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Illustrated Checklist

 Powered by Macaulay Library and eBird
Updated ~21 seconds ago

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245 Species Observed
Species w/ Photos
Species w/ Audio
Species Needing Photos
Species Needing Audio
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Native and Naturalized (245)

  1. Last observed by Mary Beth Albrechtsen on 1 Jan 2024
  2. Last observed by Greg Osland on 22 Dec 2023
  3. Last observed by Josh Bruening on 10 Nov 2021
  4. Last observed by Josh Bruening on 20 Nov 2005
  5. Last observed by Greg Osland on 10 Apr 2024
  6. Last observed by Paul Ode on 28 Apr 2024
  7. Last observed by Micheal Peterson on 30 Dec 2023
  8. Last observed by Joe Kipper on 30 Dec 2023
  9. Last observed by Brendan Beers on 22 Apr 2024
  10. Last observed by Finn Ward on 28 Apr 2024
  11. Last observed by Ken Pals on 24 Apr 2024
  12. Last observed by Josiah Quinn on 28 Apr 2024
  13. Last observed by Finn Ward on 28 Apr 2024
  14. Last observed by Brad Biggerstaff on 8 Nov 2010
  15. Last observed by Josh Bruening on 17 Apr 2024
  16. Last observed by Finn Ward on 28 Apr 2024
  17. Last observed by Joe Mammoser on 2 Nov 2020
  18. Last observed by Rory Van Lieu on 16 Apr 2024
  19. Last observed by Michael Adams on 21 Apr 2024
  20. Last observed by Will Morris on 12 Apr 2024
  21. Last observed by Josiah Quinn on 28 Apr 2024
  22. Last observed by Josh Bruening on 17 Apr 2024
  23. Last observed by Jim Nachel on 8 Dec 2023
  24. Last observed by Josiah Quinn on 28 Apr 2024
  25. Last observed by Bobbie Tilmant on 20 Oct 2015
  26. Last observed by Ryan Giordanelli on 4 Nov 2023
  27. Last observed by David Dowell on 27 Nov 2013
  28. Last observed by Josh Bruening on 1 Jan 2024
  29. Last observed by Finn Ward on 28 Apr 2024
  30. Last observed by Josh Bruening on 17 Apr 2024
  31. Last observed by Bryan Tarbox on 19 Nov 2023
  32. Last observed by Josh Bruening on 17 Apr 2024
  33. Last observed by Finn Ward on 28 Apr 2024
  34. Last observed by Josiah Quinn on 28 Apr 2024
  35. Last observed by Paul Ode on 28 Apr 2024
  36. Last observed by George Waaler on 21 Nov 2021
  37. Last observed by Josh Bruening on 17 Apr 2024
  38. Last observed by Finn Ward on 28 Apr 2024
  39. Last observed by Marcel Such on 17 Nov 2020
  40. Last observed by Finn Ward on 28 Apr 2024
  41. Last observed by Finn Ward on 28 Apr 2024
  42. Last observed by Paul Ode on 28 Apr 2024
  43. Last observed by Joe Kipper on 11 Apr 2024
  44. Last observed by Peyton Carson on 17 Apr 2024
  45. Last observed by Christian Atherton on 4 Mar 2012
  46. Last observed by Finn Ward on 28 Apr 2024
  47. Last observed by Nick Komar on 12 Sep 2020
  48. Last observed by Larry Einemann on 17 Oct 2015
  49. Last observed by Nancy Trimmer on 27 Aug 2020
  50. Last observed by Richard Taylor on 15 Jun 1984
  51. Last observed by Scott Shaum on 24 Jul 2023
  52. Last observed by Joshua Smith on 6 Aug 2020
  53. Last observed by Joe Kipper on 7 Aug 2020
  54. Last observed by Andy Bankert on 4 Jun 2017
  55. Last observed by Noah Brinkman on 5 Apr 2021
  56. Last observed by Finn Ward on 28 Apr 2024
  57. Last observed by Michael Adams on 21 Apr 2024
  58. Last observed by Mike Greenfelder on 29 Aug 2022
  59. Last observed by Brendan Beers on 22 Apr 2024
  60. Last observed by Brendan Beers on 5 Nov 2023
  61. Last observed by Greg Osland on 2 Nov 2020
  62. Last observed by Finn Ward on 28 Apr 2024
  63. Last observed by Sean Fitzgerald on 7 Oct 2021
  64. Last observed by Nick Komar on 25 Apr 2004
  65. Last observed by Joshua Smith on 6 Aug 2020
  66. Last observed by Josh Bruening on 2 Aug 2020
  67. Last observed by Josh Bruening on 5 Sep 2020
  68. Last observed by Emma Hovland on 7 Oct 2023
  69. Last observed by Donald Pendleton on 4 Sep 2021
  70. Last observed by Greg Osland on 15 Oct 2021
  71. Last observed by Jim Nachel on 24 Oct 2021
  72. Last observed by Joe Kipper on 15 Sep 2023
  73. Last observed by Bryan Tarbox on 26 Sep 2020
  74. Last observed by Finn Harty on 6 Nov 2023
  75. Last observed by Greg Osland on 22 Sep 2020
  76. Last observed by Finn Harty on 6 Nov 2023
  77. Last observed by Christine Sparks on 9 Sep 2020
  78. Last observed by Cole Wild on 24 Sep 2022
  79. Last observed by Jim Nachel on 5 Nov 2021
  80. Last observed by Josh Bruening on 24 Nov 2020
  81. Last observed by Brendan Beers on 24 Sep 2022
  82. Last observed by Cole Wild on 24 Sep 2022
  83. Last observed by Cole Wild on 15 Sep 2022
  84. Last observed by Nick Block on 21 Sep 2003
  85. Last observed by Greg Osland on 24 Aug 2021
  86. Last observed by Fort Collins Natural Area on 19 Sep 2004
  87. Last observed by Nick Block on 21 Sep 2003
  88. Last observed by Kevin McGrath on 28 Sep 2023
  89. Last observed by Brendan Beers on 22 Apr 2024
  90. Last observed by Brendan Beers on 22 Apr 2024
  91. Last observed by Paul Ode on 28 Apr 2024
  92. Last observed by Tony Leukering on 19 Oct 2003
  93. Last observed by Finn Harty on 6 Nov 2023
  94. Last observed by Finn Harty on 6 Nov 2023
  95. Last observed by Greg Osland on 10 Apr 2024
  96. Last observed by Grant Pegram on 18 Feb 2023
  97. Last observed by Jim Nachel on 16 Sep 2020
  98. Last observed by Greg Wann on 16 Sep 2023
  99. Last observed by Andrew Monson on 15 Sep 2023
  100. Last observed by Josh Bruening on 16 Sep 2020
  101. Last observed by Finn Harty on 6 Nov 2023
  102. Last observed by Donna Stumpp on 21 Nov 2023
  103. Last observed by Josiah Quinn on 28 Apr 2024
  104. Last observed by Finn Ward on 28 Apr 2024
  105. Last observed by Roger Linfield on 22 Sep 2006
  106. Last observed by Sean Walters on 6 Sep 2014
  107. Last observed by Michael Adams on 17 Apr 2024
  108. Last observed by James Kachline on 15 Apr 2024
  109. Last observed by Carrie Olson on 11 Jun 2018
  110. Last observed by James Kachline on 15 Apr 2024
  111. Last observed by Jim Nachel on 13 Apr 2024
  112. Last observed by Josiah Quinn on 28 Apr 2024
  113. Last observed by Bryan Tarbox on 17 May 2022
  114. Last observed by Kevin McGrath on 28 Sep 2023
  115. Last observed by Josiah Quinn on 28 Apr 2024
  116. Last observed by Donna Stumpp on 21 Apr 2024
  117. Last observed by Josiah Quinn on 28 Apr 2024
  118. Last observed by Paul Ode on 28 Apr 2024
  119. Last observed by Lorraine Lanning on 11 Apr 2024
  120. Last observed by Finn Ward on 28 Apr 2024
  121. Last observed by Fawn Simonds on 27 Nov 2018
  122. Last observed by Anonymous eBirder on 18 Apr 2014
  123. Last observed by Finn Ward on 28 Apr 2024
  124. Last observed by Finn Ward on 28 Apr 2024
  125. Last observed by Donna Stumpp on 21 Apr 2024
  126. Last observed by Donna Stumpp on 21 Apr 2024
  127. Last observed by Joe Kipper on 18 Aug 2019
  128. Last observed by Kristin Tallis on 6 Jan 2024
  129. Last observed by Jim Nachel on 16 Nov 2020
  130. Last observed by Paul Ode on 28 Apr 2024
  131. Last observed by Linda Lee on 13 Oct 2019
  132. Last observed by Donald Beaver on 10 May 1964
  133. Last observed by Michael Adams on 17 Apr 2024
  134. Last observed by Kyle Christensen on 26 Aug 2023
  135. Last observed by Josiah Quinn on 28 Apr 2024
  136. Last observed by Finn Ward on 28 Apr 2024
  137. Last observed by Jim Nachel on 15 Sep 2023
  138. Last observed by Donna Stumpp on 21 Apr 2024
  139. Last observed by Brad Dobson on 13 Apr 2024
  140. Last observed by Jadon Miranda on 24 May 2022
  141. Last observed by Bryan Tarbox on 16 Sep 2023
  142. Last observed by Tracy Engle on 21 May 2023
  143. Last observed by Andy Bankert on 22 May 2017
  144. Last observed by Mark Domincovich on 30 Jul 2019
  145. Last observed by Sean Caufield on 16 Sep 2023
  146. Last observed by Finn Ward on 28 Apr 2024
  147. Last observed by Greg Wann on 16 Sep 2023
  148. Last observed by Sean Caufield on 16 Sep 2023
  149. Last observed by Kyle Christensen on 26 Aug 2023
  150. Last observed by (Ai)Tao Liu on 16 Sep 2023
  151. Last observed by Paul Ode on 28 Apr 2024
  152. Last observed by Judd Patterson on 10 Dec 2023
  153. Last observed by Steve Bennett on 21 Apr 2014
  154. Last observed by Rory Van Lieu on 16 Apr 2024
  155. Last observed by George Waaler on 21 Nov 2021
  156. Last observed by Jim Nachel on 21 Apr 2024
  157. Last observed by Finn Ward on 13 Apr 2024
  158. Last observed by Jim Nachel on 6 Mar 2024
  159. Last observed by Josiah Quinn on 28 Apr 2024
  160. Last observed by Megan Miller on 18 Nov 2017
  161. Last observed by Jim Nachel on 20 Apr 2024
  162. Last observed by Finn Ward on 28 Apr 2024
  163. Last observed by Finn Ward on 28 Apr 2024
  164. Last observed by Finn Ward on 28 Apr 2024
  165. Last observed by Finn Ward on 28 Apr 2024
  166. Last observed by Finn Ward on 28 Apr 2024
  167. Last observed by Finn Ward on 28 Apr 2024
  168. Last observed by (Ai)Tao Liu on 13 Sep 2023
  169. Last observed by Jacob Koenig on 2 Oct 2020
  170. Last observed by Josh Bruening on 19 Oct 2020
  171. Last observed by Joseph Wallace on 10 Oct 2023
  172. Last observed by Kevin McGrath on 28 Sep 2023
  173. Last observed by Joshua Smith on 13 Oct 2020
  174. Last observed by Josh Bruening on 29 Aug 2020
  175. Last observed by Joe Kipper on 15 Sep 2023
  176. Last observed by Paul Ode on 28 Apr 2024
  177. Last observed by Finn Harty on 6 Nov 2023
  178. Last observed by Finn Ward on 28 Apr 2024
  179. Last observed by Brendan Beers on 26 May 2021
  180. Last observed by Jim Nachel on 9 May 2018
  181. Last observed by Whitney Pennington on 20 Apr 2024
  182. Last observed by Kevin McGrath on 28 Sep 2023
  183. Last observed by Josh Bruening on 21 Oct 2021
  184. Last observed by Anonymous eBirder on 17 Mar 2024
  185. Last observed by Greg Osland on 17 Jan 2022
  186. Last observed by Brendan Beers on 23 May 2023
  187. Last observed by Paul Ode on 28 Apr 2024
  188. Last observed by Finn Ward on 28 Apr 2024
  189. Last observed by Jim Nachel on 16 Sep 2023
  190. Last observed by Ellen Heath on 1 Apr 2024
  191. Last observed by Kyle Christensen on 26 Aug 2023
  192. Last observed by Josiah Quinn on 28 Apr 2024
  193. Last observed by Jesse Kolar on 27 Nov 2020
  194. Last observed by Brendan Beers on 4 Nov 2023
  195. Last observed by Brendan Beers on 5 Nov 2023
  196. Last observed by Joe Kipper on 17 Nov 2020
  197. Last observed by Paul Ode on 28 Apr 2024
  198. Last observed by Paul Ode on 28 Apr 2024
  199. Last observed by Cole Wild on 1 Dec 2022
  200. Last observed by Sean Fitzgerald on 7 Oct 2021
  201. Last observed by Caleb Alons on 8 Jul 2020
  202. Last observed by Adam Miller on 17 Jun 2023
  203. Last observed by Betsy Checchia on 16 Oct 2023
  204. Last observed by David Fraide on 17 Sep 2023
  205. Last observed by Jeff Birek on 29 Sep 2012
  206. Last observed by Josiah Quinn on 28 Apr 2024
  207. Last observed by Finn Ward on 28 Apr 2024
  208. Last observed by Jim Nachel on 6 Aug 2023
  209. Last observed by Anonymous eBirder on 17 Mar 2024
  210. Last observed by Paul Ode on 28 Apr 2024
  211. Last observed by Finn Ward on 28 Apr 2024
  212. Last observed by Kim Mauritz on 21 Mar 2016
  213. Last observed by Skyler Bol on 9 Nov 2023
  214. Last observed by Finn Ward on 28 Apr 2024
  215. Last observed by Paul Ode on 28 Apr 2024
  216. Last observed by Josiah Quinn on 28 Apr 2024
  217. Last observed by Finn Harty on 6 Nov 2023
  218. Last observed by Cole Wild on 26 Nov 2022
  219. Last observed by Michael Gosselin on 23 May 2022
  220. Last observed by Ken Pals on 24 Apr 2024
  221. Last observed by Amanda Gorely on 24 May 2023
  222. Last observed by Whitney Pennington on 20 Apr 2024
  223. Last observed by Carrie Olson on 22 Jun 2018
  224. Last observed by Josiah Quinn on 28 Apr 2024
  225. Last observed by Andrew Monson on 25 Jun 2023
  226. Last observed by John Shenot on 30 Jul 2023
  227. Last observed by Finn Ward on 28 Apr 2024
  228. Last observed by Annika Abbott on 28 Apr 2024
  229. Last observed by Brendan Beers on 15 Sep 2023
  230. Last observed by Josiah Quinn on 28 Apr 2024
  231. Last observed by Paul Ode on 28 Apr 2024
  232. Last observed by Nick Komar on 27 May 2017
  233. Last observed by Fort Collins Natural Area on 15 May 2005
  234. Last observed by Tiffany Almonte on 12 May 2018
  235. Last observed by robert beauchamp on 25 Sep 2022
  236. Last observed by Tommy Llama on 21 Sep 2022
  237. Last observed by Kyle Wonders on 28 May 2023
  238. Last observed by Larry Frauen on 1 Sep 2023
  239. Last observed by Finn Ward on 28 Apr 2024
  240. Last observed by Josh Bruening on 7 Sep 2020
  241. Last observed by (Ai)Tao Liu on 16 Sep 2023
  242. Last observed by Angus Day on 12 Jul 2019
  243. Last observed by Josh Bruening on 1 Aug 2020
  244. Last observed by Joyce Owens on 30 Jul 2023
  245. Last observed by Josh Bruening on 29 Aug 2020

Exotic: Escapee (2)

  1. Last observed by Fort Collins Natural Area on 19 Oct 2003
  2. Last observed by Andy Bankert on 4 Jun 2017

Hybrids (6)

  1. Snow x Cackling Goose (hybrid) Anser caerulescens x Branta hutchinsii
    Last observed by Dave Farmer on 8 Dec 2021
  2. Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensis
    Last observed by Tom Curtis on 5 Nov 2023
  3. Snow/Ross's x Cackling/Canada Goose (hybrid) Anser caerulescens/rossii x Branta hutchinsii/canadensis
    Last observed by Josh Bruening on 11 Nov 2022
  4. Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchos
    Last observed by David Dowell on 31 Oct 2020
  5. Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acuta
    Last observed by Josh Bruening on 27 Oct 2020
  6. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    Last observed by Kris Perlberg on 6 Jun 2022

Additional Taxa (68)

  1. Snow/Ross's Goose Anser caerulescens/rossii
    Last observed by Joe Kipper on 30 Dec 2023
  2. Cackling/Canada Goose Branta hutchinsii/canadensis
    Last observed by Sheila Webber on 26 Jan 2024
  3. swan sp. Cygnus sp.
    Last observed by Laurie Kleespies on 23 Nov 2015
  4. goose sp. Anatidae (goose sp.)
    Last observed by Anonymous eBirder on 23 Dec 2023
  5. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    Last observed by Norman Erthal on 15 Sep 2020
  6. Eurasian/American Wigeon Mareca penelope/americana
    Last observed by Cole Sage on 4 Dec 2018
  7. teal sp. Anatidae sp. (teal sp.)
    Last observed by (Ai)Tao Liu on 13 Sep 2023
  8. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    Last observed by Emma Hovland on 7 Oct 2023
  9. Greater/Lesser Scaup Aythya marila/affinis
    Last observed by Josh Bruening on 17 Apr 2024
  10. Aythya sp. Aythya sp.
    Last observed by John Shenot on 30 Oct 2023
  11. scoter sp. Melanitta sp.
    Last observed by Greg Osland on 4 Nov 2023
  12. Common/Barrow's Goldeneye Bucephala clangula/islandica
    Last observed by Finn Harty on 6 Nov 2023
  13. Common/Red-breasted Merganser Mergus merganser/serrator
    Last observed by Taylor Bobowski on 11 Dec 2021
  14. duck sp. Anatidae (duck sp.)
    Last observed by Ren-Lee Deru on 8 Apr 2024
  15. Horned/Eared Grebe Podiceps auritus/nigricollis
    Last observed by Greg Osland on 10 Apr 2024
  16. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    Last observed by Jim Nachel on 21 Apr 2024
  17. grebe sp. Podicipedidae sp.
    Last observed by Kelli Bahls on 2 Nov 2023
  18. pigeon/dove sp. Columbidae sp.
    Last observed by Nancy Bartholomew on 17 May 2022
  19. hummingbird sp. Trochilidae sp.
    Last observed by Fort Collins Natural Area on 15 Aug 2004
  20. golden-plover sp. Pluvialis dominica/apricaria/fulva
    Last observed by Greg Osland on 23 Oct 2020
  21. plover sp. Charadriidae sp.
    Last observed by Josh Bruening on 23 Oct 2020
  22. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    Last observed by Irene Fortune on 31 Oct 2023
  23. phalarope sp. Phalaropus sp.
    Last observed by Jim Nachel on 12 Sep 2021
  24. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    Last observed by Bryan Tarbox on 2 Oct 2021
  25. peep sp. Calidris sp. (peep sp.)
    Last observed by Mark Gorges on 23 Oct 2021
  26. shorebird sp. Charadriiformes sp.
    Last observed by Emma Hovland on 7 Oct 2023
  27. Herring/Iceland Gull Larus argentatus/glaucoides
    Last observed by Josh Bruening on 4 Nov 2021
  28. Larus sp. Larus sp.
    Last observed by Grant Medlin on 11 Apr 2024
  29. gull sp. Larinae sp.
    Last observed by Annika Abbott on 28 Apr 2024
  30. Common/Arctic Tern Sterna hirundo/paradisaea
    Last observed by Andy Bankert on 22 May 2017
  31. tern sp. Sterninae sp.
    Last observed by Fabio Lepori on 12 Jun 2019
  32. loon sp. Gavia sp.
    Last observed by Jim Nachel on 6 Nov 2023
  33. Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
    Last observed by Jadon Miranda on 15 Jun 2022
  34. cormorant sp. Phalacrocoracidae sp.
    Last observed by Susan Talburt on 17 Jun 2016
  35. heron sp. Ardeidae sp.
    Last observed by Rachel Siller on 26 Sep 2018
  36. white egret sp. Egretta/Bubulcus/Ardea sp.
    Last observed by Jennifer Atherton on 24 Aug 2017
  37. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    Last observed by David Dowell on 12 Oct 2020
  38. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    Last observed by Jay Breidt on 12 Sep 2020
  39. Accipiter sp. Accipiter sp.
    Last observed by Bryan Tarbox on 2 Oct 2021
  40. Buteo sp. Buteo sp.
    Last observed by Jim Nachel on 4 Nov 2023
  41. hawk sp. Accipitridae sp. (hawk sp.)
    Last observed by Jim Nachel on 4 Nov 2023
  42. eagle sp. Accipitridae sp. (eagle sp.)
    Last observed by Irene Fortune on 15 Nov 2021
  43. sapsucker sp. Sphyrapicus sp.
    Last observed by Sean Walters on 13 Jun 2015
  44. woodpecker sp. Picidae sp.
    Last observed by Adrian Lakin on 1 Aug 2019
  45. large falcon sp. Falco sp. (large falcon sp.)
    Last observed by Sean Walters on 9 May 2020
  46. small falcon sp. Falco sp. (small falcon sp.)
    Last observed by Grant Medlin on 28 Mar 2024
  47. falcon sp. Falco sp.
    Last observed by John Shenot on 17 Feb 2019
  48. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    Last observed by Sean Fitzgerald on 7 Oct 2021
  49. phoebe sp. Sayornis sp.
    Last observed by Sean Caufield on 16 Sep 2023
  50. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    Last observed by Jim Nachel on 15 Sep 2023
  51. yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)
    Last observed by Joe Kipper on 7 Aug 2020
  52. Loggerhead/Northern Shrike Lanius ludovicianus/borealis
    Last observed by Sophie Deitch on 15 Oct 2022
  53. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    Last observed by Diane Roberts on 5 Aug 2018
  54. chickadee sp. Poecile sp.
    Last observed by Raymond VanBuskirk on 28 Jul 2016
  55. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    Last observed by Stan Chapman on 12 Aug 2021
  56. swallow sp. Hirundinidae sp.
    Last observed by J G on 3 Jul 2022
  57. finch sp. Fringillidae sp.
    Last observed by Stacey Elmore on 15 May 2018
  58. Spizella sp. Spizella sp.
    Last observed by Jim Nachel on 20 Sep 2020
  59. new world sparrow sp. Passerellidae sp.
    Last observed by Adam Johnson on 3 Nov 2023
  60. Sturnella meadowlark sp. Sturnella sp.
    Last observed by Judy Strange on 4 May 2018
  61. Bullock's/Baltimore Oriole Icterus bullockii/galbula
    Last observed by Sean Walters on 18 Jun 2016
  62. new world oriole sp. Icterus sp.
    Last observed by Marie Martin on 8 Jun 2019
  63. Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus
    Last observed by Sean Fitzgerald on 7 Oct 2021
  64. grackle sp. Quiscalus sp.
    Last observed by Nick Komar on 15 Nov 2020
  65. blackbird sp. Icteridae sp.
    Last observed by Adam Johnson on 3 Nov 2023
  66. new world warbler sp. Parulidae sp.
    Last observed by (Ai)Tao Liu on 16 Sep 2023
  67. passerine sp. Passeriformes sp.
    Last observed by Gage Strong on 4 Feb 2023
  68. bird sp. Aves sp.
    Last observed by Nick Komar on 14 Nov 2022