoir area
  115. Red-shouldered Hawk Buteo lineatus
    # Count: 2
    Date:
    Observer: John Vanderpoel
    Location: Ireland Reservoir #5
  116. Glaucous Gull Larus hyperboreus
    # Count: 1
    Date:
    Observer: Michael Britten
    Location: Union Reservoir
  117. Swamp Sparrow Melospiza georgiana
    # Count: 1
    Date:
    Observer: Grant Canterbury
    Location: Greeley
  118. Red-necked Grebe Podiceps grisegena
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  119. Red-naped Sapsucker Sphyrapicus nuchalis
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  120. Hammond's Flycatcher Empidonax hammondii
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  121. Yellow-crowned Night Heron Nyctanassa violacea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Lower Latham Reservoir area
  122. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 1
    Date:
    Observer: John Esperance
    Location: Pawnee National Grassland, CO.
  123. Chestnut-sided Warbler Setophaga pensylvanica
    # Count: 1
    Date:
    Observer: Brandon K. Percival
    Location: Pawnee NG--Crow Valley CG
  124. Palm Warbler Setophaga palmarum
    # Count: 1
    Date:
    Observer: Brandon K. Percival
    Location: Pawnee NG--Crow Valley CG
  125. White-eyed Vireo Vireo griseus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Riverside Reservoir (restricted access)
  126. Olive-sided Flycatcher Contopus cooperi
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  127. White-throated Sparrow Zonotrichia albicollis
    # Count: 1
    Date:
    Observer: Steve Stachowiak
    Location: Pawnee NG--Crow Valley CG
  128. Kentucky Warbler Geothlypis formosa
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  129. Red-bellied Woodpecker Melanerpes carolinus
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Briggsdale Cemetery
  130. Ross's Goose Anser rossii
    # Count: 4
    Date:
    Observer: Alex Cruz Jr 🦤
    Location: Poudre Ponds
  131. Greater White-fronted Goose Anser albifrons
    # Count: 1
    Date:
    Observer: Alex Cruz Jr 🦤
    Location: Poudre Ponds
  132. Hooded Merganser Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Alex Cruz Jr 🦤
    Location: Poudre Ponds
  133. Brant Branta bernicla
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Greeley
  134. Yellow-billed Loon Gavia adamsii
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  135. Dusky Flycatcher Empidonax oberholseri
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  136. Black-and-white Warbler Mniotilta varia
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Pawnee NG--Crow Valley CG
  137. Brown Pelican Pelecanus occidentalis
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  138. Yellow-breasted Chat Icteria virens
    # Count: 1
    Date:
    Observer: Karl Overman
    Location: Pawnee NG--Crow Valley CG
  139. Northern Parula Setophaga americana
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Pawnee NG--Crow Valley CG
  140. Least Bittern Ixobrychus exilis
    # Count: 1
    Date:
    Observer: Don Henise
    Location: Lower Latham Reservoir area
  141. Wild Turkey Meleagris gallopavo
    # Count: 3
    Date:
    Observer: David Hayes
    Location: Pawnee NG--Pawnee Buttes and area
  142. Black-headed Gull Chroicocephalus ridibundus
    # Count: 1
    Date:
    Observer: William Kaempfer
    Location: Union Reservoir
  143. Common Redpoll Acanthis flammea
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Pawnee NG (Please use more-specific locations)
  144. Cedar Waxwing Bombycilla cedrorum
    # Count: 3
    Date:
    Observer: Dieter Kamm
    Location: Pawnee NG--Pawnee Buttes and area
  145. Trumpeter Swan Cygnus buccinator
    # Count: 1
    Date:
    Observer: Jeff Buecking
    Location: LUNA Reservoir
  146. Eastern Meadowlark Sturnella magna
    # Count: 1
    Date:
    Observer: Todd Myers
    Location: Weld County Rds 39 x 38
  147. Broad-tailed Hummingbird Selasphorus platycercus
    # Count: X
    Date:
    Observer: Ron Wagner
    Location: Union Reservoir
  148. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: X
    Date:
    Observer: Ron Wagner
    Location: Union Reservoir
  149. Spotted Towhee Pipilo maculatus
    # Count: X
    Date:
    Observer: Ron Wagner
    Location: Union Reservoir
  150. Wood Duck Aix sponsa
    # Count: X
    Date:
    Observer: Ron Wagner
    Location: Lower Latham Reservoir area
  151. Osprey Pandion haliaetus
    # Count: X
    Date:
    Observer: Norm Lewis
    Location: Lower Latham Reservoir area
  152. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Robin Meredith
    Location: Pawnee NG--Pawnee Buttes and area
  153. Glossy Ibis Plegadis falcinellus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Weld County Rds. 42 and 43
  154. Great-tailed Grackle Quiscalus mexicanus
    # Count: X
    Date:
    Observer: Steve Pelikan
    Location: Union Reservoir
  155. Chimney Swift Chaetura pelagica
    # Count: X
    Date:
    Observer: Steve Pelikan
    Location: Rick's House Johnstown
  156. Plumbeous Vireo Vireo plumbeus
    # Count: 1
    Date:
    Observer: Marilyn Turnage
    Location: Pawnee Grasslands--Crow Valley Campground
  157. Hudsonian Godwit Limosa haemastica
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Severance
  158. Eastern Bluebird Sialia sialis
    # Count: 2
    Date:
    Observer: Bruce Hill
    Location: Pawnee NG--Central Plains Experimental Range
  159. Willow Flycatcher Empidonax traillii
    # Count: X
    Date:
    Observer: Scott Stoleson
    Location: Pawnee NG--Crow Valley CG
  160. Green-tailed Towhee Pipilo chlorurus
    # Count: X
    Date:
    Observer: David Guertin
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  161. Gray-crowned Rosy-Finch Leucosticte tephrocotis
    # Count: 200
    Date:
    Observer: Jim Dennis
    Location: Nunn
  162. Vermilion Flycatcher Pyrocephalus rubinus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Hudson
  163. Dickcissel Spiza americana
    # Count: X
    Date:
    Observer: Sue Renner Moske
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  164. King Rail Rallus elegans
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Lower Latham Reservoir area
  165. Red-throated Loon Gavia stellata
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Lower Latham Reservoir area
  166. Philadelphia Vireo Vireo philadelphicus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  167. Black-throated Blue Warbler Setophaga caerulescens
    # Count: 1
    Date:
    Observer: Carl Haynie
    Location: Pawnee NG--Crow Valley CG
  168. Yellow-billed Cuckoo Coccyzus americanus
    # Count: X
    Date:
    Observer: Lynda Brothers
    Location: Pawnee NG--Crow Valley CG
  169. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Shawn Ashbaugh
    Location: La Salle
  170. Tundra Swan Cygnus columbianus
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Union Reservoir
  171. Long-billed Curlew Numenius americanus
    # Count: 2
    Date:
    Observer: Spike Millington
    Location: Pawnee NG--Pawnee Buttes and area
  172. Least Flycatcher Empidonax minimus
    # Count: X
    Date:
    Observer: Jan Thom
    Location: Pawnee NG--Crow Valley CG
  173. White-rumped Sandpiper Calidris fuscicollis
    # Count: 1
    Date:
    Observer: Nita Heilman
    Location: Pawnee NG--Pawnee Buttes and area
  174. Barn Owl Tyto alba
    # Count: 2
    Date:
    Observer: John Vanderpoel
    Location: Riverside Reservoir (restricted access)
  175. Short-billed Gull Larus brachyrhynchus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  176. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Greeley to La Salle
  177. Brown Creeper Certhia americana
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Greeley to La Salle
  178. Pectoral Sandpiper Calidris melanotos
    # Count: 6
    Date:
    Observer: Werner Suter
    Location: Lower Latham Reservoir area
  179. Common Tern Sterna hirundo
    # Count: 1
    Date:
    Observer: Werner Suter
    Location: Lower Latham Reservoir area
  180. Yellow-throated Vireo Vireo flavifrons
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  181. Black-throated Green Warbler Setophaga virens
    # Count: 1
    Date:
    Observer: Vic Zerbi
    Location: Pawnee NG--Crow Valley CG
  182. Clark's Grebe Aechmophorus clarkii
    # Count: X
    Date:
    Observer: Chip Blake
    Location: Union Reservoir
  183. Red-breasted Merganser Mergus serrator
    # Count: 3
    Date:
    Observer: Mark Holmgren
    Location: Union Reservoir
  184. Eastern Screech-Owl Megascops asio
    # Count: 3
    Date:
    Observer: Kevin Moore
    Location: Pawnee NG--Pawnee Buttes and area
  185. Eastern Phoebe Sayornis phoebe
    # Count: X
    Date:
    Observer: William Zwartjes cc
    Location: Colorado-Weld Co.-Pawnee Grasslands-Toedtli Ranch
  186. Snow Bunting Plectrophenax nivalis
    # Count: 1
    Date:
    Observer: Bruce Bosley
    Location: Pawnee National Grassland, New Raymer US-CO (40.6204,-103.7725)
  187. Parasitic Jaeger Stercorarius parasiticus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  188. Ruff Calidris pugnax
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Weld Co. Rds. 6 and 61
  189. Tricolored Heron Egretta tricolor
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Masters
  190. White-winged Dove Zenaida asiatica
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: 20 miles west of Grover
  191. Hairy Woodpecker Dryobates villosus
    # Count: X
    Date:
    Observer: William Zwartjes cc
    Location: Colorado-Weld Co.-Ft. Lupton-Vollmar Schoolhouse
  192. Black-legged Kittiwake Rissa tridactyla
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  193. Golden-crowned Kinglet Regulus satrapa
    # Count: 1
    Date:
    Observer: Steve Larson
    Location: Pawnee NG--Crow Valley CG
  194. Townsend's Solitaire Myadestes townsendi
    # Count: 1
    Date:
    Observer: Steve Larson
    Location: Pawnee NG--Crow Valley CG
  195. Evening Grosbeak Coccothraustes vespertinus
    # Count: 2
    Date:
    Observer: Steve Larson
    Location: Pawnee NG--Crow Valley CG
  196. Virginia Rail Rallus limicola
    # Count: X
    Date:
    Observer: Bernard Morris
    Location: Lower Latham Reservoir area
  197. Short-billed Dowitcher Limnodromus griseus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  198. Gray-cheeked Thrush Catharus minimus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  199. Pacific Loon Gavia pacifica
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  200. Northern Shrike Lanius borealis
    # Count: 2
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  201. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  202. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  203. Clay-colored Sparrow Spizella pallida
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  204. Blackburnian Warbler Setophaga fusca
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  205. Pine Warbler Setophaga pinus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  206. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  207. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  208. Western Cattle Egret Bubulcus ibis
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  209. Upland Sandpiper Bartramia longicauda
    # Count: 1
    Date:
    Observer: Bruce Bosley
    Location: Kersey to Hudson road, Weld rd. 49
  210. Red-eyed Vireo Vireo olivaceus
    # Count: X
    Date:
    Observer: Narca Moore
    Location: Pawnee NG--Crow Valley CG
  211. Blue Jay Cyanocitta cristata
    # Count: X
    Date:
    Observer: Narca Moore
    Location: Pawnee NG--Crow Valley CG
  212. Piping Plover Charadrius melodus
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  213. Snowy Plover Anarhynchus nivosus
    # Count: X
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  214. Black-bellied Plover Pluvialis squatarola
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  215. White-faced Ibis Plegadis chihi
    # Count: 4
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  216. Short-eared Owl Asio flammeus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Pawnee NG--Crow Valley CG
  217. Snow Goose Anser caerulescens
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  218. Sharp-shinned Hawk Accipiter striatus
    # Count: X
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  219. Lewis's Woodpecker Melanerpes lewis
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  220. Barrow's Goldeneye Bucephala islandica
    # Count: 1
    Date:
    Observer: Bruce Bosley
    Location: Union Reservoir
  221. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 40
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  222. Little Gull Hydrocoloeus minutus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  223. Little Blue Heron Egretta caerulea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Prospect Reservoir (Weld Co.)
  224. Tree Swallow Tachycineta bicolor
    # Count: 1
    Date:
    Observer: Steve Laymon
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  225. Laughing Gull Leucophaeus atricilla
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Gill
  226. Bay-breasted Warbler Setophaga castanea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  227. Common Poorwill Phalaenoptilus nuttallii
    # Count: X
    Date:
    Observer: Stan Koster
    Location: Windsor Reservoir
  228. Black-necked Stilt Himantopus mexicanus
    # Count: X
    Date:
    Observer: Stan Koster
    Location: Windsor Reservoir
  229. Violet-green Swallow Tachycineta thalassina
    # Count: X
    Date:
    Observer: Stan Koster
    Location: Windsor Reservoir
  230. Common Goldeneye Bucephala clangula
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  231. Whooping Crane Grus americana
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Greeley
  232. Pomarine Jaeger Stercorarius pomarinus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Prospect Reservoir (Weld Co.)
  233. Whimbrel Numenius phaeopus
    # Count: 1
    Date:
    Observer: Karl Overman
    Location: Ault, .5 miles east of
  234. American Redstart Setophaga ruticilla
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Pawnee Grasslands
  235. Mountain Chickadee Poecile gambeli
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Pawnee Grasslands
  236. Lapland Longspur Calcarius lapponicus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Pawnee Grasslands
  237. Semipalmated Plover Charadrius semipalmatus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Leased Lake near Newill Lake
  238. Least Sandpiper Calidris minutilla
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Leased Lake near Newill Lake
  239. Semipalmated Sandpiper Calidris pusilla
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  240. Common Loon Gavia immer
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  241. Mountain Bluebird Sialia currucoides
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  242. Canvasback Aythya valisineria
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  243. Bufflehead Bucephala albeola
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Sautcy Lake
  244. Herring Gull Larus argentatus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Newill Lake
  245. Horned Grebe Podiceps auritus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Newill Lake
  246. Bald Eagle Haliaeetus leucocephalus
    # Count: 5
    Date:
    Observer: Hugh Kingery
    Location: Weld Ft St Vrain
  247. American Tree Sparrow Spizelloides arborea
    # Count: 150
    Date:
    Observer: Hugh Kingery
    Location: Weld Ft St Vrain
  248. Harris's Sparrow Zonotrichia querula
    # Count: 4
    Date:
    Observer: Hugh Kingery
    Location: Weld Ft St Vrain
  249. Rough-legged Hawk Buteo lagopus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Pawnee Grasslands
  250. Marsh Wren Cistothorus palustris
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  251. Red-necked Phalarope Phalaropus lobatus
    # Count: 125
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  252. Sanderling Calidris alba
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  253. Cassin's Kingbird Tyrannus vociferans
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  254. Marbled Godwit Limosa fedoa
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Prospect Reservoir (Weld Co.)
  255. Willet Tringa semipalmata
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Prospect Reservoir (Weld Co.)
  256. Cassin's Sparrow Peucaea cassinii
    # Count: 4
    Date:
    Observer: Van Truan
    Location: Pawnee NG--Pawnee Buttes and area
  257. Grasshopper Sparrow Ammodramus savannarum
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Pawnee NG--Pawnee Buttes and area
  258. Greater Yellowlegs Tringa melanoleuca
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Newill Lake
  259. Ferruginous Hawk Buteo regalis
    # Count: X
    Date:
    Observer: George Clark
    Location: Pawnee NG (Please use more-specific locations)
  260. Prairie Falcon Falco mexicanus
    # Count: X
    Date:
    Observer: George Clark
    Location: Pawnee NG (Please use more-specific locations)
  261. Chestnut-collared Longspur Calcarius ornatus
    # Count: X
    Date:
    Observer: George Clark
    Location: Pawnee NG (Please use more-specific locations)
  262. Blue Grosbeak Passerina caerulea
    # Count: X
    Date:
    Observer: George Clark
    Location: Pawnee NG (Please use more-specific locations)
  263. Rock Wren Salpinctes obsoletus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  264. Orchard Oriole Icterus spurius
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  265. Ring-necked Duck Aythya collaris
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  266. Wilson's Snipe Gallinago delicata
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  267. Spotted Sandpiper Actitis macularius
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  268. Stilt Sandpiper Calidris himantopus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  269. Turkey Vulture Cathartes aura
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  270. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  271. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  272. Red-breasted Nuthatch Sitta canadensis
    # Count: 6
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  273. American Pipit Anthus rubescens
    # Count: 12
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  274. Dark-eyed Junco Junco hyemalis
    # Count: 8
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  275. Vesper Sparrow Pooecetes gramineus
    # Count: 44
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  276. Savannah Sparrow Passerculus sandwichensis
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  277. Townsend's Warbler Setophaga townsendi
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  278. Wilson's Warbler Cardellina pusilla
    # Count: 26
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  279. Sedge Wren Cistothorus stellaris
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Lower Latham Reservoir area
  280. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  281. Western Sandpiper Calidris mauri
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  282. Northern Harrier Circus hudsonius
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  283. Sora Porzana carolina
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  284. Lesser Yellowlegs Tringa flavipes
    # Count: 9
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  285. American Bittern Botaurus lentiginosus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  286. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 6
    Date:
    Observer: Van Remsen
    Location: Banner Lakes SWA (closed April 1 - July 15)
  287. Solitary Sandpiper Tringa solitaria
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  288. Great Horned Owl Bubo virginianus
    # Count: 3
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  289. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  290. Gray Catbird Dumetella carolinensis
    # Count: 2
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  291. Brown Thrasher Toxostoma rufum
    # Count: 4
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  292. Swainson's Thrush Catharus ustulatus
    # Count: 8
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  293. Hermit Thrush Catharus guttatus
    # Count: 2
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  294. American Goldfinch Spinus tristis
    # Count: 5
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  295. Chipping Sparrow Spizella passerina
    # Count: 74
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  296. Lincoln's Sparrow Melospiza lincolnii
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  297. Orange-crowned Warbler Leiothlypis celata
    # Count: 2
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  298. Virginia's Warbler Leiothlypis virginiae
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  299. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 2
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  300. Blackpoll Warbler Setophaga striata
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  301. Yellow-rumped Warbler Setophaga coronata
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  302. Green-winged Teal Anas crecca
    # Count: 5
    Date:
    Observer: Hugh Kingery
    Location: Union Reservoir
  303. Black Tern Chlidonias niger
    # Count: 15
    Date:
    Observer: Van Remsen
    Location: Prospect Reservoir (Weld Co.)
  304. Northern Shoveler Spatula clypeata
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)
  305. Redhead Aythya americana
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)
  306. Ruddy Duck Oxyura jamaicensis
    # Count: 150
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)
  307. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)
  308. Sandhill Crane Antigone canadensis
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)
  309. Baird's Sandpiper Calidris bairdii
    # Count: X
    Date:
    Observer: Edmond Holroyd
    Location: Windsor Lake
  310. Canada Warbler Cardellina canadensis
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Pawnee NG--Crow Valley CG
  311. Blue-winged Teal Spatula discors
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  312. Ring-billed Gull Larus delawarensis
    # Count: 30
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  313. American White Pelican Pelecanus erythrorhynchos
    # Count: 9
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  314. Red-headed Woodpecker Melanerpes erythrocephalus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  315. Bank Swallow Riparia riparia
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  316. Lark Sparrow Chondestes grammacus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  317. Brown-headed Cowbird Molothrus ater
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  318. Common Yellowthroat Geothlypis trichas
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Lower Latham Reservoir area
  319. Eastern Kingbird Tyrannus tyrannus
    # Count: 1
    Date:
    Observer: MTOS- Shelby
    Location: Platte River and Hwy 34
  320. European Starling Sturnus vulgaris
    # Count: 3
    Date:
    Observer: MTOS- Shelby
    Location: Platte River and Hwy 34
  321. Ancient Murrelet Synthliboramphus antiquus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  322. Forster's Tern Sterna forsteri
    # Count: 1
    Date:
    Observer: Karl Overman
    Location: Greeley generic
  323. Canada Goose Branta canadensis
    # Count: 8
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  324. Cinnamon Teal Spatula cyanoptera
    # Count: 2
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  325. Gadwall Mareca strepera
    # Count: 55
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  326. American Wigeon Mareca americana
    # Count: 4
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  327. Mallard Anas platyrhynchos
    # Count: 40
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  328. Northern Pintail Anas acuta
    # Count: 25
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  329. Lesser Scaup Aythya affinis
    # Count: 70
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  330. Common Merganser Mergus merganser
    # Count: 3
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  331. Eared Grebe Podiceps nigricollis
    # Count: 4
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  332. Western Grebe Aechmophorus occidentalis
    # Count: 12
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  333. Rock Pigeon Columba livia
    # Count: 3
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  334. American Coot Fulica americana
    # Count: 45
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  335. Franklin's Gull Leucophaeus pipixcan
    # Count: 3
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  336. California Gull Larus californicus
    # Count: 100
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  337. Double-crested Cormorant Nannopterum auritum
    # Count: 35
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  338. Great Egret Ardea alba
    # Count: 1
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  339. Great Blue Heron Ardea herodias
    # Count: 11
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  340. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  341. Belted Kingfisher Megaceryle alcyon
    # Count: 2
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  342. Northern Flicker Colaptes auratus
    # Count: 6
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  343. Loggerhead Shrike Lanius ludovicianus
    # Count: 2
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  344. Black-capped Chickadee Poecile atricapillus
    # Count: 2
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  345. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  346. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 5
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  347. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: 100
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  348. Common Grackle Quiscalus quiscula
    # Count: 38
    Date:
    Observer: Donald Beaver
    Location: N Poudre Resevoir No 3
  349. Mourning Dove Zenaida macroura
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  350. Common Nighthawk Chordeiles minor
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  351. American Avocet Recurvirostra americana
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  352. Killdeer Charadrius vociferus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  353. Wilson's Phalarope Phalaropus tricolor
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  354. Golden Eagle Aquila chrysaetos
    # Count: 1
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  355. American Kestrel Falco sparverius
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  356. Western Wood-Pewee Contopus sordidulus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  357. Say's Phoebe Sayornis saya
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  358. Warbling Vireo Vireo gilvus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  359. American Crow Corvus brachyrhynchos
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  360. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  361. Horned Lark Eremophila alpestris
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  362. Cliff Swallow Petrochelidon pyrrhonota
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  363. House Wren Troglodytes aedon
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  364. Sage Thrasher Oreoscoptes montanus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  365. Northern Mockingbird Mimus polyglottos
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  366. American Robin Turdus migratorius
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  367. House Sparrow Passer domesticus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  368. House Finch Haemorhous mexicanus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  369. Thick-billed Longspur Rhynchophanes mccownii
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  370. Brewer's Sparrow Spizella breweri
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  371. Lark Bunting Calamospiza melanocorys
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  372. Song Sparrow Melospiza melodia
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  373. Bullock's Oriole Icterus bullockii
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  374. Red-winged Blackbird Agelaius phoeniceus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  375. Brewer's Blackbird Euphagus cyanocephalus
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  376. Yellow Warbler Setophaga petechia
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  377. Lazuli Bunting Passerina amoena
    # Count: X
    Date:
    Observer: John C. Miller Historic Data
    Location: Pawnee NG (Please use more-specific locations)
  378. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor
  379. Western Kingbird Tyrannus verticalis
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor
  380. Black-billed Magpie Pica hudsonia
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor
  381. Barn Swallow Hirundo rustica
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor
  382. Western Meadowlark Sturnella neglecta
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor
  383. Red Knot Calidris canutus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  384. Snowy Egret Egretta thula
    # Count: 2
    Date:
    Observer: Frank Justice
    Location: W of Ft. Lupton
  385. American Black Duck Anas rubripes
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Windsor
  386. Snowy Owl Bubo scandiacus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Masters
  387. Roseate Spoonbill Platalea ajaja
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Riverside Reservoir (restricted access)
  388. Arctic Tern Sterna paradisaea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Windsor
  389. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 1
    Date:
    Observer: Arthur C. Bent Data
    Location: Fort Lupton
  390. Long-tailed Jaeger Stercorarius longicaudus
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Windsor Reservoir
  391. Mountain Plover Anarhynchus montanus
    # Count: X
    Date:
    Observer: Thomas Tinsley
    Location: Pawnee NG--Pawnee Buttes and area
  392. Black Rail Laterallus jamaicensis
    # Count: 2
  393. Long-eared Owl Asio otus
    # Count: 1
  394. Gyrfalcon Falco rusticolus
    # Count: 1

Exotic: Provisional (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: 1
    Date:
    Observer: Steve Warnick
    Location: Windsor

Exotic: Escapee (13)

  1. Indian Peafowl Pavo cristatus
    # Count: 4
    Date:
    Observer: Mark Amershek
    Location: Northwest Area - Barr Lake CBC
  2. Red Junglefowl Gallus gallus
    # Count: 4
    Date:
    Observer: Susan Rosine
    Location: Lower Latham Reservoir area
  3. Budgerigar Melopsittacus undulatus
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Greeley
  4. Helmeted Guineafowl Numida meleagris
    # Count: 9
    Date:
    Observer: Joshua Smith
    Location: Pawnee National Grassland, Briggsdale US-CO (40.6396,-104.3340)
  5. Muscovy Duck Cairina moschata
    # Count: 1
    Date:
    Observer: Bryan Guarente
    Location: Idaho Creek Open Space
  6. Black Swan Cygnus atratus
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Phoenix Weaponry pond--Weld County
  7. Scaled Quail Callipepla squamata
    # Count: 1
    Date:
    Observer: Renee Casias
    Location: Pawnee NG--Central Plains Experimental Range
  8. African Collared-Dove Streptopelia roseogrisea
    # Count: 2
    Date:
    Observer: Chris Wood
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  9. Chukar Alectoris chukar
    # Count: 1
    Date:
    Observer: Rudolf Koes
    Location: CO - Rd. 100 just W of Nunn
  10. Graylag Goose Anser anser
    # Count: 2
    Date:
    Observer: Frank and Nancy Hatch
    Location: Glenmere Park
  11. Mute Swan Cygnus olor
    # Count: X
    Date:
    Observer: Al Guarente
    Location: Lower Latham Reservoir area
  12. Greater Prairie-Chicken Tympanuchus cupido
    # Count: 4
    Date:
    Observer: Grant Beauprez
    Location: Well's Ranch
  13. Northern Bobwhite Colinus virginianus
    # Count: X
    Date:
    Observer: John Lindfors
    Location: Pawnee Grasslands

Hybrids (49)

  1. Black x Eastern Phoebe (hybrid) Sayornis nigricans x phoebe
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  2. Snow x Greater White-fronted Goose (hybrid) Anser caerulescens x albifrons
    # Count: 1
    Date:
    Observer: Chuck Aid
    Location: Stewart's Pond
  3. Downy x Hairy Woodpecker (hybrid) Dryobates pubescens x villosus
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Pawnee NG--Crow Valley CG
  4. Herring x Lesser Black-backed Gull (hybrid) Larus argentatus x fuscus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Union Reservoir
  5. Laughing x Ring-billed Gull (hybrid) Leucophaeus atricilla x Larus delawarensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Union Reservoir
  6. Northern Shoveler x Mallard (hybrid) Spatula clypeata x Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Ryan Graves
    Location: 630 Vermilion Peak Drive
  7. Bufflehead x Hooded Merganser (hybrid) Bucephala albeola x Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  8. Cinnamon Teal x Northern Shoveler (hybrid) Spatula cyanoptera x clypeata
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Beebe Draw area
  9. Common x Barrow's Goldeneye (hybrid) Bucephala clangula x islandica
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: LUNA Reservoir
  10. Western x Eastern Meadowlark (hybrid) Sturnella neglecta x magna
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Lower Latham Reservoir area
  11. Snow/Ross's x Cackling/Canada Goose (hybrid) Anser caerulescens/rossii x Branta hutchinsii/canadensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Windsor Lake
  12. Graylag x Canada Goose (hybrid) Anser anser x Branta canadensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Windsor Reservoir
  13. Townsend's x Black-throated Green Warbler (hybrid) Setophaga townsendi x virens
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  14. Northern Shoveler x American Wigeon (hybrid) Spatula clypeata x Mareca americana
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  15. Canvasback x Redhead (hybrid) Aythya valisineria x americana
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: LUNA Reservoir
  16. Redhead x Ring-necked Duck (hybrid) Aythya americana x collaris
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Loloff Reservoir
  17. Northern Shoveler x Gadwall (hybrid) Spatula clypeata x Mareca strepera
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Stewart's Pond
  18. Herring x Glaucous Gull (hybrid) Larus argentatus x hyperboreus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Windsor Lake
  19. Bufflehead x Common Goldeneye (hybrid) Bucephala albeola x clangula
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Seeley Reservoir
  20. Mallard x Mottled Duck (hybrid) Anas platyrhynchos x fulvigula
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Stewart's Pond
  21. Yellow-bellied x Red-naped Sapsucker (hybrid) Sphyrapicus varius x nuchalis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  22. Greater White-fronted x Cackling Goose (hybrid) Anser albifrons x Branta hutchinsii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  23. Eurasian Collared-Dove x Mourning Dove (hybrid) Streptopelia decaocto x Zenaida macroura
    # Count: 1
    Date:
    Observer: Sean Walters
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  24. American Wigeon x Mallard (hybrid) Mareca americana x Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Stewart's Pond
  25. Blue-winged Teal x Northern Shoveler (hybrid) Spatula discors x clypeata
    # Count: 1
    Date:
    Observer: Cathy Sheeter
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  26. Common Goldeneye x Hooded Merganser (hybrid) Bucephala clangula x Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Weld County Road 7 Ponds
  27. Redhead x scaup sp. (hybrid) Aythya americana x marila/affinis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  28. Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acuta
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Woods Lake
  29. Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diazi
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Woods Lake
  30. Ross's x Canada Goose (hybrid) Anser rossii x Branta canadensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Greeley: Poudre River Trail at 35th
  31. Barn x Cliff Swallow (hybrid) Hirundo rustica x Petrochelidon pyrrhonota
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Weld CR 59 wetlands
  32. Tufted Duck x Lesser Scaup (hybrid) Aythya fuligula x affinis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Firestone Gravel Pits (view from road)
  33. Snow x Ross's Goose (hybrid) Anser caerulescens x rossii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Kersey Dairy Ponds
  34. Ross's x Cackling Goose (hybrid) Anser rossii x Branta hutchinsii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  35. Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Frederick Lake (Milavec Reservoir) & Recreation Area
  36. Ring-necked Duck x Lesser Scaup (hybrid) Aythya collaris x affinis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Loloff Reservoir
  37. Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Greeley: Sanborn Park
  38. Snow x Cackling Goose (hybrid) Anser caerulescens x Branta hutchinsii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Bittersweet Park
  39. Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  40. Rose-breasted x Black-headed Grosbeak (hybrid) Pheucticus ludovicianus x melanocephalus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  41. Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyanea
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  42. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    # Count: 4
    Date:
    Observer: Steven Mlodinow
    Location: Windsor Lake
  43. Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Weld County Road 7 Ponds
  44. Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Black Hollow Reservoir
  45. Bullock's x Baltimore Oriole (hybrid) Icterus bullockii x galbula
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Crow Valley Campground
  46. Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihi
    # Count: 2
    Date:
    Observer: Christian Nunes
    Location: Union Reservoir
  47. Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripes
    # Count: 1
    Date:
    Observer: Chris Wood
    Location: Weld CR17--(CR2 & CR4)
  48. Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanoptera
    # Count: 1
    Date:
    Observer: Doug Ward
    Location: Lower Latham Reservoir area
  49. Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Mark Holmgren
    Location: Union Reservoir

Additional Taxa (128)

  1. Lincoln's/Swamp Sparrow Melospiza lincolnii/georgiana
    # Count: 1
    Date:
    Observer: Chris Goulart
    Location: Pawnee NG Bird Tour—Stops 9-11 (CR-104)
  2. Grasshopper/Baird's Sparrow Ammodramus savannarum/Centronyx bairdii
    # Count: 1
    Date:
    Observer: Kieran Schnitzspahn
    Location: Pawnee NG--Weld CR 45 from CR 114 to 122
  3. Western/Eastern Meadowlark Sturnella neglecta/magna
    # Count: 12
    Date:
    Observer: Mary Ann Levan
    Location: Sandstone Ranch
  4. Ring-necked/Green Pheasant Phasianus colchicus/versicolor
    # Count: 2
    Date:
    Observer: Ariel Kallenbach
    Location: Sandstone Ranch
  5. Haemorhous sp. Haemorhous sp.
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Pawnee NG--Crow Valley CG
  6. towhee sp. Melozone/Pipilo sp.
    # Count: 1
    Date:
    Observer: Janet Hinshaw
    Location: Pawnee NG (Please use more-specific locations)
  7. Herring/Glaucous-winged Gull Larus argentatus/glaucescens
    # Count: 1
    Date:
    Observer: David Wade
    Location: Black Hollow Reservoir
  8. Western/Chihuahuan Meadowlark Sturnella neglecta/lilianae
    # Count: 1
    Date:
    Observer: Deb Eiger
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  9. merganser sp. Mergellus/Lophodytes/Mergus sp.
    # Count: 1
    Date:
    Observer: Kai Webler
    Location: Sandstone Ranch
  10. Eastern/Chihuahuan Meadowlark Sturnella magna/lilianae
    # Count: 1
    Date:
    Observer: Gene Rutherford
    Location: Pawnee NG--Norma's Grove
  11. Long-eared/Short-eared Owl Asio otus/flammeus
    # Count: 1
    Date:
    Observer: Bruce Bosley
    Location: Pawnee National Grassland, New Raymer US-CO (40.6204,-103.7725)
  12. Calidris sp. Calidris sp.
    # Count: 3
    Date:
    Observer: Jeff Gerbracht
    Location: Pawnee National Grassland, Ault US-CO (40.7928,-104.5617)
  13. Mallard/Mexican Duck Anas platyrhynchos/diazi
    # Count: X
    Date:
    Observer: Cheri & Rich Phillips
    Location: Weld CRs 61 & 74 ponds
  14. Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
    # Count: 1
    Date:
    Observer: Ryan Graves
    Location: Glenmere Park
  15. rosy-finch sp. Leucosticte sp.
    # Count: 120
    Date:
    Observer: Gene Rutherford
    Location: Grover, Colorado, US (40.971, -104.069)
  16. pipit sp. Anthus sp.
    # Count: 1
    Date:
    Observer: David Leatherman
    Location: Pawnee NG--Crow Valley CG
  17. bird sp. Aves sp.
    # Count: X
    Date:
    Observer: Luke Pheneger
    Location: Union Reservoir
  18. Eurasian/American Wigeon Mareca penelope/americana
    # Count: 2
    Date:
    Observer: yvonne parrott
    Location: Stewart Ponds Gilcrest Colo
  19. Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violacea
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Baxter Lake
  20. Myiarchus sp. Myiarchus sp.
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  21. Toxostoma sp. Toxostoma sp.
    # Count: 2
    Date:
    Observer: Walter Wehtje
    Location: Pawnee NG--Crow Valley CG
  22. eagle sp. Accipitridae sp. (eagle sp.)
    # Count: 1
    Date:
    Observer: Esther Martinez
    Location: Eagle spotted
  23. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Scott Severs
    Location: Peschel OS1
  24. sapsucker sp. Sphyrapicus sp.
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Pawnee NG--Crow Valley CG
  25. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    # Count: 1
    Date:
    Observer: Chad King
    Location: Field in Greeley
  26. Zonotrichia sp. Zonotrichia sp.
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Frank SWA / Poudre River Trail
  27. Common/Arctic Tern Sterna hirundo/paradisaea
    # Count: 2
    Date:
    Observer: Oscar Johnson
    Location: Riverside Reservoir (restricted access)
  28. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    # Count: 1
    Date:
    Observer: Will Piper
    Location: Colorado-Weld Co.-Ft. Lupton-Vollmar Schoolhouse
  29. Catharus sp. Catharus sp.
    # Count: 1
    Date:
    Observer: Ken Pals
    Location: Pawnee NG--Crow Valley CG
  30. Herring/Iceland Gull Larus argentatus/glaucoides
    # Count: 1
    Date:
    Observer: Cathy Sheeter
    Location: Firestone Gravel Pits (view from road)
  31. cormorant sp. Phalacrocoracidae sp.
    # Count: 30
    Date:
    Observer: Chris Goulart
    Location: Mose Davis Lake area
  32. shrike sp. Lanius sp.
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Black Hollow Reservoir
  33. teal sp. Anatidae sp. (teal sp.)
    # Count: 5
    Date:
    Observer: Steven Mlodinow
    Location: Lower Latham Reservoir area
  34. passerine sp. Passeriformes sp.
    # Count: 6
    Date:
    Observer: Scott Baron
    Location: Pawnee NG--Crow Valley CG
  35. Red/Red-necked Phalarope Phalaropus fulicarius/lobatus
    # Count: 25
    Date:
    Observer: Mary O'Connor
    Location: Loloff Reservoir
  36. Sedge/Marsh Wren Cistothorus stellaris/palustris
    # Count: 1
    Date:
    Observer: Cathy Sheeter
    Location: Prospect Reservoir (Weld Co.)
  37. Selasphorus sp. Selasphorus sp.
    # Count: 1
    Date:
    Observer: Jon King
    Location: Pawnee NG--Crow Valley CG
  38. Gray/Dusky Flycatcher Empidonax wrightii/oberholseri
    # Count: 2
    Date:
    Observer: Christopher Hollister
    Location: Pawnee NG--Crow Valley CG
  39. nightjar sp. Caprimulgidae sp.
    # Count: 1
    Date:
    Observer: Andrew Burnett
    Location: Pawnee NG--Pawnee Buttes and area
  40. small falcon sp. Falco sp. (small falcon sp.)
    # Count: 1
    Date:
    Observer: Cathy Sheeter
    Location: Glenmere Park
  41. Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus
    # Count: 1
    Date:
    Observer: Joanne Howl
    Location: Covington Knoll
  42. new world oriole sp. Icterus sp.
    # Count: 1
    Date:
    Observer: Catherine Labio
    Location: Pawnee NG--Crow Valley CG
  43. hummingbird sp. Trochilidae sp.
    # Count: 1
    Date:
    Observer: Bob Gobeille
    Location: 46504 cr 13
  44. Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmus
    # Count: 2
    Date:
    Observer: Jonelle Balais
    Location: Pawnee NG--Crow Valley CG
  45. tern sp. Sterninae sp.
    # Count: 1
    Date:
    Observer: Thomas Bunker
    Location: Firestone Gravel Pits (view from road)
  46. Trumpeter/Tundra Swan Cygnus buccinator/columbianus
    # Count: 1
    Date:
    Observer: Bill Schmoker
    Location: Weld CR 59 wetlands
  47. Tringa sp. Tringa sp.
    # Count: 1
    Date:
    Observer: Mark Minner-Lee 🦉
    Location: St. Vrain SP
  48. pigeon/dove sp. Columbidae sp.
    # Count: 1
    Date:
    Observer: Todd Deininger
    Location: Frederick High School
  49. Larus sp. Larus sp.
    # Count: 1
    Date:
    Observer: Nick Komar
    Location: Black Hollow Reservoir
  50. grackle sp. Quiscalus sp.
    # Count: 8
    Date:
    Observer: Peter Burke
    Location: Union Reservoir
  51. Buteo/eagle sp. Buteo/eagle sp.
    # Count: 1
    Date:
    Observer: Todd Deininger
    Location: Frederick High School
  52. Common/Barrow's Goldeneye Bucephala clangula/islandica
    # Count: 3
    Date:
    Observer: Anonymous eBirder
    Location: US-CO-Longmont - 40.1816x-104.9726 - Feb 18, 2013, 12:04 PM
  53. crow/raven sp. Corvus sp.
    # Count: 2
    Date:
    Observer: Jonathan Wisner
    Location: Ehrlich Lake
  54. large falcon sp. Falco sp. (large falcon sp.)
    # Count: 1
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Drake Lake
  55. plover sp. Charadriidae sp.
    # Count: X
    Date:
    Observer: Gloria Nikolai
    Location: Union Reservoir
  56. Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus
    # Count: X
    Date:
    Observer: Charlie Curlee
    Location: Pawnee NG--Crow Valley CG
  57. goose sp. Anatidae (goose sp.)
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Glenmere Park
  58. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Marcel Such
    Location: Union Reservoir
  59. white egret sp. Egretta/Bubulcus/Ardea sp.
    # Count: 2
    Date:
    Observer: Cheryl Chessick
    Location: Lower Latham Reservoir area
  60. American/Pacific Golden-Plover (Lesser Golden-Plover) Pluvialis dominica/fulva
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee Grasslands: BYO Playa
  61. Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/traillii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Pawnee NG--Crow Valley CG
  62. Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalis
    # Count: 1
    Date:
    Observer: Cole Fredricks
    Location: Pawnee NG--Crow Valley CG
  63. new world warbler sp. Parulidae sp.
    # Count: 1
    Date:
    Observer: Christian Nunes
    Location: Pawnee NG--Crow Valley CG
  64. phalarope sp. Phalaropus sp.
    # Count: 3
    Date:
    Observer: Thomas Bunker
    Location: Pawnee NG--Crow Valley CG
  65. Lazuli/Indigo Bunting Passerina amoena/cyanea
    # Count: 3
    Date:
    Observer: Ted Floyd
    Location: Crow Valley Campground
  66. blackbird sp. Icteridae sp.
    # Count: 100
    Date:
    Observer:
    Location: USCOWeld+40.35063-104.94402
  67. Arctic/Pacific Loon Gavia arctica/pacifica
    # Count: 1
    Date:
    Observer: Mike Blatchley
    Location: Union Reservoir
  68. Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseri
    # Count: 2
    Date:
    Observer: Christopher Takacs
    Location: Pawnee NG--Crow Valley CG
  69. Bullock's/Baltimore Oriole Icterus bullockii/galbula
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Crow Valley Campground
  70. Cassin's/Blue-headed Vireo Vireo cassinii/solitarius
    # Count: 2
    Date:
    Observer: Charles Lowrie
    Location: Pawnee NG--Crow Valley CG
  71. swan sp. Cygnus sp.
    # Count: 6
    Date:
    Observer: Anonymous eBirder
    Location: Baxter Lake, Berthoud
  72. shorebird sp. Charadriiformes sp.
    # Count: 30
    Date:
    Observer: Gray Gallogly Records
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  73. woodpecker sp. Picidae sp.
    # Count: 1
    Date:
    Observer: Laurita Summerton
    Location: Pawnee NG--Pawnee Buttes and area
  74. Common/Red-breasted Merganser Mergus merganser/serrator
    # Count: X
    Date:
    Observer: Stephen Smith
    Location: Union Reservoir
  75. pewee sp. (Contopus sp.) Contopus sp.
    # Count: X
    Date:
    Observer: Anonymous eBirder
    Location: Crow Valley, Briggsdale
  76. Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
    # Count: 1
    Date:
    Observer: Mark Linardi
    Location: Pawnee National Grasslands
  77. Passerina sp. Passerina sp.
    # Count: X
    Date:
    Observer: Maggie Boswell
    Location: Erie (town)
  78. solitary vireo sp. Vireo cassinii/solitarius/plumbeus
    # Count: 2
    Date:
    Observer: Tony Leukering
    Location: Pawnee NG--Crow Valley Work Center
  79. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    # Count: 1
    Date:
    Observer: Marcia Clouser
    Location: Pawnee NG--Crow Valley CG
  80. Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
    # Count: X
    Date:
    Observer: Lynda Brothers
    Location: Pawnee NG (Please use more-specific locations)
  81. Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalus
    # Count: 1
    Date:
    Observer: Nick Komar
    Location: South Platt River crossing at CR53
  82. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    # Count: 1
    Date:
    Observer: Steven Guy
    Location: Lower Latham Reservoir area
  83. falcon sp. Falco sp.
    # Count: X
    Date:
    Observer: Andrew Core
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  84. rail/crake sp. Rallidae sp. (rail/crake sp.)
    # Count: X
    Date:
    Observer: Candice Johnson
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  85. Snow/Ross's Goose Anser caerulescens/rossii
    # Count: 1
    Date:
    Observer: Paul Sweet
    Location: Hummel Reservoir
  86. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 30
    Date:
    Observer: Joey Kellner
    Location: Lochbuie Pond
  87. Western/Eastern Wood-Pewee Contopus sordidulus/virens
    # Count: X
    Date:
    Observer: Irene Rivas
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  88. Aythya sp. Aythya sp.
    # Count: 20
    Date:
    Observer: Marquis Lachance
    Location: Lower Latham Reservoir area
  89. grebe sp. Podicipedidae sp.
    # Count: 40
    Date:
    Observer: Marquis Lachance
    Location: Lower Latham Reservoir area
  90. Forster's/Common Tern Sterna forsteri/hirundo
    # Count: 3
    Date:
    Observer: Marquis Lachance
    Location: Lower Latham Reservoir area
  91. Horned/Eared Grebe Podiceps auritus/nigricollis
    # Count: X
    Date:
    Observer: David Ely
    Location: Union Reservoir
  92. Accipiter sp. Accipiter sp.
    # Count: 1
    Date:
    Observer: Robert Kuntz II
    Location: Pawnee NG--Crow Valley CG
  93. yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)
    # Count: 2
    Date:
    Observer: Allen Chartier
    Location: Pawnee NG--Pawnee Buttes and area
  94. bluebird sp. Sialia sp.
    # Count: X
    Date:
    Observer: Linda Frederick
    Location: Foster Reservoir
  95. wren sp. Troglodytidae sp.
    # Count: 1
    Date:
    Observer: Joseph Gebler
    Location: Pawnee National Grasslands
  96. new world sparrow sp. Passerellidae sp.
    # Count: X
    Date:
    Observer: David Ely
    Location: Weld Co.,CO- Timnath Marsh
  97. Sterna sp. Sterna sp.
    # Count: 5
    Date:
    Observer: Mark Robbins
    Location: Riverside Reservoir (restricted access)
  98. Loggerhead/Northern Shrike Lanius ludovicianus/borealis
    # Count: 1
    Date:
    Observer: Matt Beisel
    Location: CO; I-76
  99. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    # Count: 2
    Date:
    Observer: Bruce Hill
    Location: Pawnee NG--Norma's Grove
  100. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    # Count: X
    Date:
    Observer: David Hayes
    Location: Lakes E of Severance
  101. nighthawk sp. Chordeiles sp.
    # Count: 1
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  102. swift sp. Apodidae sp.
    # Count: 5
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  103. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    # Count: 1
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  104. new world flycatcher sp. Tyrannidae sp.
    # Count: 6
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  105. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    # Count: 1
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  106. swallow sp. Hirundinidae sp.
    # Count: 10
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  107. thrush sp. Turdidae sp.
    # Count: 2
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  108. finch sp. Fringillidae sp.
    # Count: 10
    Date:
    Observer: Malcolm Hodges
    Location: Pawnee NG--Pawnee Buttes and area
  109. Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.
    # Count: 2
    Date:
    Observer: Rosario Douglas
    Location: Pawnee NG--Pawnee Buttes and area
  110. gull sp. Larinae sp.
    # Count: X
    Date:
    Observer: Cameron Eckert
    Location: Pawnee National Grasslands
  111. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    # Count: 10
    Date:
    Observer: Todd Myers
    Location: Windsor Lake
  112. Western/Semipalmated Sandpiper Calidris mauri/pusilla
    # Count: 4
    Date:
    Observer: Hank Zaletel
    Location: Windsor Reservoir
  113. peep sp. Calidris sp. (peep sp.)
    # Count: 6
    Date:
    Observer: ISS Data
    Location: Windsor Reservoir
  114. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: X
    Date:
    Observer: Lynda Brothers
    Location: Pawnee NG--Crow Valley CG
  115. vireo sp. Vireo sp.
    # Count: X
    Date:
    Observer: Adelia Honeywood
    Location: Pawnee NG--Pawnee Buttes and area
  116. longspur sp. Calcarius/Rhynchophanes sp.
    # Count: 12
    Date:
    Observer: Timothy Davis
    Location: Pawnee NG Bird Tour--CR-96
  117. jaeger sp. Stercorarius sp. (jaeger sp.)
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Union Reservoir
  118. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: US-CO-Weld—drive along Highway 36
  119. Sturnella meadowlark sp. Sturnella sp.
    # Count: X
    Date:
    Observer: Narca Moore
    Location: Pawnee NG--Crow Valley CG
  120. owl sp. Strigiformes sp.
    # Count: 1
    Date:
    Observer: Narca Moore
    Location: US-CO-Weld—Farmhouse where I lived
  121. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 60
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  122. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 80
    Date:
    Observer: Narca Moore
    Location: Union Reservoir
  123. Greater/Lesser Scaup Aythya marila/affinis
    # Count: X
    Date:
    Observer: Stan Koster
    Location: Windsor Reservoir
  124. raven sp. Corvus sp. (raven sp.)
    # Count: 1
    Date:
    Observer: Karl Overman
    Location: Stoneham, 3 miles west
  125. duck sp. Anatidae (duck sp.)
    # Count: 500
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  126. Spizella sp. Spizella sp.
    # Count: 20
    Date:
    Observer: Van Remsen
    Location: CO: Weld Co.; Horse Creek Res - Prospect Res. area
  127. Empidonax sp. Empidonax sp.
    # Count: 6
    Date:
    Observer: Hugh Kingery
    Location: Pawnee NG--Crow Valley CG
  128. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 2800
    Date:
    Observer: Van Remsen
    Location: Horse Creek Reservoir (Weld Co side)