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Illustrated Checklist

 Powered by Macaulay Library and eBird
Updated ~21 seconds ago

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255 Species Observed
Species w/ Photos
Species w/ Audio
Species Needing Photos
Species Needing Audio
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Native and Naturalized (254)

  1. Last observed by Ira Sanders on 13 Sep 2017
  2. Last observed by Zachary Kaiser on 29 Sep 2023
  3. Last observed by Emily C on 10 Sep 2023
  4. Last observed by Thomas Heinrich on 18 Sep 2023
  5. Last observed by Nick Moore on 14 Sep 2022
  6. Last observed by Bradley Richardson on 24 Sep 2023
  7. Last observed by Bradley Richardson on 24 Sep 2023
  8. Last observed by L Pera on 24 Sep 2023
  9. Last observed by Elaine Hendricks on 27 Sep 2023
  10. Last observed by Thomas Heinrich on 18 Sep 2023
  11. Last observed by L Pera on 24 Sep 2023
  12. Last observed by Norm Lewis on 15 Sep 2001
  13. Last observed by Norm Lewis on 18 Sep 2023
  14. Last observed by Norm Lewis on 30 Sep 2020
  15. Last observed by Ronda Woodward on 12 Sep 1993
  16. Last observed by Kimball Garrett on 24 Sep 2006
  17. Last observed by Glenn Walbek on 27 Sep 2020
  18. Last observed by Cole Sage on 10 Sep 2023
  19. Last observed by Elaine Hendricks on 27 Sep 2023
  20. Last observed by Dan Mackesy on 24 Sep 2023
  21. Last observed by Randall Siebert on 11 Sep 2004
  22. Last observed by Chris Gilbert on 2 Sep 2023
  23. Last observed by Tyler Wilson on 12 Sep 2023
  24. Last observed by Elaine Hendricks on 27 Sep 2023
  25. Last observed by Dan Mackesy on 23 Sep 2023
  26. Last observed by Matt Hofeditz on 17 Sep 2023
  27. Last observed by Dan Mackesy on 24 Sep 2023
  28. Last observed by David Dowell on 13 Sep 2018
  29. Last observed by Zachary Kaiser on 29 Sep 2023
  30. Last observed by John C Breitsch on 14 Sep 2013
  31. Last observed by Loch Kilpatrick on 11 Sep 2023
  32. Last observed by Glenn Walbek on 13 Sep 2005
  33. Last observed by Amy Darling on 10 Sep 2013
  34. Last observed by Luke Pheneger on 9 Sep 2023
  35. Last observed by Daniel Maynard on 1 Sep 2016
  36. Last observed by Cathy Sheeter on 2 Sep 2020
  37. Last observed by Wes Donnell on 16 Sep 2023
  38. Last observed by Mark Minner-Lee 🦉 on 10 Sep 2016
  39. Last observed by John Haycraft on 7 Sep 2020
  40. Last observed by Elaine Hendricks on 27 Sep 2023
  41. Last observed by Luke Pheneger on 27 Sep 2022
  42. Last observed by Torrance Wells on 23 Sep 2022
  43. Last observed by Bradley Richardson on 24 Sep 2023
  44. Last observed by Wes Donnell on 16 Sep 2023
  45. Last observed by Alicia Arnold 🦩 on 30 Sep 2019
  46. Last observed by Zachary Kaiser on 29 Sep 2023
  47. Last observed by L Pera on 24 Sep 2023
  48. Last observed by Felice Lyons on 19 Sep 2021
  49. Last observed by Chris Chappell on 5 Sep 2022
  50. Last observed by Felice Lyons on 14 Sep 2022
  51. Last observed by Cathy Sheeter on 17 Sep 2014
  52. Last observed by L Pera on 24 Sep 2023
  53. Last observed by Thomas Heinrich on 18 Sep 2023
  54. Last observed by Emily C on 10 Sep 2023
  55. Last observed by Loch Kilpatrick on 11 Sep 2002
  56. Last observed by Kathryn Kay on 10 Sep 2023
  57. Last observed by L Pera on 24 Sep 2023
  58. Last observed by Gigi Zarzuela on 17 Sep 2023
  59. Last observed by Zachary Kaiser on 29 Sep 2023
  60. Last observed by Felice Lyons on 7 Sep 2020
  61. Last observed by L Pera on 24 Sep 2023
  62. Last observed by Randall Siebert on 2 Sep 2005
  63. Last observed by Hugh Kingery on 13 Sep 1987
  64. Last observed by Wes Donnell on 11 Sep 2023
  65. Last observed by Wes Donnell on 16 Sep 2023
  66. Last observed by Eric DeFonso 🦑 on 10 Sep 2023
  67. Last observed by Ben Lagasse on 23 Sep 2017
  68. Last observed by Thomas Heinrich on 18 Sep 2023
  69. Last observed by L Pera on 24 Sep 2023
  70. Last observed by Wes Donnell on 11 Sep 2023
  71. Last observed by Betty Glass on 1 Sep 2021
  72. Last observed by Loch Kilpatrick on 11 Sep 2023
  73. Last observed by Hugh Kingery on 14 Sep 1995
  74. Last observed by Doug Faulkner on 7 Sep 2020
  75. Last observed by Rachel Kolokoff Hopper on 16 Sep 1998
  76. Last observed by Roger Mattson on 22 Sep 2023
  77. Last observed by Nick Moore on 11 Sep 2011
  78. Last observed by Elaine Hendricks on 27 Sep 2023
  79. Last observed by Zachary Kaiser on 29 Sep 2023
  80. Last observed by L Pera on 24 Sep 2023
  81. Last observed by L Pera on 24 Sep 2023
  82. Last observed by L Pera on 24 Sep 2023
  83. Last observed by Meg Reck on 12 Sep 2023
  84. Last observed by Roger Mattson on 22 Sep 2023
  85. Last observed by Loch Kilpatrick on 11 Sep 2023
  86. Last observed by Loch Kilpatrick on 11 Sep 2023
  87. Last observed by David Dowell on 13 Sep 2018
  88. Last observed by Zachary Kaiser on 29 Sep 2023
  89. Last observed by Jack Bushong on 7 Sep 2020
  90. Last observed by Zachary Kaiser on 29 Sep 2023
  91. Last observed by Tony Leukering on 23 Sep 1996
  92. Last observed by Randall Siebert on 15 Sep 2007
  93. Last observed by Loch Kilpatrick on 11 Sep 2023
  94. Last observed by Zachary Kaiser on 29 Sep 2023
  95. Last observed by Randall Siebert on 15 Sep 2007
  96. Last observed by Candice Johnson on 9 Sep 2021
  97. Last observed by Elaine Hendricks on 27 Sep 2023
  98. Last observed by Elaine Hendricks on 27 Sep 2023
  99. Last observed by Kevin Rutherford on 16 Sep 2022
  100. Last observed by Roger Mattson on 22 Sep 2023
  101. Last observed by Elaine Hendricks on 27 Sep 2023
  102. Last observed by Roger Mattson on 22 Sep 2023
  103. Last observed by L Pera on 24 Sep 2023
  104. Last observed by Cynthia Madsen on 14 Sep 2021
  105. Last observed by L Pera on 24 Sep 2023
  106. Last observed by Elaine Hendricks on 27 Sep 2023
  107. Last observed by Colorado Bird Records Committee on 27 Sep 1976
  108. Last observed by Glenn Walbek on 23 Sep 2005
  109. Last observed by Zachary Kaiser on 23 Sep 2023
  110. Last observed by L Pera on 24 Sep 2023
  111. Last observed by Grant Wiest on 22 Sep 2022
  112. Last observed by DAVID HILL on 9 Sep 2023
  113. Last observed by Van Remsen on 21 Sep 1997
  114. Last observed by Michael Molnar on 12 Sep 2023
  115. Last observed by Tamra Moore on 3 Sep 2019
  116. Last observed by Dan Mackesy on 24 Sep 2023
  117. Last observed by Roger Mattson on 22 Sep 2023
  118. Last observed by Norman Erthal on 15 Sep 1991
  119. Last observed by Cole Sage on 10 Sep 2023
  120. Last observed by Elaine Hendricks on 27 Sep 2023
  121. Last observed by Cole Sage on 10 Sep 2023
  122. Last observed by Elaine Hendricks on 27 Sep 2023
  123. Last observed by Bradley Richardson on 24 Sep 2023
  124. Last observed by Graham Ray on 28 Sep 2019
  125. Last observed by Gigi Zarzuela on 17 Sep 2023
  126. Last observed by Hannah Criswell on 28 Sep 2021
  127. Last observed by Wes Donnell on 11 Sep 2023
  128. Last observed by Lane Epps on 18 Sep 2023
  129. Last observed by John C Breitsch on 5 Sep 2005
  130. Last observed by Felice Lyons on 17 Sep 2023
  131. Last observed by Loch Kilpatrick on 11 Sep 2023
  132. Last observed by Luke Pheneger on 9 Sep 2023
  133. Last observed by Mark Peterson on 15 Sep 2020
  134. Last observed by L Pera on 24 Sep 2023
  135. Last observed by Norm Lewis on 30 Sep 2020
  136. Last observed by Glenn Walbek on 27 Sep 2020
  137. Last observed by L Pera on 24 Sep 2023
  138. Last observed by Cathy Sheeter on 8 Sep 2013
  139. Last observed by John C Breitsch on 14 Sep 2013
  140. Last observed by Chris Gilbert on 2 Sep 2023
  141. Last observed by Chipper Phillips on 17 Sep 2023
  142. Last observed by Luke Pheneger on 9 Sep 2023
  143. Last observed by Gigi Zarzuela on 17 Sep 2023
  144. Last observed by Colorado Bird Records Committee on 6 Sep 2004
  145. Last observed by Thomas Heinrich on 18 Sep 2023
  146. Last observed by Graham Ray on 8 Sep 2020
  147. Last observed by Grant Wiest on 17 Sep 2023
  148. Last observed by Kevin Rutherford on 4 Sep 2020
  149. Last observed by Felice Lyons on 17 Sep 2023
  150. Last observed by Denver Fall Count on 8 Sep 1996
  151. Last observed by Zachary Kaiser on 29 Sep 2023
  152. Last observed by Norm Lewis on 18 Sep 2023
  153. Last observed by Roger Mattson on 22 Sep 2023
  154. Last observed by Gail Coffey on 20 Sep 2023
  155. Last observed by L Pera on 24 Sep 2023
  156. Last observed by Cole Wild on 24 Sep 2010
  157. Last observed by Matt Hofeditz on 17 Sep 2023
  158. Last observed by Cole Sage on 10 Sep 2023
  159. Last observed by Santi Tabares on 12 Sep 2020
  160. Last observed by Glenn Walbek on 11 Sep 2002
  161. Last observed by Michael Dougherty on 17 Sep 2022
  162. Last observed by L Pera on 24 Sep 2023
  163. Last observed by Thomas Heinrich on 18 Sep 2023
  164. Last observed by joan Coxe on 4 Sep 2014
  165. Last observed by Thomas Heinrich on 18 Sep 2023
  166. Last observed by Matt Hofeditz on 17 Sep 2014
  167. Last observed by Roger Mattson on 22 Sep 2023
  168. Last observed by L Pera on 24 Sep 2023
  169. Last observed by Adam Vesely on 28 Sep 2020
  170. Last observed by David de Rivera Tønnessen on 25 Sep 2021
  171. Last observed by L Pera on 24 Sep 2023
  172. Last observed by L Pera on 24 Sep 2023
  173. Last observed by Timothy Davis on 20 Sep 1996
  174. Last observed by Felice Lyons on 17 Sep 2023
  175. Last observed by Zachary Kaiser on 29 Sep 2023
  176. Last observed by Felice Lyons on 17 Sep 2023
  177. Last observed by Thomas Heinrich on 18 Sep 2023
  178. Last observed by Chris Gilbert on 2 Sep 2023
  179. Last observed by Denver Fall Count on 13 Sep 1986
  180. Last observed by Graham Ray on 25 Sep 2020
  181. Last observed by Denver Fall Count on 8 Sep 1996
  182. Last observed by Michael Dougherty on 17 Sep 2022
  183. Last observed by Luke Pheneger on 27 Sep 2022
  184. Last observed by Zachary Kaiser on 29 Sep 2023
  185. Last observed by Gigi Zarzuela on 17 Sep 2023
  186. Last observed by Elaine Hendricks on 27 Sep 2023
  187. Last observed by Matt Hofeditz on 17 Sep 2023
  188. Last observed by Winston William Brockner on 4 Sep 1983
  189. Last observed by Gigi Zarzuela on 17 Sep 2023
  190. Last observed by Matt Hofeditz on 17 Sep 2023
  191. Last observed by Tyler Wilson on 12 Sep 2023
  192. Last observed by Dan Mackesy on 23 Sep 2023
  193. Last observed by Kimball Garrett on 24 Sep 2006
  194. Last observed by Loch Kilpatrick on 11 Sep 2002
  195. Last observed by Steve Hebert on 7 Sep 2020
  196. Last observed by L Pera on 24 Sep 2023
  197. Last observed by L Pera on 24 Sep 2023
  198. Last observed by Tyler Wilson on 12 Sep 2023
  199. Last observed by Loch Kilpatrick on 11 Sep 2023
  200. Last observed by Cathy Sheeter on 2 Sep 2020
  201. Last observed by Dan Mackesy on 24 Sep 2023
  202. Last observed by Thomas Heinrich on 18 Sep 2023
  203. Last observed by Luke Pheneger on 27 Sep 2022
  204. Last observed by Thomas Heinrich on 18 Sep 2023
  205. Last observed by Tyler Wilson on 12 Sep 2023
  206. Last observed by L Pera on 24 Sep 2023
  207. Last observed by Norm Lewis on 18 Sep 2023
  208. Last observed by Matt Hofeditz on 17 Sep 2023
  209. Last observed by Luke Pheneger on 27 Sep 2022
  210. Last observed by Loch Kilpatrick on 11 Sep 2023
  211. Last observed by DAVID HILL on 9 Sep 2023
  212. Last observed by Glenn Walbek on 4 Sep 2005
  213. Last observed by Kevin Rutherford on 22 Sep 2023
  214. Last observed by Steven Mlodinow on 15 Sep 2014
  215. Last observed by Luke Pheneger on 9 Sep 2023
  216. Last observed by Grant Wiest on 17 Sep 2023
  217. Last observed by Loch Kilpatrick on 11 Sep 2023
  218. Last observed by Kevin Rutherford on 22 Sep 2023
  219. Last observed by Elaine Hendricks on 27 Sep 2023
  220. Last observed by Wyatt Flood on 9 Sep 2021
  221. Last observed by art reisman on 11 Sep 2021
  222. Last observed by Loch Kilpatrick on 6 Sep 2003
  223. Last observed by Denver Fall Count on 9 Sep 1984
  224. Last observed by Norm Lewis on 3 Sep 2001
  225. Last observed by Colorado Bird Records Committee on 7 Sep 1994
  226. Last observed by Felice Lyons on 19 Sep 2021
  227. Last observed by Cathy Sheeter on 7 Sep 2013
  228. Last observed by Gail Coffey on 20 Sep 2023
  229. Last observed by Lane Epps on 18 Sep 2023
  230. Last observed by Mark Peterson on 15 Sep 2020
  231. Last observed by Nick Moore on 15 Sep 2013
  232. Last observed by Cole Sage on 10 Sep 2023
  233. Last observed by Jason Beason on 25 Sep 2001
  234. Last observed by L Pera on 24 Sep 2023
  235. Last observed by Loch Kilpatrick on 17 Sep 2005
  236. Last observed by Loch Kilpatrick on 11 Sep 2023
  237. Last observed by Norman Erthal on 5 Sep 1986
  238. Last observed by Denver Fall Count on 10 Sep 2006
  239. Last observed by Glenn Walbek on 6 Sep 2020
  240. Last observed by Felice Lyons on 17 Sep 2023
  241. Last observed by Norman Erthal on 10 Sep 1983
  242. Last observed by Mark Chavez on 1 Sep 2017
  243. Last observed by Glenn Walbek on 24 Sep 2011
  244. Last observed by L Pera on 24 Sep 2023
  245. Last observed by Kevin Rutherford on 16 Sep 2022
  246. Last observed by Loch Kilpatrick on 11 Sep 2023
  247. Last observed by Ryan Bushong on 5 Sep 2020
  248. Last observed by Glenn Walbek on 3 Sep 2001
  249. Last observed by L Pera on 24 Sep 2023
  250. Last observed by Wes Donnell on 16 Sep 2023
  251. Last observed by Luke Pheneger on 9 Sep 2023
  252. Last observed by L Pera on 24 Sep 2023
  253. Last observed by Felice Lyons on 17 Sep 2023
  254. Last observed by Cynthia Madsen on 14 Sep 2019

Exotic: Provisional (1)

  1. Last observed by Felice Lyons on 17 Sep 2023

Exotic: Escapee (2)

  1. Last observed by Dennis Parslow on 10 Sep 2008
  2. Last observed by Hugh Kingery on 27 Sep 2014

Hybrids (2)

  1. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    Last observed by Steven Mlodinow on 21 Sep 2016
  2. Black-capped x Mountain Chickadee (hybrid) Poecile atricapillus x gambeli
    Last observed by Wyatt Flood on 23 Sep 2021

Additional Taxa (57)

  1. Cackling/Canada Goose Branta hutchinsii/canadensis
    Last observed by Candice Johnson on 13 Sep 2020
  2. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    Last observed by Candice Johnson on 15 Sep 2022
  3. teal sp. Anatidae sp. (teal sp.)
    Last observed by Mark Holmgren on 30 Sep 2021
  4. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    Last observed by Jonny Sperling on 28 Sep 2021
  5. duck sp. Anatidae (duck sp.)
    Last observed by Chris Chappell on 5 Sep 2022
  6. Horned/Eared Grebe Podiceps auritus/nigricollis
    Last observed by william wuerthele on 21 Sep 2014
  7. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    Last observed by Mike Mosser on 10 Sep 2023
  8. grebe sp. Podicipedidae sp.
    Last observed by Meg Reck on 15 Sep 2018
  9. pigeon/dove sp. Columbidae sp.
    Last observed by Virginia Dickinson on 4 Sep 2021
  10. hummingbird sp. Trochilidae sp.
    Last observed by Kevin Rutherford on 4 Sep 2023
  11. American/Pacific Golden-Plover (Lesser Golden-Plover) Pluvialis dominica/fulva
    Last observed by Denver Fall Count on 13 Sep 1986
  12. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    Last observed by David de Rivera Tønnessen on 25 Sep 2021
  13. phalarope sp. Phalaropus sp.
    Last observed by David Wade on 12 Sep 2022
  14. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    Last observed by Ken Wat on 3 Sep 2023
  15. Western/Semipalmated Sandpiper Calidris mauri/pusilla
    Last observed by Robert Raker on 8 Sep 2018
  16. peep sp. Calidris sp. (peep sp.)
    Last observed by Archer Silverman on 9 Sep 2023
  17. Calidris sp. Calidris sp.
    Last observed by Santi Tabares on 12 Sep 2020
  18. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    Last observed by Diana Humple on 28 Sep 2014
  19. shorebird sp. Charadriiformes sp.
    Last observed by Thomas Heinrich on 18 Sep 2023
  20. jaeger sp. Stercorarius sp. (jaeger sp.)
    Last observed by Colorado Bird Records Committee on 17 Sep 1976
  21. Larus sp. Larus sp.
    Last observed by Candice Johnson on 13 Sep 2020
  22. gull sp. Larinae sp.
    Last observed by Meg Reck on 12 Sep 2023
  23. Forster's/Common Tern Sterna forsteri/hirundo
    Last observed by Cameron Carver on 1 Sep 2018
  24. Sterna sp. Sterna sp.
    Last observed by Tracy Rackauskas on 9 Sep 2017
  25. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    Last observed by Art Hudak on 12 Sep 2020
  26. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    Last observed by Brian Tavernia on 2 Sep 2019
  27. Accipiter sp. Accipiter sp.
    Last observed by Kevin Rutherford on 16 Sep 2022
  28. Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
    Last observed by Jonny Sperling on 28 Sep 2021
  29. Buteo sp. Buteo sp.
    Last observed by Candice Johnson on 15 Sep 2022
  30. hawk sp. Accipitridae sp. (hawk sp.)
    Last observed by Janice Arey on 12 Sep 2021
  31. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    Last observed by Jack Bushong on 7 Sep 2020
  32. woodpecker sp. Picidae sp.
    Last observed by Gary Gray on 29 Sep 2017
  33. large falcon sp. Falco sp. (large falcon sp.)
    Last observed by Gary Gray on 29 Sep 2017
  34. falcon sp. Falco sp.
    Last observed by Megan Miller on 1 Sep 2018
  35. Western/Eastern Wood-Pewee Contopus sordidulus/virens
    Last observed by Cameron Carver on 9 Sep 2018
  36. pewee sp. (Contopus sp.) Contopus sp.
    Last observed by Matt Hofeditz on 26 Sep 2017
  37. Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/traillii
    Last observed by David Dowell on 2 Sep 2016
  38. Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseri
    Last observed by Cameron Carver on 1 Sep 2018
  39. Empidonax sp. Empidonax sp.
    Last observed by Kathryn Kay on 11 Sep 2023
  40. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    Last observed by Jill Boice on 26 Sep 2022
  41. new world flycatcher sp. Tyrannidae sp.
    Last observed by Cynthia Cestkowski on 28 Sep 2020
  42. Cassin's/Blue-headed Vireo Vireo cassinii/solitarius
    Last observed by Megan Miller on 24 Sep 2011
  43. Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus
    Last observed by Diane Birks on 4 Sep 2019
  44. vireo sp. Vireo sp.
    Last observed by william wuerthele on 21 Sep 2014
  45. Loggerhead/Northern Shrike Lanius ludovicianus/borealis
    Last observed by Robert Martinez on 26 Sep 2014
  46. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    Last observed by Kayla Scheid on 18 Sep 2018
  47. swallow sp. Hirundinidae sp.
    Last observed by Jennifer Clarke on 7 Sep 2021
  48. wren sp. Troglodytidae sp.
    Last observed by Jack Bushong on 30 Sep 2017
  49. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    Last observed by Lane Epps on 18 Sep 2023
  50. Spizella sp. Spizella sp.
    Last observed by Luke Pheneger on 9 Sep 2023
  51. new world sparrow sp. Passerellidae sp.
    Last observed by Lane Epps on 18 Sep 2023
  52. Sturnella meadowlark sp. Sturnella sp.
    Last observed by JDDJ Johnston on 22 Sep 2022
  53. Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus
    Last observed by Anonymous eBirder on 28 Sep 2012
  54. grackle sp. Quiscalus sp.
    Last observed by Virginia Dickinson on 4 Sep 2021
  55. blackbird sp. Icteridae sp.
    Last observed by Jack Bushong on 30 Sep 2017
  56. new world warbler sp. Parulidae sp.
    Last observed by Thomas Heinrich on 18 Sep 2023
  57. passerine sp. Passeriformes sp.
    Last observed by Matt Gray on 15 Sep 2019