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Bird List

Updated ~8 days ago
517 All Years 390 This Year 2024 347 This Month May 2024 302 Global Big Day 8 May 2021
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (301)

  1. Canada Goose Branta canadensis
    # Count: 4
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  2. Mallard Anas platyrhynchos
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  3. Wild Turkey Meleagris gallopavo
    # Count: 7
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  4. Rock Pigeon Columba livia
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  5. Mourning Dove Zenaida macroura
    # Count: 4
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  6. Black-chinned Hummingbird Archilochus alexandri
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  7. Double-crested Cormorant Nannopterum auritum
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  8. Turkey Vulture Cathartes aura
    # Count: 6
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  9. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  10. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  11. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  12. Northern Flicker Colaptes auratus
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  13. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  14. Western Kingbird Tyrannus verticalis
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  15. Woodhouse's Scrub-Jay Aphelocoma woodhouseii
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  16. Black-billed Magpie Pica hudsonia
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  17. American Crow Corvus brachyrhynchos
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  18. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  19. Bank Swallow Riparia riparia
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  20. Tree Swallow Tachycineta bicolor
    # Count: 5
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  21. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  22. Western Bluebird Sialia mexicana
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  23. American Robin Turdus migratorius
    # Count: 4
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  24. Cedar Waxwing Bombycilla cedrorum
    # Count: 21
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  25. House Finch Haemorhous mexicanus
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  26. Song Sparrow Melospiza melodia
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  27. Spotted Towhee Pipilo maculatus
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  28. Western Meadowlark Sturnella neglecta
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  29. Red-winged Blackbird Agelaius phoeniceus
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  30. Brown-headed Cowbird Molothrus ater
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  31. Common Grackle Quiscalus quiscula
    # Count: 6
    Date:
    Observer: Shannon Murphy
    Location: Castlewood Canyon SP Douglas
  32. Common Merganser Mergus merganser
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  33. American Coot Fulica americana
    # Count: 7
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  34. Killdeer Charadrius vociferus
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  35. Spotted Sandpiper Actitis macularius
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  36. American White Pelican Pelecanus erythrorhynchos
    # Count: 10
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  37. Great Blue Heron Ardea herodias
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  38. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  39. Swainson's Hawk Buteo swainsoni
    # Count: 3
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  40. Great Horned Owl Bubo virginianus
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  41. Black-capped Chickadee Poecile atricapillus
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  42. House Wren Troglodytes aedon
    # Count: 7
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  43. European Starling Sturnus vulgaris
    # Count: 8
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  44. Gray Catbird Dumetella carolinensis
    # Count: 2
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  45. Yellow-breasted Chat Icteria virens
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  46. Yellow Warbler Setophaga petechia
    # Count: 1
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  47. Yellow-rumped Warbler Setophaga coronata
    # Count: 4
    Date:
    Observer: Shannon Murphy
    Location: Chatfield SP--Plum Creek Nature Area Douglas
  48. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 2
    Date:
    Observer: Ken Kenny
    Location: 810 32nd St, Boulder US-CO 40.00221, -105.25093 Boulder
  49. Broad-tailed Hummingbird Selasphorus platycercus
    # Count: 3
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  50. Cooper's Hawk Accipiter cooperii
    # Count: 3
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  51. Blue Jay Cyanocitta cristata
    # Count: 15
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  52. Bushtit Psaltriparus minimus
    # Count: 1
    Date:
    Observer: Ken Kenny
    Location: 810 32nd St, Boulder US-CO 40.00221, -105.25093 Boulder
  53. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  54. House Sparrow Passer domesticus
    # Count: 2
    Date:
    Observer: Ken Kenny
    Location: 810 32nd St, Boulder US-CO 40.00221, -105.25093 Boulder
  55. Pine Siskin Spinus pinus
    # Count: 3
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  56. Lesser Goldfinch Spinus psaltria
    # Count: 1
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  57. American Goldfinch Spinus tristis
    # Count: 1
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  58. Chipping Sparrow Spizella passerina
    # Count: 1
    Date:
    Observer: Ken Kenny
    Location: 810 32nd St, Boulder US-CO 40.00221, -105.25093 Boulder
  59. Wilson's Warbler Cardellina pusilla
    # Count: 1
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  60. Lazuli Bunting Passerina amoena
    # Count: 1
    Date:
    Observer: Jean McClenathen
    Location: Tucker Gulch Jefferson
  61. Mountain Plover Anarhynchus montanus
    # Count: 2
    Date:
    Observer: Lori Pivonka
    Location: Playa at Weld CRs 77 & 116 Weld
  62. Least Sandpiper Calidris minutilla
    # Count: 1
    Date:
    Observer: Lori Pivonka
    Location: Playa at Weld CRs 77 & 116 Weld
  63. Common Nighthawk Chordeiles minor
    # Count: 1
    Date:
    Observer: Mike Thompson
    Location: San Juan National Forest, Dolores US-CO 37.66886, -108.39773 Dolores
  64. Virginia Rail Rallus limicola
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes SWA--below dam Baca
  65. Western Screech-Owl Megascops kennicottii
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes SWA--below dam Baca
  66. Flammulated Owl Psiloscops flammeolus
    # Count: 2
    Date:
    Observer: Robert Pike
    Location: 7390E CR 359 Archuleta
  67. Pygmy Nuthatch Sitta pygmaea
    # Count: 1
    Date:
    Observer: Aaron Hirsh
    Location: 334 Wild Horse Cir, Boulder US-CO 40.04994, -105.32265 Boulder
  68. Wilson's Snipe Gallinago delicata
    # Count: 1
    Date:
    Observer: Mike Thompson
    Location: San Juan National Forest, Dolores US-CO 37.79310, -108.24282 Dolores
  69. Lark Sparrow Chondestes grammacus
    # Count: 1
    Date:
    Observer: Ross Rafferty
    Location: 11206 W 107th Pl, Westminster US-CO 39.89216, -105.12115 Jefferson
  70. Blue-winged Teal Spatula discors
    # Count: 26
    Date:
    Observer: Mark Peterson
    Location: PHI CR 14 Phillips
  71. Gadwall Mareca strepera
    # Count: 4
    Date:
    Observer: Mark Peterson
    Location: PHI CR 14 Phillips
  72. Baird's Sandpiper Calidris bairdii
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: PHI CR 14 Phillips
  73. Semipalmated Sandpiper Calidris pusilla
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: PHI CR 14 Phillips
  74. Redhead Aythya americana
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  75. Lesser Scaup Aythya affinis
    # Count: 4
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  76. Bufflehead Bucephala albeola
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  77. Ruddy Duck Oxyura jamaicensis
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  78. Long-billed Curlew Numenius americanus
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  79. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Dave Sage
    Location: 30610 E Colfax Ave, Watkins US-CO (39.7385,-104.6326) Arapahoe
  80. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: 10
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  81. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Cattail Pond Larimer
  82. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 6
    Date:
    Observer: Jason Szyba
    Location: 40460–40638 CR-36, Steamboat Springs US-CO 40.50814, -106.82346 Routt
  83. Savannah Sparrow Passerculus sandwichensis
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: Uncompahgre River at Buckhorn Rd (Ouray County Only) Ouray
  84. Western Grebe Aechmophorus occidentalis
    # Count: 1
    Date:
    Observer: Ashton Eckerstorfer 🦆
    Location: Riverbend Ponds Natural Area Larimer
  85. Snowy Egret Egretta thula
    # Count: 1
    Date:
    Observer: Ashton Eckerstorfer 🦆
    Location: Riverbend Ponds Natural Area Larimer
  86. Northern Shoveler Spatula clypeata
    # Count: 3
    Date:
    Observer: Peter Williams
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  87. Green-winged Teal Anas crecca
    # Count: 1
    Date:
    Observer: Peter Williams
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  88. Eared Grebe Podiceps nigricollis
    # Count: 4
    Date:
    Observer: Peter Williams
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  89. American Avocet Recurvirostra americana
    # Count: 4
    Date:
    Observer: Peter Williams
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  90. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 4
    Date:
    Observer: Anthony Sanchez
    Location: Washington Park Denver
  91. Vesper Sparrow Pooecetes gramineus
    # Count: 1
    Date:
    Observer: Peter Williams
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  92. Wood Duck Aix sponsa
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: Haxtun sewage ponds Phillips
  93. Northern Pintail Anas acuta
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Haxtun sewage ponds Phillips
  94. Wilson's Phalarope Phalaropus tricolor
    # Count: X
    Date:
    Observer: Mark Peterson
    Location: Haxtun sewage ponds Phillips
  95. Red-necked Phalarope Phalaropus lobatus
    # Count: 7
    Date:
    Observer: Mark Peterson
    Location: Haxtun sewage ponds Phillips
  96. California Gull Larus californicus
    # Count: 28
    Date:
    Observer: Richard Bunn
    Location: Hondo Avenue (Teller County) Teller
  97. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Robert Doster
    Location: Interlocken Loop, Broomfield US-CO (39.9142,-105.1386) Broomfield
  98. Chimney Swift Chaetura pelagica
    # Count: 2
    Date:
    Observer: Paul Kinzer
    Location: 315 Main St, Sterling US-CO (40.6234,-103.2097) Logan
  99. Barn Swallow Hirundo rustica
    # Count: 3
    Date:
    Observer: Daniel Hueholt
    Location: Lee Martinez Park Larimer
  100. Lewis's Woodpecker Melanerpes lewis
    # Count: 6
    Date:
    Observer: Erik Hendrickson
    Location: Boyle Park Montezuma
  101. Cassin's Finch Haemorhous cassinii
    # Count: 2
    Date:
    Observer: Erik Hendrickson
    Location: Boyle Park Montezuma
  102. Northern Mockingbird Mimus polyglottos
    # Count: 1
    Date:
    Observer: Brenda Wright
    Location: County Road 18, Cortez, Colorado, US (37.467, -108.72) Montezuma
  103. Mountain Bluebird Sialia currucoides
    # Count: 3
    Date:
    Observer: Brenda Wright
    Location: County Road 18, Cortez, Colorado, US (37.467, -108.72) Montezuma
  104. Western Tanager Piranga ludoviciana
    # Count: 2
    Date:
    Observer: Jill Holden
    Location: jillshouse Douglas
  105. Cinnamon Teal Spatula cyanoptera
    # Count: 2
    Date:
    Observer: Byron Greco
    Location: Pagosa Springs--hot springs area Archuleta
  106. Violet-green Swallow Tachycineta thalassina
    # Count: 10
    Date:
    Observer: Byron Greco
    Location: Pagosa Springs--hot springs area Archuleta
  107. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 2
    Date:
    Observer: Byron Greco
    Location: Pagosa Springs--hot springs area Archuleta
  108. Sora Porzana carolina
    # Count: 3
    Date:
    Observer: Adam Vesely
    Location: Ft Lyon Wildlife Easement Bent
  109. Rose-breasted Grosbeak Pheucticus ludovicianus
    # Count: 1
    Date:
    Observer: Adam Vesely
    Location: Ft Lyon Wildlife Easement Bent
  110. Mississippi Kite Ictinia mississippiensis
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: Holyoke (town) Phillips
  111. Baltimore Oriole Icterus galbula
    # Count: 1
    Date:
    Observer: Jason Beason
    Location: 2665 Senter Ave, Burlington US-CO 39.30388, -102.28386 Kit Carson
  112. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: County Road 4B, Montrose, Colorado, US (38.262, -107.73) Ouray
  113. Mountain Chickadee Poecile gambeli
    # Count: 2
    Date:
    Observer: Jason Szyba
    Location: Yampa River Botanic Park, Steamboat Springs US-CO 40.47018, -106.82933 Routt
  114. Fox Sparrow Passerella iliaca
    # Count: 1
    Date:
    Observer: Jason Szyba
    Location: Yampa River Botanic Park, Steamboat Springs US-CO 40.47018, -106.82933 Routt
  115. Caspian Tern Hydroprogne caspia
    # Count: 1
    Date:
    Observer: Christopher Murray
    Location: Boyd Lake Larimer
  116. Brown Thrasher Toxostoma rufum
    # Count: 1
    Date:
    Observer: Christopher Murray
    Location: Boyd Lake Larimer
  117. Hooded Warbler Setophaga citrina
    # Count: 1
    Date:
    Observer: Christopher Murray
    Location: Boyd Lake Larimer
  118. Gambel's Quail Callipepla gambelii
    # Count: 2
    Date:
    Observer: Leah Waldner
    Location: 2002 Bison Ct, Grand Junction US-CO 39.08028, -108.67756 Mesa
  119. Marsh Wren Cistothorus palustris
    # Count: 1
    Date:
    Observer: Ariel Kallenbach
    Location: Sandstone Ranch Weld
  120. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 1
    Date:
    Observer: Jeremy Munn
    Location: 9864 W Elmhurst Pl, Littleton US-CO 39.57261, -105.10944 Jefferson
  121. Townsend's Solitaire Myadestes townsendi
    # Count: 1
    Date:
    Observer: Oliver Komar
    Location: 291 County Road 41, Walden, Colorado, US (40.552, -106.014) Jackson
  122. Ring-necked Duck Aythya collaris
    # Count: 2
    Date:
    Observer: Sue Riffe
    Location: Wetlands at US Hwy 40 & Grand CR 201 Grand
  123. White-winged Dove Zenaida asiatica
    # Count: 1
    Date:
    Observer: Karen Taylor
    Location: 117 Hays Avenue, Johnstown, Colorado, US (40.333, -104.917) Weld
  124. Clark's Grebe Aechmophorus clarkii
    # Count: 1
    Date:
    Observer: Rosanne Juergens
    Location: Ketring Park and Lake Arapahoe
  125. Dark-eyed Junco Junco hyemalis
    # Count: 1
    Date:
    Observer: Buzz Schaumberg
    Location: Loveland Ski Area Clear Creek
  126. Red-breasted Nuthatch Sitta canadensis
    # Count: 2
    Date:
    Observer: Mary Geder
    Location: 13850 W Harvard Dr, Lakewood US-CO 39.67117, -105.15440 Jefferson
  127. Dusky Grouse Dendragapus obscurus
    # Count: 3
    Date:
    Observer: Mike Thompson
    Location: San Juan National Forest, Dolores US-CO 37.79836, -108.22979 Dolores
  128. Canada Jay Perisoreus canadensis
    # Count: 1
    Date:
    Observer: Mike Thompson
    Location: San Juan National Forest, Dolores US-CO 37.79836, -108.22979 Dolores
  129. Steller's Jay Cyanocitta stelleri
    # Count: 1
    Date:
    Observer: Mike Thompson
    Location: San Juan National Forest, Dolores US-CO 37.79836, -108.22979 Dolores
  130. Solitary Sandpiper Tringa solitaria
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: Lion's Club Fishin' Hole Phillips
  131. Lincoln's Sparrow Melospiza lincolnii
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: Lion's Club Fishin' Hole Phillips
  132. Bobolink Dolichonyx oryzivorus
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Lion's Club Fishin' Hole Phillips
  133. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Big Dry Creek Trail--E 144th Ave to Rampart Reservoir Adams
  134. Golden Eagle Aquila chrysaetos
    # Count: 1
    Date:
    Observer: Aletheia Burnham
    Location: Watson Lake Larimer
  135. Horned Lark Eremophila alpestris
    # Count: 20
    Date:
    Observer: Matt Clark
    Location: Aroya (Cheyenne) Cheyenne
  136. Thick-billed Longspur Rhynchophanes mccownii
    # Count: 1
    Date:
    Observer: Matt Clark
    Location: Aroya (Cheyenne) Cheyenne
  137. Lark Bunting Calamospiza melanocorys
    # Count: 50
    Date:
    Observer: Matt Clark
    Location: Aroya (Cheyenne) Cheyenne
  138. Red-naped Sapsucker Sphyrapicus nuchalis
    # Count: 1
    Date:
    Observer: David de Rivera Tønnessen
    Location: 291 County Road 41, Walden, Colorado, US (40.554, -106.009) Jackson
  139. Eastern Kingbird Tyrannus tyrannus
    # Count: 2
    Date:
    Observer: Thomas Heinrich
    Location: Boulder Creek--75th St. Boulder
  140. Red Crossbill Loxia curvirostra
    # Count: 1
    Date:
    Observer: David de Rivera Tønnessen
    Location: 291 County Road 41, Walden, Colorado, US (40.554, -106.009) Jackson
  141. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 2
    Date:
    Observer: Andrew Rothman
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  142. Western Sandpiper Calidris mauri
    # Count: 3
    Date:
    Observer: Andrew Rothman
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  143. Forster's Tern Sterna forsteri
    # Count: 1
    Date:
    Observer: Andrew Rothman
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  144. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Paul Ode
    Location: Matthews-Reeser Bird Sanctuary Larimer
  145. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Paul Ode
    Location: Matthews-Reeser Bird Sanctuary Larimer
  146. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Paul Ode
    Location: Matthews-Reeser Bird Sanctuary Larimer
  147. Palm Warbler Setophaga palmarum
    # Count: 1
    Date:
    Observer: Paul Ode
    Location: Matthews-Reeser Bird Sanctuary Larimer
  148. Ring-billed Gull Larus delawarensis
    # Count: 2
    Date:
    Observer: Ariel Kallenbach
    Location: Union Reservoir Weld
  149. Brewer's Sparrow Spizella breweri
    # Count: 2
    Date:
    Observer: Jason B Bidgood
    Location: Sand Creek--Westerly Creek to Smith Rd Denver
  150. American Wigeon Mareca americana
    # Count: 6
    Date:
    Observer: Jean Folsom
    Location: Hodgson-Harris Reservoir Boulder
  151. Nashville Warbler Leiothlypis ruficapilla
    # Count: 1
    Date:
    Observer: Jean Folsom
    Location: Hodgson-Harris Reservoir Boulder
  152. Clay-colored Sparrow Spizella pallida
    # Count: 1
    Date:
    Observer: Gwen Moore
    Location: US-40, Kit Carson US-CO 38.82996, -103.03738 Cheyenne
  153. White-throated Sparrow Zonotrichia albicollis
    # Count: 1
    Date:
    Observer: Jake Shorty
    Location: Ponds at Argonne St Denver
  154. Great-tailed Grackle Quiscalus mexicanus
    # Count: 1
    Date:
    Observer: Gwen Moore
    Location: US-40, Kit Carson US-CO 38.82996, -103.03738 Cheyenne
  155. Canvasback Aythya valisineria
    # Count: 1
    Date:
    Observer: Jacqui Geiselman
    Location: Granada SWA--Midwestern Farms tract Prowers
  156. Stilt Sandpiper Calidris himantopus
    # Count: 1
    Date:
    Observer: Jacqui Geiselman
    Location: Granada SWA--Midwestern Farms tract Prowers
  157. Black Tern Chlidonias niger
    # Count: 1
    Date:
    Observer: Jacqui Geiselman
    Location: Granada SWA--Midwestern Farms tract Prowers
  158. Hooded Merganser Lophodytes cucullatus
    # Count: 3
    Date:
    Observer: Bethany Ferguson
    Location: Belmar Park Jefferson
  159. Dusky Flycatcher Empidonax oberholseri
    # Count: 1
    Date:
    Observer: Leslie S
    Location: Twin Lakes (Boulder County) Boulder
  160. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: Leslie S
    Location: Twin Lakes (Boulder County) Boulder
  161. Ferruginous Hawk Buteo regalis
    # Count: 2
    Date:
    Observer: Vanessa Moyle
    Location: Rocky Mountain Arsenal NWR Adams
  162. Bullock's Oriole Icterus bullockii
    # Count: 1
    Date:
    Observer: Vanessa Moyle
    Location: Rocky Mountain Arsenal NWR Adams
  163. White-faced Ibis Plegadis chihi
    # Count: 1
    Date:
    Observer: Jason Szyba
    Location: Stagecoach State Park, Oak Creek US-CO 40.26888, -106.88044 Routt
  164. Pinyon Jay Gymnorhinus cyanocephalus
    # Count: 1
    Date:
    Observer: mark yaeger
    Location: Rancho Radeaux Huerfano
  165. Hairy Woodpecker Dryobates villosus
    # Count: 2
    Date:
    Observer: Mitchell Bailey
    Location: Bijou Basin Open Space (Restricted Access) Arapahoe
  166. Cassin's Kingbird Tyrannus vociferans
    # Count: 2
    Date:
    Observer: Mitchell Bailey
    Location: Bijou Basin Open Space (Restricted Access) Arapahoe
  167. Great Egret Ardea alba
    # Count: 1
    Date:
    Observer: Jeff Birek
    Location: 5519 Lowell Blvd, Denver US-CO 39.79699, -105.03525 Adams
  168. American Dipper Cinclus mexicanus
    # Count: 1
    Date:
    Observer: Jeff Birek
    Location: 5519 Lowell Blvd, Denver US-CO 39.79699, -105.03525 Adams
  169. Swamp Sparrow Melospiza georgiana
    # Count: 1
    Date:
    Observer: Kelly Ormesher
    Location: Union Reservoir Weld
  170. White-throated Swift Aeronautes saxatalis
    # Count: 48
    Date:
    Observer: Weston Petty
    Location: Red Rocks Park Jefferson
  171. Prairie Falcon Falco mexicanus
    # Count: 1
    Date:
    Observer: Weston Petty
    Location: Red Rocks Park Jefferson
  172. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Byron Greco
    Location: Echo Canyon Lake SWA Archuleta
  173. Semipalmated Plover Charadrius semipalmatus
    # Count: 2
    Date:
    Observer: Byron Greco
    Location: Echo Canyon Lake SWA Archuleta
  174. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 75
    Date:
    Observer: Peggy Gonder
    Location: Standley Lake Park--north shore Jefferson
  175. Sage Thrasher Oreoscoptes montanus
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: Billy Creek SWA (Ouray Co) Ouray
  176. Black-throated Gray Warbler Setophaga nigrescens
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: Billy Creek SWA (Ouray Co) Ouray
  177. Pine Grosbeak Pinicola enucleator
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: 76 Aster Ln (Grand Cty, CO) Grand
  178. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: Cynthia Grover
    Location: Big Salt Wash - feeders Mesa
  179. Snow Goose Anser caerulescens
    # Count: 2
    Date:
    Observer: Phil Lyon
    Location: Highline Lake SP Mesa
  180. Willet Tringa semipalmata
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Highline Lake SP Mesa
  181. Franklin's Gull Leucophaeus pipixcan
    # Count: 3
    Date:
    Observer: Phil Lyon
    Location: Highline Lake SP Mesa
  182. Gray Flycatcher Empidonax wrightii
    # Count: 3
    Date:
    Observer: Brenda Wright
    Location: Lowry Ruins National Historical Landmark Montezuma
  183. Ash-throated Flycatcher Myiarchus cinerascens
    # Count: 1
    Date:
    Observer: Brenda Wright
    Location: Lowry Ruins National Historical Landmark Montezuma
  184. Bewick's Wren Thryomanes bewickii
    # Count: 1
    Date:
    Observer: Brenda Wright
    Location: Lowry Ruins National Historical Landmark Montezuma
  185. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 1
    Date:
    Observer: Chipper Phillips
    Location: Interlocken--Central Park Broomfield
  186. Clark's Nutcracker Nucifraga columbiana
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: Highway 550 Heron Rookery Ouray
  187. Lesser Yellowlegs Tringa flavipes
    # Count: 1
    Date:
    Observer: Lori Pivonka
    Location: Loloff Reservoir Weld
  188. Blackpoll Warbler Setophaga striata
    # Count: 1
    Date:
    Observer: Alexander Brown
    Location: 4560 Darley Avenue, Boulder Boulder
  189. Black-necked Stilt Himantopus mexicanus
    # Count: 2
    Date:
    Observer: Matt Hofeditz
    Location: Lake Hasty (lake and campground) Bent
  190. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Susan Rosine
    Location: County Road 0, Orchard US-CO 40.35765, -104.14745 Morgan
  191. Loggerhead Shrike Lanius ludovicianus
    # Count: 1
    Date:
    Observer: Mitchell Bailey
    Location: 48955 County Road 30, Bennett, Colorado, US (39.637, -104.413) Arapahoe
  192. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: X
    Date:
    Observer: Mindy Mueller
    Location: Quincy Reservoir Arapahoe
  193. Sandhill Crane Antigone canadensis
    # Count: 1
    Date:
    Observer: David de Rivera Tønnessen
    Location: N. Platte River at Jackson Co. Rd. 6W Jackson
  194. Black-and-white Warbler Mniotilta varia
    # Count: 1
    Date:
    Observer: Zach Wilson
    Location: 10558 West Vista View Drive, Littleton, Colorado, US (39.59, -105.116) Jefferson
  195. Eastern Bluebird Sialia sialis
    # Count: 1
    Date:
    Observer: Loretta Davidson
    Location: 6045 Colorado 61, Sterling, Colorado, US (40.527, -103.01) Logan
  196. Broad-winged Hawk Buteo platypterus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  197. Least Flycatcher Empidonax minimus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  198. Carolina Wren Thryothorus ludovicianus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  199. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  200. Worm-eating Warbler Helmitheros vermivorum
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  201. Northern Waterthrush Parkesia noveboracensis
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  202. Northern Cardinal Cardinalis cardinalis
    # Count: 4
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  203. Scaled Quail Callipepla squamata
    # Count: 2
    Date:
    Observer: Matt Clark
    Location: County Road M (Cheyenne County) Cheyenne
  204. Evening Grosbeak Coccothraustes vespertinus
    # Count: 5
    Date:
    Observer: Melissa May
    Location: Spruce Drive, Durango, Colorado, US La Plata
  205. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Michael Lester
    Location: Two Buttes SWA--below dam Baca
  206. Olive-sided Flycatcher Contopus cooperi
    # Count: 1
    Date:
    Observer: Michael Lester
    Location: Two Buttes SWA--below dam Baca
  207. Canyon Wren Catherpes mexicanus
    # Count: 1
    Date:
    Observer: Michael Lester
    Location: Two Buttes SWA--below dam Baca
  208. Orchard Oriole Icterus spurius
    # Count: 6
    Date:
    Observer: Michael Lester
    Location: Two Buttes SWA--below dam Baca
  209. Blue Grosbeak Passerina caerulea
    # Count: 1
    Date:
    Observer: Michael Lester
    Location: Two Buttes SWA--below dam Baca
  210. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Caleb Alons
    Location: Terry Lake (Larimer Co.) Larimer
  211. Snowy Plover Anarhynchus nivosus
    # Count: 2
    Date:
    Observer: Ginny Bergstrom
    Location: Cheraw Lake--pond west of Hwy 109 Otero
  212. Marbled Godwit Limosa fedoa
    # Count: 1
    Date:
    Observer: Andrew Spencer
    Location: Arapaho NWR--Auto Loop Jackson
  213. Common Loon Gavia immer
    # Count: 3
    Date:
    Observer: Brenda Wright
    Location: Narraguinnep Reservoir Montezuma
  214. American Pipit Anthus rubescens
    # Count: 1
    Date:
    Observer: Andrew Spencer
    Location: Arapaho NWR--Auto Loop Jackson
  215. Horned Grebe Podiceps auritus
    # Count: 2
    Date:
    Observer: Jeff Percell
    Location: Matthew T. Glasser Reservoir Broomfield
  216. Piping Plover Charadrius melodus
    # Count: 1
    Date:
    Observer: Jacqui Geiselman
    Location: John Martin Reservoir Bent
  217. Sanderling Calidris alba
    # Count: 11
    Date:
    Observer: Mark Peterson
    Location: Patent Creek Playa, Yuma CR 58 Yuma
  218. Glossy Ibis Plegadis falcinellus
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Patent Creek Playa, Yuma CR 58 Yuma
  219. Black Phoebe Sayornis nigricans
    # Count: 1
    Date:
    Observer: Amy Davis
    Location: Watson Lake Larimer
  220. Sagebrush Sparrow Artemisiospiza nevadensis
    # Count: 1
    Date:
    Observer: Buzz Schaumberg
    Location: Empire (town) Clear Creek
  221. Rock Wren Salpinctes obsoletus
    # Count: 1
    Date:
    Observer: Jackson Trappett
    Location: V 8/10 Rd, Loma US-CO 39.35825, -108.69807 Mesa
  222. Common Goldeneye Bucephala clangula
    # Count: 3
    Date:
    Observer: Sue Riffe
    Location: Windy Gap Reservoir Grand
  223. Red-headed Woodpecker Melanerpes erythrocephalus
    # Count: 1
    Date:
    Observer: Adam Vesely
    Location: Melody Tempel Grove Bent
  224. American Redstart Setophaga ruticilla
    # Count: 1
    Date:
    Observer: Adam Vesely
    Location: Melody Tempel Grove Bent
  225. Yellow-crowned Night Heron Nyctanassa violacea
    # Count: 1
    Date:
    Observer: Peter Stoltz
    Location: First Creek at Green Valley Ranch Denver
  226. Neotropic Cormorant Nannopterum brasilianum
    # Count: 1
    Date:
    Observer: Tyler Stuart
    Location: Pikeview Reservoir El Paso
  227. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: Spencer England
    Location: Melody Tempel Grove Bent
  228. Red-breasted Merganser Mergus serrator
    # Count: 3
    Date:
    Observer: Graham Zephirin
    Location: Chatfield State Park, Littleton US-CO 39.50899, -105.07136 Douglas
  229. Chihuahuan Raven Corvus cryptoleucus
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Springfield (town) Baca
  230. American Bittern Botaurus lentiginosus
    # Count: 1
    Date:
    Observer: Aidan Coohill
    Location: Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together Boulder
  231. Summer Tanager Piranga rubra
    # Count: 1
    Date:
    Observer: Mark Minner-Lee 🦉
    Location: Walden Ponds Wildlife Habitat--Walden & Sawhill Ponds all together Boulder
  232. Brown Creeper Certhia americana
    # Count: 2
    Date:
    Observer: Ryan Votta
    Location: San Juan National Forest, Pagosa Springs US-CO (37.1403,-106.8967) Archuleta
  233. Grace's Warbler Setophaga graciae
    # Count: 1
    Date:
    Observer: Ryan Votta
    Location: San Juan National Forest, Pagosa Springs US-CO (37.1403,-106.8967) Archuleta
  234. Northern Parula Setophaga americana
    # Count: 1
    Date:
    Observer: Scott Dieni
    Location: Tucker Gulch Jefferson
  235. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Patricia Cohn
    Location: Riverbend Ponds Natural Area Larimer
  236. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Scott Rashid
    Location: Lake Estes Larimer
  237. Golden-winged Warbler Vermivora chrysoptera
    # Count: 1
    Date:
    Observer: Scott Rashid
    Location: Lake Estes Larimer
  238. Brown-capped Rosy-Finch Leucosticte australis
    # Count: 7
    Date:
    Observer: Buzz Schaumberg
    Location: The Goshawk (private, but open to public) Clear Creek
  239. Plumbeous Vireo Vireo plumbeus
    # Count: 1
    Date:
    Observer: Kathleen McGinley
    Location: Bull Basin Rd. (52 1/2 Rd.) from KE Rd. south Mesa
  240. Ladder-backed Woodpecker Dryobates scalaris
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Cottonwood Canyon (Las Animas Co.; campground and upstream to W; ~0.52 mi. on road in county) Las Animas
  241. Eastern Phoebe Sayornis phoebe
    # Count: 2
    Date:
    Observer: Norman Erthal
    Location: Cottonwood Canyon (Las Animas Co.; campground and upstream to W; ~0.52 mi. on road in county) Las Animas
  242. Juniper Titmouse Baeolophus ridgwayi
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Cottonwood Canyon (Las Animas Co.; campground and upstream to W; ~0.52 mi. on road in county) Las Animas
  243. Virginia's Warbler Leiothlypis virginiae
    # Count: 1
    Date:
    Observer: Ruth Trowbridge
    Location: 2820 Hager Lane, Glenwood Springs, Colorado, US (39.523, -107.326) Garfield
  244. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Lori Pivonka
    Location: Cozzens Lake (private property - view from road only!) Weld
  245. Band-tailed Pigeon Patagioenas fasciata
    # Count: 8
    Date:
    Observer: Richard Bunn
    Location: Hondo Avenue (Teller County) Teller
  246. Hudsonian Godwit Limosa haemastica
    # Count: 2
    Date:
    Observer: Eric DeFonso 🦑
    Location: Patent Creek Playa, Yuma CR 58 Yuma
  247. American Three-toed Woodpecker Picoides dorsalis
    # Count: 1
    Date:
    Observer: Andrew Spencer
    Location: State Forest State Park, Walden US-CO 40.56906, -105.98661 Jackson
  248. Little Blue Heron Egretta caerulea
    # Count: 1
    Date:
    Observer: Santi Tabares
    Location: Chatfield SP (Douglas Co) Douglas
  249. Williamson's Sapsucker Sphyrapicus thyroideus
    # Count: 1
    Date:
    Observer: Lisa Brin
    Location: Independence Trail Hinsdale
  250. Upland Sandpiper Bartramia longicauda
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: PHI CR 29 & 8 Phillips
  251. Common Poorwill Phalaenoptilus nuttallii
    # Count: 2
    Date:
    Observer: Keri Bowling
    Location: Golden Gate SP--Kriley Pond Gilpin
  252. Yellow-billed Cuckoo Coccyzus americanus
    # Count: 1
    Date:
    Observer: Christine Alexander
    Location: Holly Rest Area Prowers
  253. Indigo Bunting Passerina cyanea
    # Count: 1
    Date:
    Observer: Christine Alexander
    Location: Holly Rest Area Prowers
  254. Curve-billed Thrasher Toxostoma curvirostre
    # Count: 2
    Date:
    Observer: Linda Cunico
    Location: 414 S Hacienda Del Sol Dr, Pueblo West US-CO 38.32826, -104.77957 Pueblo
  255. Cassin's Sparrow Peucaea cassinii
    # Count: 1
    Date:
    Observer: Eric DeFonso 🦑
    Location: CR 45, Yuma Yuma
  256. Grasshopper Sparrow Ammodramus savannarum
    # Count: 2
    Date:
    Observer: Eric DeFonso 🦑
    Location: CR 45, Yuma Yuma
  257. Field Sparrow Spizella pusilla
    # Count: 2
    Date:
    Observer: Eric DeFonso 🦑
    Location: CR 45, Yuma Yuma
  258. Ovenbird Seiurus aurocapilla
    # Count: 1
    Date:
    Observer: Curt Frankenfeld
    Location: Spruce Mountain Open Space Douglas
  259. White-eyed Vireo Vireo griseus
    # Count: 1
    Date:
    Observer: Tyler Imfeld
    Location: Wheat Ridge Greenbelt--Prospect Park & Lake Jefferson
  260. Cackling Goose Branta hutchinsii
    # Count: 1
    Date:
    Observer: Nick Komar
    Location: Ft. Collins City Park and Sheldon Lake Larimer
  261. Black-throated Sparrow Amphispiza bilineata
    # Count: 1
    Date:
    Observer: David Darden
    Location: Colorado NM--Devil's Kitchen Trail Mesa
  262. Canyon Towhee Melozone fusca
    # Count: 1
    Date:
    Observer: Steven Olson
    Location: Picture Canyon Baca
  263. Greater Roadrunner Geococcyx californianus
    # Count: 1
    Date:
    Observer: Wolfe R
    Location: Two Buttes SWA--below dam Baca
  264. Purple Martin Progne subis
    # Count: 1
    Date:
    Observer: JoAnn Potter Riggle 🦤
    Location: Cheney Reservoir Mesa
  265. Northern Pygmy-Owl Glaucidium gnoma
    # Count: 1
    Date:
    Observer: Peggy Gonder
    Location: Lair O' the Bear Park Jefferson
  266. Great Crested Flycatcher Myiarchus crinitus
    # Count: 1
    Date:
    Observer: Eric DeFonso 🦑
    Location: Wray City Park & neighborhood Yuma
  267. Prairie Warbler Setophaga discolor
    # Count: 1
    Date:
    Observer: Colin Woolley
    Location: Chico Basin Ranch--Bell Grove (El Paso Co) (mandatory registration required at www.aikenaudubon.com) El Paso
  268. Golden-crowned Kinglet Regulus satrapa
    # Count: 1
    Date:
    Observer: Jonathan Schneider
    Location: Staunton SP (Jefferson Co) Jefferson
  269. Northern Bobwhite Colinus virginianus
    # Count: 1
    Date:
    Observer: Chris Goulart
    Location: Mike Higbee SWA Prowers
  270. Rufous-crowned Sparrow Aimophila ruficeps
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Picture Canyon Baca
  271. Pectoral Sandpiper Calidris melanotos
    # Count: 2
    Date:
    Observer: Chris Gilbert
    Location: Lake Meredith Crowley
  272. White-rumped Sandpiper Calidris fuscicollis
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Wray Fish Hatchery Yuma
  273. Chestnut-collared Longspur Calcarius ornatus
    # Count: 8
    Date:
    Observer: Lori Pivonka
    Location: Pawnee National Grassland, Nunn US-CO 40.86962, -104.60083 Weld
  274. American Goshawk Accipiter atricapillus
    # Count: 1
    Date:
    Observer: Mike Henwood
    Location: Carson Hole Area Mesa
  275. Red-bellied Woodpecker Melanerpes carolinus
    # Count: 1
    Date:
    Observer: David Trevino
    Location: Brush SWA Morgan
  276. Gray Vireo Vireo vicinior
    # Count: 1
    Date:
    Observer: Janet Gallenstein
    Location: Unaweep Seep Natural Area Mesa
  277. Herring Gull Larus argentatus
    # Count: 1
    Date:
    Observer: Loren Ahonen
    Location: Blue Mesa Reservoir--eastern portion Gunnison
  278. Golden-crowned Sparrow Zonotrichia atricapilla
    # Count: 1
    Date:
    Observer: Chris Schoenfelder
    Location: Chris Home - 38.9186x-104.7262 El Paso
  279. Sharp-tailed Grouse Tympanuchus phasianellus
    # Count: 2
    Date:
    Observer: Jason Szyba
    Location: 11655 County Road 70, Hayden US-CO 40.54302, -107.21908 Routt
  280. Red-eyed Vireo Vireo olivaceus
    # Count: 1
    Date:
    Observer: Loch Kilpatrick
    Location: Stups farm Prowers
  281. Blue-winged Warbler Vermivora cyanoptera
    # Count: 1
    Date:
    Observer: Mark Obmascik
    Location: First Creek at Green Valley Ranch Denver
  282. Western Cattle Egret Bubulcus ibis
    # Count: 5
    Date:
    Observer: Cathy Fennelly
    Location: Lake Arbor Jefferson
  283. Gray-cheeked Thrush Catharus minimus
    # Count: 1
    Date:
    Observer: Kelly Ormesher
    Location: Pawnee NG--Crow Valley CG Weld
  284. Barn Owl Tyto alba
    # Count: 1
    Date:
    Observer: Matt Clark
    Location: Hammer Ranch Cheyenne
  285. Townsend's Warbler Setophaga townsendi
    # Count: 1
    Date:
    Observer: Matt Clark
    Location: Hammer Ranch Cheyenne
  286. Black-bellied Plover Pluvialis squatarola
    # Count: 4
    Date:
    Observer: John Rawinski
    Location: Blanca Wetlands (BLM) Alamosa
  287. Yellow-throated Vireo Vireo flavifrons
    # Count: 1
    Date:
    Observer: Mary Burger
    Location: Chatfield SP (Douglas Co) Douglas
  288. Eastern Screech-Owl Megascops asio
    # Count: 2
    Date:
    Observer: Anonymous eBirder
    Location: 16132 E Colorado Ave, Aurora US-CO 39.68424, -104.79943 Arapahoe
  289. Prothonotary Warbler Protonotaria citrea
    # Count: 1
    Date:
    Observer: Chris Knight
    Location: Lake Pueblo SP--Valco Ponds Pueblo
  290. Greater Sage-Grouse Centrocercus urophasianus
    # Count: 15
    Date:
    Observer: David de Rivera Tønnessen
    Location: Coalmont area Jackson
  291. Willow Flycatcher Empidonax traillii
    # Count: 1
    Date:
    Observer: mark wagner
    Location: Dixon Reservoir Larimer
  292. Gray-crowned Rosy-Finch Leucosticte tephrocotis
    # Count: 1
    Date:
    Observer: Bryan Gieszl
    Location: Home Pitkin
  293. Black Rosy-Finch Leucosticte atrata
    # Count: 1
    Date:
    Observer: Bryan Gieszl
    Location: Home Pitkin
  294. Veery Catharus fuscescens
    # Count: 1
    Date:
    Observer: Skyler Bol
    Location: Pawnee NG--Norma's Grove Weld
  295. Chukar Alectoris chukar
    # Count: 2
    Date:
    Observer: Logan Wagner
    Location: Cameo & Coal Canyon Mesa
  296. Lucy's Warbler Leiothlypis luciae
    # Count: 3
    Date:
    Observer: Brenda Wright
    Location: Lower Yellowjacket Montezuma
  297. Black-throated Green Warbler Setophaga virens
    # Count: 1
    Date:
    Observer: David Dowell
    Location: South Republican SWA--Hale Crossroads Yuma
  298. Greater Prairie-Chicken Tympanuchus cupido
    # Count: 11
    Date:
    Observer: robert beauchamp
    Location: Playa at Sedgwick CRs 23 & 12 Sedgwick
  299. Northern Saw-whet Owl Aegolius acadicus
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Medicine Bow-Routt National Forests, Kremmling US-CO 40.35611, -106.57963 Grand
  300. Long-eared Owl Asio otus
    # Count: 1
  301. Black Rail Laterallus jamaicensis
    # Count: 1

Exotic: Provisional (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: 1
    Date:
    Observer: Ariel Kallenbach
    Location: Sandstone Ranch Weld

Exotic: Escapee (2)

  1. Mute Swan Cygnus olor
    # Count: 2
    Date:
    Observer: Lori Pivonka
    Location: “F” Street Ponds; Greeley US-CO (40.4426,-104.7529) Weld
  2. Graylag Goose Anser anser
    # Count: 2
    Date:
    Observer: Lake Watch
    Location: Denver City Park Denver

Hybrids (8)

  1. Graylag x Swan Goose (hybrid) Anser anser x cygnoides
    # Count: 1
    Date:
    Observer: Thaddeus Wells
    Location: Denver City Park Denver
  2. Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihi
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Patent Creek Playa, Yuma CR 58 Yuma
  3. Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyanea
    # Count: 1
    Date:
    Observer: Cody Ensanian
    Location: Sondermann Park El Paso
  4. Black x Eastern Phoebe (hybrid) Sayornis nigricans x phoebe
    # Count: 1
    Date:
    Observer: Santi Tabares
    Location: South Platte Park Arapahoe
  5. Graylag x Canada Goose (hybrid) Anser anser x Branta canadensis
    # Count: 1
    Date:
    Observer: Brittany Backer
    Location: Belmar Park, Lakewood US-CO 39.70495, -105.08914 Jefferson
  6. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    # Count: 1
    Date:
    Observer: Oliver Komar
    Location: Walden Reservoir Jackson
  7. Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmus
    # Count: 1
    Date:
    Observer: David Trevino
    Location: 34101–34123 County Road W7, Snyder US-CO 40.37705, -103.50087 Morgan
  8. Bullock's x Baltimore Oriole (hybrid) Icterus bullockii x galbula
    # Count: 2
    Date:
    Observer: Charles Hundertmark
    Location: Prewitt Reservoir SWA (Washington Co) Washington

Additional Taxa (75)

  1. swallow sp. Hirundinidae sp.
    # Count: 70
    Date:
    Observer: Don Marsh
    Location: Uncompahgre River at Buckhorn Rd (Ouray County Only) Ouray
  2. new world sparrow sp. Passerellidae sp.
    # Count: 1
    Date:
    Observer: Don Marsh
    Location: Uncompahgre River at Buckhorn Rd (Ouray County Only) Ouray
  3. duck sp. Anatidae (duck sp.)
    # Count: X
    Date:
    Observer: Ashton Eckerstorfer 🦆
    Location: Riverbend Ponds Natural Area Larimer
  4. shorebird sp. Charadriiformes sp.
    # Count: 6
    Date:
    Observer: Colleen Kulesza
    Location: Clear Creek Valley Park Adams
  5. hummingbird sp. Trochilidae sp.
    # Count: 1
    Date:
    Observer: Kate Parker
    Location: Lake Estes Larimer
  6. Horned/Eared Grebe Podiceps auritus/nigricollis
    # Count: 1
    Date:
    Observer: Bethany Ferguson
    Location: Belmar Park Jefferson
  7. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: 3
    Date:
    Observer: Bethany Ferguson
    Location: Belmar Park Jefferson
  8. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Kim Weber
    Location: Picket Drive & Montebello, Colorado Springs, Colorado, US (38.906, -104.789) El Paso
  9. grackle sp. Quiscalus sp.
    # Count: 35
    Date:
    Observer: Jane Stulp
    Location: Farm Yard Prowers
  10. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    # Count: 2
    Date:
    Observer: Danny Kabeya
    Location: Bear Creek Trail--South Federal Blvd. to South Platte River Arapahoe
  11. Gray/Dusky Flycatcher Empidonax wrightii/oberholseri
    # Count: 1
    Date:
    Observer: Chipper Phillips
    Location: Interlocken--Central Park Broomfield
  12. wren sp. Troglodytidae sp.
    # Count: 1
    Date:
    Observer: Erik Hendrickson
    Location: 10929 County Road 44, Mancos, Colorado, US (37.371, -108.24) Montezuma
  13. peep sp. Calidris sp. (peep sp.)
    # Count: 1
    Date:
    Observer: Matt Hofeditz
    Location: Lake Hasty (lake and campground) Bent
  14. Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus
    # Count: 2
    Date:
    Observer: Mindy Mueller
    Location: Quincy Reservoir Arapahoe
  15. Empidonax sp. Empidonax sp.
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  16. raven sp. Corvus sp. (raven sp.)
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Lamar Community College Prowers
  17. blackbird sp. Icteridae sp.
    # Count: 10
    Date:
    Observer: Jeff Percell
    Location: Plaster Reservoir Broomfield
  18. pigeon/dove sp. Columbidae sp.
    # Count: 2
    Date:
    Observer: Jeff Percell
    Location: Matthew T. Glasser Reservoir Broomfield
  19. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Patent Creek Playa, Yuma CR 58 Yuma
  20. Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.
    # Count: 5
    Date:
    Observer: Doug Schoch
    Location: Cherry Creek SP Arapahoe
  21. Larus sp. Larus sp.
    # Count: 1
    Date:
    Observer: David de Rivera Tønnessen
    Location: South Delaney Lake Jackson
  22. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Diane Birks
    Location: Union Reservoir Weld
  23. falcon sp. Falco sp.
    # Count: 1
    Date:
    Observer: Peter Stoltz
    Location: First Creek at Green Valley Ranch Denver
  24. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 1
    Date:
    Observer: Lake Watch
    Location: Denver City Park Denver
  25. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 1
    Date:
    Observer: Barbara Baring
    Location: Weld CR 41 from CR 46 to 48 (private; view from road) Weld
  26. gull sp. Larinae sp.
    # Count: 35
    Date:
    Observer: Lisa Brin
    Location: Blue Mesa Reservoir--eastern portion Gunnison
  27. Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseri
    # Count: 1
    Date:
    Observer: Cody Ensanian
    Location: Sondermann Park El Paso
  28. Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
    # Count: 3
    Date:
    Observer: Bob Muckle
    Location: Lagerman Agricultural Preserve--Lagerman Reservoir Boulder
  29. crow/raven sp. Corvus sp.
    # Count: 1
    Date:
    Observer: Jeff Percell
    Location: Anthem Ranch Ponds Broomfield
  30. Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
    # Count: 2
    Date:
    Observer: mark wagner
    Location: Running Deer & Cottonwood Hollow Natural Areas Larimer
  31. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 10
    Date:
    Observer: Jamey Hastings
    Location: Eleven Mile SP Park
  32. Accipiter sp. Accipiter sp.
    # Count: 1
    Date:
    Observer: Carol Bylsma
    Location: 28550 County Road T5, Dolores US-CO 37.45898, -108.52626 Montezuma
  33. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    # Count: 2
    Date:
    Observer: Mark Peterson
    Location: PHI CR 31 between 14 And 10 Phillips
  34. new world warbler sp. Parulidae sp.
    # Count: 1
    Date:
    Observer: Jackson Trappett
    Location: V 8/10 Rd, Loma US-CO 39.35728, -108.71053 Mesa
  35. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    # Count: 24
    Date:
    Observer: Nancy Eckardt
    Location: Fossil Creek Reservoir Natural Area--West Blind Larimer
  36. sapsucker sp. Sphyrapicus sp.
    # Count: 1
    Date:
    Observer: Lisa Brin
    Location: Independence Trail Hinsdale
  37. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    # Count: 2
    Date:
    Observer: Anonymous eBirder
    Location: Sweitzer Lake SP Delta
  38. Streptopelia sp. Streptopelia sp.
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Waneka Lake/Greenlee Preserve--Greenlee Only Boulder
  39. passerine sp. Passeriformes sp.
    # Count: 5
    Date:
    Observer: Ted Floyd
    Location: Waneka Lake/Greenlee Preserve--Greenlee Only Boulder
  40. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    # Count: 1
    Date:
    Observer: Rhonda & Leonard Horwitz-Romano
    Location: 466 Coyote Cir, Black Hawk US-CO 39.83264, -105.48690 Gilpin
  41. nuthatch sp. Sitta sp.
    # Count: 2
    Date:
    Observer: Rhonda & Leonard Horwitz-Romano
    Location: 466 Coyote Cir, Black Hawk US-CO 39.83264, -105.48690 Gilpin
  42. Bullock's/Baltimore Oriole Icterus bullockii/galbula
    # Count: 1
    Date:
    Observer: Amy H
    Location: Platteville Weld
  43. Haemorhous sp. Haemorhous sp.
    # Count: 1
    Date:
    Observer: Leah Waldner
    Location: 4307–4345 45 Rd, De Beque US-CO 39.36385, -108.24971 Mesa
  44. woodpecker sp. Picidae sp.
    # Count: 1
    Date:
    Observer: Mike Henwood
    Location: Divide Road--Telephone Trail to Uranium Road #404 Mesa
  45. phalarope sp. Phalaropus sp.
    # Count: 30
    Date:
    Observer: David de Rivera Tønnessen
    Location: Arapaho NWR--Auto Loop Jackson
  46. yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)
    # Count: 2
    Date:
    Observer: Tricia Lewis
    Location: Cherry Creek Trail--Bayou Gulch Rd to Stroh Rd Douglas
  47. new world oriole sp. Icterus sp.
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Wray Fish Hatchery Yuma
  48. owl sp. Strigiformes sp.
    # Count: 1
    Date:
    Observer: Isiah Newbins
    Location: Plains Conservation Center, Aurora US-CO 39.65662, -104.73613 Arapahoe
  49. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: 80011, Aurora US-CO 39.73843, -104.77736 Arapahoe
  50. Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violacea
    # Count: 1
    Date:
    Observer: Fiona Lien
    Location: First Creek at Green Valley Ranch Denver
  51. eagle sp. Accipitridae sp. (eagle sp.)
    # Count: 2
    Date:
    Observer: Kim Weber
    Location: Memorial Park & Prospect Lake El Paso
  52. Passerina sp. Passerina sp.
    # Count: 2
    Date:
    Observer: Matt Gray
    Location: Colorado NM--Devil's Kitchen Trail Mesa
  53. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    # Count: 2
    Date:
    Observer: Annie Reeves
    Location: Animas River--Santa Rita Park area La Plata
  54. vireo sp. Vireo sp.
    # Count: 1
    Date:
    Observer: Annie Reeves
    Location: Animas River--Santa Rita Park area La Plata
  55. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    # Count: 1
    Date:
    Observer: Gigi Zarzuela
    Location: Roxborough SP Douglas
  56. Sedge/Marsh Wren Cistothorus stellaris/palustris
    # Count: 2
    Date:
    Observer: Dani Flores
    Location: Fossil Creek Reservoir Natural Area--West Blind Larimer
  57. new world flycatcher sp. Tyrannidae sp.
    # Count: 4
    Date:
    Observer: Ron Bolton
    Location: Pawnee NG--Crow Valley CG Weld
  58. Spizella sp. Spizella sp.
    # Count: 5
    Date:
    Observer: David Dowell
    Location: South Republican SWA--Foster Grove Yuma
  59. Common/Red-breasted Merganser Mergus merganser/serrator
    # Count: 1
    Date:
    Observer: Joe Lowe
    Location: Oxbow Natural Area Larimer
  60. Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalus
    # Count: 1
    Date:
    Observer: Katy Garon
    Location: Washington Park Denver
  61. finch sp. Fringillidae sp.
    # Count: 2
    Date:
    Observer: Anonymous eBirder
    Location: BVHS Nature Area Trail & Marquard Nature Area Chaffee
  62. tanager sp. (Piranga sp.) Piranga sp.
    # Count: 1
    Date:
    Observer: Chris Goulart
    Location: Lamar Community College, Lamar US-CO 38.07042, -102.61590 Prowers
  63. heron sp. Ardeidae sp.
    # Count: 1
    Date:
    Observer: Forrest Luke
    Location: CR-184, Craig US-CO 40.49573, -107.53585 Moffat
  64. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 15
    Date:
    Observer: Ted Floyd
    Location: Teller Lake Boulder
  65. Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandri
    # Count: 2
    Date:
    Observer: Al Kaltenback
    Location: dawsonrd Douglas
  66. towhee sp. Melozone/Pipilo sp.
    # Count: 2
    Date:
    Observer: Sydney McBrayer
    Location: home Pitkin
  67. teal sp. Anatidae sp. (teal sp.)
    # Count: 1
    Date:
    Observer: Brett Walker
    Location: Horsethief Canyon SWA Mesa
  68. goose sp. Anatidae (goose sp.)
    # Count: 5
    Date:
    Observer: Anonymous eBirder
    Location: Confluence Park (Delta) Delta
  69. Lincoln's/Swamp Sparrow Melospiza lincolnii/georgiana
    # Count: 1
    Date:
    Observer: Karen Smith
    Location: Wheat Ridge Greenbelt Jefferson
  70. large falcon sp. Falco sp. (large falcon sp.)
    # Count: 1
    Date:
    Observer: Tyler Stuart
    Location: Fountain Creek Regional Park--Willow Spring Rd. area El Paso
  71. Catharus sp. Catharus sp.
    # Count: 2
    Date:
    Observer: Thaddeus Wells
    Location: Barr Lake SP Adams
  72. thrush sp. Turdidae sp.
    # Count: 2
    Date:
    Observer: Denver Field Ornithologists
    Location: Barr Lake SP Adams
  73. rosy-finch sp. Leucosticte sp.
    # Count: 60
    Date:
    Observer: Bryan Gieszl
    Location: Home Pitkin
  74. Setophaga sp. Setophaga sp.
    # Count: 1
    Date:
    Observer: jim wood
    Location: 13967–13975 SH-347, Montrose US-CO 38.48929, -107.74071 Montrose
  75. Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
    # Count: 4
    Date:
    Observer: Eric Spink
    Location: Sands Lake SWA Chaffee