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Bird List

Updated ~10 seconds ago
261 All Years 98 This Year 2024 25 This Month Jun 2024
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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (260)

  1. Cackling Goose Branta hutchinsii
    # Count: 225
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  2. Canvasback Aythya valisineria
    # Count: 75
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  3. Mountain Bluebird Sialia currucoides
    # Count: 75
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  4. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 75
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  5. Scaled Quail Callipepla squamata
    # Count: 40
    Date:
    Observer: Robin Carter
    Location: Two Buttes Reservoir
  6. Rock Pigeon Columba livia
    # Count: 40
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  7. House Sparrow Passer domesticus
    # Count: 25
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  8. Song Sparrow Melospiza melodia
    # Count: 20
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  9. Common Grackle Quiscalus quiscula
    # Count: 19
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  10. Common Merganser Mergus merganser
    # Count: 12
    Date:
    Observer: Marshall Iliff
    Location: Two Buttes Reservoir
  11. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 12
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  12. Chipping Sparrow Spizella passerina
    # Count: 12
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  13. Redhead Aythya americana
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  14. American Avocet Recurvirostra americana
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  15. Pinyon Jay Gymnorhinus cyanocephalus
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  16. European Starling Sturnus vulgaris
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  17. Western Meadowlark Sturnella neglecta
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  18. Red-winged Blackbird Agelaius phoeniceus
    # Count: 10
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  19. Snow Goose Anser caerulescens
    # Count: 8
    Date:
    Observer: David Ely
    Location: Two Buttes Reservoir
  20. Northern Flicker Colaptes auratus
    # Count: 8
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  21. American Robin Turdus migratorius
    # Count: 8
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  22. Red Crossbill Loxia curvirostra
    # Count: 7
    Date:
    Observer: Glenn Walbek
    Location: Two Buttes Reservoir
  23. Lapland Longspur Calcarius lapponicus
    # Count: 7
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  24. Dark-eyed Junco Junco hyemalis
    # Count: 7
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  25. White-throated Sparrow Zonotrichia albicollis
    # Count: 7
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  26. Ruddy Duck Oxyura jamaicensis
    # Count: 6
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  27. Mourning Dove Zenaida macroura
    # Count: 6
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  28. Northern Shoveler Spatula clypeata
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  29. Ring-necked Duck Aythya collaris
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  30. Hooded Merganser Lophodytes cucullatus
    # Count: 5
    Date:
    Observer: matt newport
    Location: Two Buttes Reservoir
  31. Western Grebe Aechmophorus occidentalis
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  32. American Coot Fulica americana
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  33. Upland Sandpiper Bartramia longicauda
    # Count: 5
    Date:
    Observer: Glenn Walbek
    Location: Two Buttes Reservoir
  34. Black Tern Chlidonias niger
    # Count: 5
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  35. Turkey Vulture Cathartes aura
    # Count: 5
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  36. Northern Harrier Circus hudsonius
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  37. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 5
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  38. Golden-crowned Kinglet Regulus satrapa
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  39. Marsh Wren Cistothorus palustris
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  40. Bewick's Wren Thryomanes bewickii
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  41. Lincoln's Sparrow Melospiza lincolnii
    # Count: 5
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  42. Gadwall Mareca strepera
    # Count: 4
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  43. Common Goldeneye Bucephala clangula
    # Count: 4
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  44. Red-necked Phalarope Phalaropus lobatus
    # Count: 4
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  45. Say's Phoebe Sayornis saya
    # Count: 4
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  46. Lark Sparrow Chondestes grammacus
    # Count: 4
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  47. Brown-headed Cowbird Molothrus ater
    # Count: 4
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  48. Yellow-rumped Warbler Setophaga coronata
    # Count: 4
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  49. Red-breasted Merganser Mergus serrator
    # Count: 3
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  50. Eared Grebe Podiceps nigricollis
    # Count: 3
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  51. Stilt Sandpiper Calidris himantopus
    # Count: 3
    Date:
    Observer: Dan Brooke
    Location: Two Buttes Reservoir
  52. Franklin's Gull Leucophaeus pipixcan
    # Count: 3
    Date:
    Observer: Guy Kirwan
    Location: Two Buttes Reservoir
  53. Ring-billed Gull Larus delawarensis
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  54. Tree Swallow Tachycineta bicolor
    # Count: 3
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  55. Eastern Bluebird Sialia sialis
    # Count: 3
    Date:
    Observer: Steve Shultz
    Location: Two Buttes Reservoir
  56. Cedar Waxwing Bombycilla cedrorum
    # Count: 3
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  57. Evening Grosbeak Coccothraustes vespertinus
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  58. House Finch Haemorhous mexicanus
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  59. American Tree Sparrow Spizelloides arborea
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  60. Harris's Sparrow Zonotrichia querula
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  61. Vesper Sparrow Pooecetes gramineus
    # Count: 3
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  62. Swamp Sparrow Melospiza georgiana
    # Count: 3
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  63. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 3
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes Reservoir
  64. Wood Duck Aix sponsa
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  65. Mallard Anas platyrhynchos
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  66. Green-winged Teal Anas crecca
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  67. Greater Scaup Aythya marila
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  68. Clark's Grebe Aechmophorus clarkii
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  69. Virginia Rail Rallus limicola
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  70. Western Cattle Egret Bubulcus ibis
    # Count: 2
    Date:
    Observer: Scott Shaum
    Location: Two Buttes Reservoir
  71. Red-tailed Hawk Buteo jamaicensis
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  72. Barn Owl Tyto alba
    # Count: 2
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  73. Western Screech-Owl Megascops kennicottii
    # Count: 2
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  74. Great Horned Owl Bubo virginianus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  75. Belted Kingfisher Megaceryle alcyon
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  76. Downy Woodpecker Dryobates pubescens
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  77. Ladder-backed Woodpecker Dryobates scalaris
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  78. Eastern Phoebe Sayornis phoebe
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  79. Cassin's Kingbird Tyrannus vociferans
    # Count: 2
    Date:
    Observer: Robin Carter
    Location: Two Buttes Reservoir
  80. Woodhouse's Scrub-Jay Aphelocoma woodhouseii
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  81. American Crow Corvus brachyrhynchos
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  82. Black-capped Chickadee Poecile atricapillus
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  83. Barn Swallow Hirundo rustica
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  84. Rock Wren Salpinctes obsoletus
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  85. Canyon Wren Catherpes mexicanus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  86. American Pipit Anthus rubescens
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  87. American Goldfinch Spinus tristis
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  88. Chestnut-collared Longspur Calcarius ornatus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  89. Thick-billed Longspur Rhynchophanes mccownii
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  90. Canyon Towhee Melozone fusca
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  91. Spotted Towhee Pipilo maculatus
    # Count: 2
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  92. Yellow-breasted Chat Icteria virens
    # Count: 2
    Date:
    Observer: Jim Malcom
    Location: Two Buttes Reservoir
  93. Orchard Oriole Icterus spurius
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  94. Common Yellowthroat Geothlypis trichas
    # Count: 2
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  95. Dickcissel Spiza americana
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  96. Trumpeter Swan Cygnus buccinator
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Two Buttes Reservoir
  97. American Wigeon Mareca americana
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  98. Mexican Duck Anas diazi
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  99. Lesser Scaup Aythya affinis
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  100. Yellow-billed Cuckoo Coccyzus americanus
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  101. Sora Porzana carolina
    # Count: 1
    Date:
    Observer: Robin Carter
    Location: Two Buttes Reservoir
  102. Black-necked Stilt Himantopus mexicanus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  103. Black-bellied Plover Pluvialis squatarola
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes Reservoir
  104. American Golden-Plover Pluvialis dominica
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Two Buttes Reservoir
  105. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  106. Semipalmated Plover Charadrius semipalmatus
    # Count: 1
    Date:
    Observer: Tony Leukering
    Location: Two Buttes Reservoir
  107. Long-billed Curlew Numenius americanus
    # Count: 1
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  108. Short-billed Dowitcher Limnodromus griseus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  109. Wilson's Snipe Gallinago delicata
    # Count: 1
    Date:
    Observer: Steve Shultz
    Location: Two Buttes Reservoir
  110. Red Phalarope Phalaropus fulicarius
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  111. Lesser Yellowlegs Tringa flavipes
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  112. Sanderling Calidris alba
    # Count: 1
    Date:
    Observer: Tony Leukering
    Location: Two Buttes Reservoir
  113. Pectoral Sandpiper Calidris melanotos
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Two Buttes Reservoir
  114. Western Sandpiper Calidris mauri
    # Count: 1
    Date:
    Observer: Steve Shultz
    Location: Two Buttes Reservoir
  115. Semipalmated Sandpiper Calidris pusilla
    # Count: 1
    Date:
    Observer: Steve Shultz
    Location: Two Buttes Reservoir
  116. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  117. Short-billed Gull Larus brachyrhynchus
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  118. Caspian Tern Hydroprogne caspia
    # Count: 1
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes Reservoir
  119. Common Tern Sterna hirundo
    # Count: 1
    Date:
    Observer: Tony Leukering
    Location: Two Buttes Reservoir
  120. Common Loon Gavia immer
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  121. American Bittern Botaurus lentiginosus
    # Count: 1
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  122. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Randy Yuen
    Location: Two Buttes Reservoir
  123. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  124. Golden Eagle Aquila chrysaetos
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  125. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  126. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  127. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  128. Rough-legged Hawk Buteo lagopus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  129. Ferruginous Hawk Buteo regalis
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  130. Yellow-bellied Sapsucker Sphyrapicus varius
    # Count: 1
    Date:
    Observer: Jeremy Alcorn
    Location: Two Buttes Reservoir
  131. Red-headed Woodpecker Melanerpes erythrocephalus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  132. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Wim Heylen
    Location: Two Buttes Reservoir
  133. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  134. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  135. Prairie Falcon Falco mexicanus
    # Count: 1
    Date:
    Observer: Ed Kwater
    Location: Two Buttes Reservoir
  136. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Jim Malcom
    Location: Two Buttes Reservoir
  137. Least Flycatcher Empidonax minimus
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  138. Ash-throated Flycatcher Myiarchus cinerascens
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  139. Plumbeous Vireo Vireo plumbeus
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  140. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Marshall Iliff
    Location: Two Buttes Reservoir
  141. Northern Shrike Lanius borealis
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  142. Blue Jay Cyanocitta cristata
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  143. Black-billed Magpie Pica hudsonia
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  144. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  145. Mountain Chickadee Poecile gambeli
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  146. Horned Lark Eremophila alpestris
    # Count: 1
    Date:
    Observer: Dan Tallman
    Location: Two Buttes Reservoir
  147. Bank Swallow Riparia riparia
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  148. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  149. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  150. Red-breasted Nuthatch Sitta canadensis
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  151. Brown Creeper Certhia americana
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  152. House Wren Troglodytes aedon
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  153. Brown Thrasher Toxostoma rufum
    # Count: 1
    Date:
    Observer: Alexander Brown
    Location: Two Buttes Reservoir
  154. Sage Thrasher Oreoscoptes montanus
    # Count: 1
    Date:
    Observer: Jon Horn
    Location: Two Buttes Reservoir
  155. Northern Mockingbird Mimus polyglottos
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  156. Townsend's Solitaire Myadestes townsendi
    # Count: 1
    Date:
    Observer: David Ely
    Location: Two Buttes Reservoir
  157. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Marshall Iliff
    Location: Two Buttes Reservoir
  158. Cassin's Finch Haemorhous cassinii
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  159. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  160. Cassin's Sparrow Peucaea cassinii
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  161. Grasshopper Sparrow Ammodramus savannarum
    # Count: 1
    Date:
    Observer: Randy Yuen
    Location: Two Buttes Reservoir
  162. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  163. Baltimore Oriole Icterus galbula
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  164. Great-tailed Grackle Quiscalus mexicanus
    # Count: 1
    Date:
    Observer: Guy Kirwan
    Location: Two Buttes Reservoir
  165. Worm-eating Warbler Helmitheros vermivorum
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Two Buttes Reservoir
  166. Black-and-white Warbler Mniotilta varia
    # Count: 1
    Date:
    Observer: Joey Kellner
    Location: Two Buttes Reservoir
  167. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  168. Hooded Warbler Setophaga citrina
    # Count: 1
    Date:
    Observer: Marshall Iliff
    Location: Two Buttes Reservoir
  169. American Redstart Setophaga ruticilla
    # Count: 1
    Date:
    Observer: Randy Yuen
    Location: Two Buttes Reservoir
  170. Canada Warbler Cardellina canadensis
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Two Buttes Reservoir
  171. Scarlet Tanager Piranga olivacea
    # Count: 1
    Date:
    Observer: Colorado Bird Records Committee
    Location: Two Buttes Reservoir
  172. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Randy Yuen
    Location: Two Buttes Reservoir
  173. Northern Cardinal Cardinalis cardinalis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Two Buttes Reservoir
  174. Rose-breasted Grosbeak Pheucticus ludovicianus
    # Count: 1
    Date:
    Observer: Randy Yuen
    Location: Two Buttes Reservoir
  175. Indigo Bunting Passerina cyanea
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  176. Ross's Goose Anser rossii
    # Count: X
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  177. Canada Goose Branta canadensis
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  178. Blue-winged Teal Spatula discors
    # Count: X
    Date:
    Observer: David Guertin
    Location: Two Buttes Reservoir
  179. Cinnamon Teal Spatula cyanoptera
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  180. Northern Pintail Anas acuta
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  181. Bufflehead Bucephala albeola
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  182. Northern Bobwhite Colinus virginianus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  183. Wild Turkey Meleagris gallopavo
    # Count: X
    Date:
    Observer: Guy Kirwan
    Location: Two Buttes Reservoir
  184. Pied-billed Grebe Podilymbus podiceps
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  185. Horned Grebe Podiceps auritus
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  186. Eurasian Collared-Dove Streptopelia decaocto
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  187. Greater Roadrunner Geococcyx californianus
    # Count: X
    Date:
    Observer: Thomas Kihn
    Location: Two Buttes Reservoir
  188. Common Nighthawk Chordeiles minor
    # Count: X
    Date:
    Observer: David Guertin
    Location: Two Buttes Reservoir
  189. Common Poorwill Phalaenoptilus nuttallii
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  190. Chimney Swift Chaetura pelagica
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  191. Black-chinned Hummingbird Archilochus alexandri
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  192. Sandhill Crane Antigone canadensis
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  193. Mountain Plover Anarhynchus montanus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  194. Marbled Godwit Limosa fedoa
    # Count: X
    Date:
    Observer: Walter Harmon
    Location: Two Buttes Reservoir
  195. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  196. Wilson's Phalarope Phalaropus tricolor
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  197. Spotted Sandpiper Actitis macularius
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  198. Solitary Sandpiper Tringa solitaria
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  199. Willet Tringa semipalmata
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  200. Greater Yellowlegs Tringa melanoleuca
    # Count: X
    Date:
    Observer: David Guertin
    Location: Two Buttes Reservoir
  201. Baird's Sandpiper Calidris bairdii
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  202. Least Sandpiper Calidris minutilla
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  203. Forster's Tern Sterna forsteri
    # Count: X
    Date:
    Observer: Walter Harmon
    Location: Two Buttes Reservoir
  204. Double-crested Cormorant Nannopterum auritum
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  205. American White Pelican Pelecanus erythrorhynchos
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  206. Black-crowned Night Heron Nycticorax nycticorax
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  207. Snowy Egret Egretta thula
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  208. Great Egret Ardea alba
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  209. White-faced Ibis Plegadis chihi
    # Count: X
    Date:
    Observer: Guy Kirwan
    Location: Two Buttes Reservoir
  210. Osprey Pandion haliaetus
    # Count: X
    Date:
    Observer: Thomas Kihn
    Location: Two Buttes Reservoir
  211. Mississippi Kite Ictinia mississippiensis
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  212. Bald Eagle Haliaeetus leucocephalus
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  213. Broad-winged Hawk Buteo platypterus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  214. Burrowing Owl Athene cunicularia
    # Count: X
    Date:
    Observer: Guy Kirwan
    Location: Two Buttes Reservoir
  215. Red-bellied Woodpecker Melanerpes carolinus
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  216. Peregrine Falcon Falco peregrinus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  217. Olive-sided Flycatcher Contopus cooperi
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  218. Willow Flycatcher Empidonax traillii
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  219. Western Kingbird Tyrannus verticalis
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  220. Eastern Kingbird Tyrannus tyrannus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  221. White-eyed Vireo Vireo griseus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  222. Blue-headed Vireo Vireo solitarius
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  223. Philadelphia Vireo Vireo philadelphicus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  224. Loggerhead Shrike Lanius ludovicianus
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  225. Chihuahuan Raven Corvus cryptoleucus
    # Count: X
    Date:
    Observer: Jonathan Bowser
    Location: Two Buttes Reservoir
  226. Bushtit Psaltriparus minimus
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  227. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  228. Gray Catbird Dumetella carolinensis
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  229. Curve-billed Thrasher Toxostoma curvirostre
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  230. Veery Catharus fuscescens
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  231. Swainson's Thrush Catharus ustulatus
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  232. Wood Thrush Hylocichla mustelina
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  233. Lesser Goldfinch Spinus psaltria
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  234. Clay-colored Sparrow Spizella pallida
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  235. Field Sparrow Spizella pusilla
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  236. Brewer's Sparrow Spizella breweri
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  237. Lark Bunting Calamospiza melanocorys
    # Count: X
    Date:
    Observer: David Ely
    Location: Two Buttes Reservoir
  238. Savannah Sparrow Passerculus sandwichensis
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  239. Rufous-crowned Sparrow Aimophila ruficeps
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  240. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  241. Bullock's Oriole Icterus bullockii
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  242. Ovenbird Seiurus aurocapilla
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  243. Northern Waterthrush Parkesia noveboracensis
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  244. Tennessee Warbler Leiothlypis peregrina
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  245. Nashville Warbler Leiothlypis ruficapilla
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  246. Virginia's Warbler Leiothlypis virginiae
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  247. MacGillivray's Warbler Geothlypis tolmiei
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  248. Cape May Warbler Setophaga tigrina
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  249. Northern Parula Setophaga americana
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  250. Blackburnian Warbler Setophaga fusca
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  251. Yellow Warbler Setophaga petechia
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  252. Chestnut-sided Warbler Setophaga pensylvanica
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir
  253. Blackpoll Warbler Setophaga striata
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  254. Black-throated Blue Warbler Setophaga caerulescens
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  255. Palm Warbler Setophaga palmarum
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  256. Townsend's Warbler Setophaga townsendi
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  257. Wilson's Warbler Cardellina pusilla
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir
  258. Summer Tanager Piranga rubra
    # Count: X
    Date:
    Observer: Ric Olson
    Location: Two Buttes Reservoir
  259. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: X
    Date:
    Observer: James Beatty
    Location: Two Buttes Reservoir
  260. Blue Grosbeak Passerina caerulea
    # Count: X
    Date:
    Observer: Randall Siebert
    Location: Two Buttes Reservoir

Exotic: Provisional (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: X
    Date:
    Observer: David Guertin
    Location: Two Buttes Reservoir

Additional Taxa (19)

  1. duck sp. Anatidae (duck sp.)
    # Count: 400
    Date:
    Observer: Van Remsen
    Location: Two Buttes Reservoir
  2. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 40
    Date:
    Observer: David Suddjian
    Location: Two Buttes Reservoir
  3. shorebird sp. Charadriiformes sp.
    # Count: 20
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes Reservoir
  4. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    # Count: 16
    Date:
    Observer: Gary Koehn
    Location: Two Buttes Reservoir
  5. peep sp. Calidris sp. (peep sp.)
    # Count: 15
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  6. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 14
    Date:
    Observer: David Dowell
    Location: Two Buttes Reservoir
  7. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 10
    Date:
    Observer: David Wolf
    Location: Two Buttes Reservoir
  8. swallow sp. Hirundinidae sp.
    # Count: 10
    Date:
    Observer: Nathan Pieplow
    Location: Two Buttes Reservoir
  9. Spizella sp. Spizella sp.
    # Count: 10
    Date:
    Observer: David Suddjian
    Location: Two Buttes Reservoir
  10. tern sp. Sterninae sp.
    # Count: 8
    Date:
    Observer: Kathy Mihm Dunning
    Location: Two Buttes Reservoir
  11. teal sp. Anatidae sp. (teal sp.)
    # Count: 7
    Date:
    Observer: Tony Leukering
    Location: Two Buttes Reservoir
  12. new world sparrow sp. Passerellidae sp.
    # Count: 6
    Date:
    Observer: David Suddjian
    Location: Two Buttes Reservoir
  13. raven sp. Corvus sp. (raven sp.)
    # Count: 3
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  14. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    # Count: 2
    Date:
    Observer: Justyn Foth
    Location: Two Buttes Reservoir
  15. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Two Buttes Reservoir
  16. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    # Count: 1
    Date:
    Observer: Mark Peterson
    Location: Two Buttes Reservoir
  17. towhee sp. Melozone/Pipilo sp.
    # Count: 1
    Date:
    Observer: Diane Roberts
    Location: Two Buttes Reservoir
  18. passerine sp. Passeriformes sp.
    # Count: 1
    Date:
    Observer: Chelsea Weithman
    Location: Two Buttes Reservoir
  19. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: X
    Date:
    Observer: Laurens Halsey
    Location: Two Buttes Reservoir