Menu

Change Region

Change Region

Jefferson

Map

Explore...

Illustrated Checklist

 Powered by Macaulay Library and eBird
Updated ~21 hours ago
409 Species Observed
Species w/ Photos
Species w/ Audio
Species Needing Photos
Species Needing Audio
Jump to species
View all media

Native and Naturalized (408)

  1. Last observed by Rob Cassady on 12 Mar 2024
  2. Last observed by Will Phillips on 19 Jan 2024
  3. Last observed by Debra Bogar on 19 Mar 2024
  4. Last observed by Reed Gorner on 4 Dec 2022
  5. Last observed by Gigi Zarzuela on 21 Apr 2024
  6. Last observed by Arthur Kleven on 23 Apr 2024
  7. Last observed by Monica Ulrich on 29 Dec 2022
  8. Last observed by Jordan Gerue on 10 Mar 2024
  9. Last observed by patricia kuzma sell on 23 Apr 2024
  10. Last observed by Martha Jones on 23 Apr 2024
  11. Last observed by Max Miller on 23 Apr 2024
  12. Last observed by patricia kuzma sell on 23 Apr 2024
  13. Last observed by patricia kuzma sell on 23 Apr 2024
  14. Last observed by Mari Marquard on 23 Apr 2024
  15. Last observed by Arthur Kleven on 23 Apr 2024
  16. Last observed by John Drummond on 4 Dec 2021
  17. Last observed by Cyndy Johnson on 23 Apr 2024
  18. Last observed by patricia kuzma sell on 23 Apr 2024
  19. Last observed by Jordan Gerue on 21 Apr 2024
  20. Last observed by Mike Clark on 23 Apr 2024
  21. Last observed by Mark McDaniel on 23 Apr 2024
  22. Last observed by patricia kuzma sell on 18 Apr 2024
  23. Last observed by Gigi Zarzuela on 23 Apr 2024
  24. Last observed by Aaron Shipe on 5 Nov 2023
  25. Last observed by Max Miller on 26 Dec 2023
  26. Last observed by Logan Anderson on 22 Nov 2023
  27. Last observed by Bryan Zayach on 16 Mar 2024
  28. Last observed by patricia kuzma sell on 23 Apr 2024
  29. Last observed by Michelle WO on 23 Apr 2024
  30. Last observed by Lynn Slaga on 6 Apr 2024
  31. Last observed by Matthew O'Donnell on 23 Apr 2024
  32. Last observed by Max Miller on 23 Apr 2024
  33. Last observed by Mark McDaniel on 23 Apr 2024
  34. Last observed by Timo Mitzen on 23 Apr 2024
  35. Last observed by Arthur Kleven on 23 Apr 2024
  36. Last observed by Cornelis Reijm on 22 Apr 2024
  37. Last observed by Mari Marquard on 23 Apr 2024
  38. Last observed by Mike Clark on 23 Apr 2024
  39. Last observed by Mike Clark on 12 Jan 2024
  40. Last observed by Shawn Moore on 23 Apr 2024
  41. Last observed by Chris & Holly Marr on 23 Apr 2024
  42. Last observed by Mike Sullivan on 10 Apr 2024
  43. Last observed by Jordan Gerue on 23 Apr 2024
  44. Last observed by Trish Gearhart on 19 Apr 2024
  45. Last observed by Julia Auckland on 23 Apr 2024
  46. Last observed by James McCall on 14 Oct 2023
  47. Last observed by James McCall on 5 Apr 2024
  48. Last observed by Julia Auckland on 23 Apr 2024
  49. Last observed by Bill Schmoker on 18 Mar 2012
  50. Last observed by Timo Mitzen on 14 Jun 2023
  51. Last observed by Joey Kellner on 28 Jul 2001
  52. Last observed by Karen Smith on 16 Sep 2023
  53. Last observed by Aaron Shipe on 24 Sep 2023
  54. Last observed by Adam Green on 17 Aug 2023
  55. Last observed by Archer Silverman on 23 Apr 2024
  56. Last observed by Colorado Bird Records Committee on 30 Aug 2001
  57. Last observed by Mark Chavez on 7 Oct 2023
  58. Last observed by Robert Raker on 12 Oct 2023
  59. Last observed by Mark Chavez on 10 Oct 2021
  60. Last observed by Norm Lewis on 18 Sep 2023
  61. Last observed by Lorraine Lanning on 4 Oct 2023
  62. Last observed by Steven Snyder on 23 Apr 2024
  63. Last observed by Cyndy Johnson on 23 Apr 2024
  64. Last observed by Michael Lester on 24 Sep 2023
  65. Last observed by Dina Baker on 9 Dec 2017
  66. Last observed by patricia kuzma sell on 23 Apr 2024
  67. Last observed by Frank Coons on 17 Apr 2024
  68. Last observed by Robert Raker on 4 Apr 2023
  69. Last observed by Kathy Haley on 21 Apr 2024
  70. Last observed by Mark Chavez on 12 May 2021
  71. Last observed by Tyler Imfeld on 27 Oct 2020
  72. Last observed by Jordan Gerue on 23 Apr 2024
  73. Last observed by Cole Sage on 13 Sep 2023
  74. Last observed by David Waltman on 16 Jun 2011
  75. Last observed by Joe Roller on 10 May 2004
  76. Last observed by David Suddjian on 19 May 2023
  77. Last observed by Aaron Shipe on 14 May 2023
  78. Last observed by Steve Barlow on 26 Aug 2023
  79. Last observed by Timo Mitzen on 19 Apr 2024
  80. Last observed by Frank Farrell on 10 Sep 2022
  81. Last observed by Guillaume Stordeur on 13 May 2023
  82. Last observed by Randi Kenyon on 22 Oct 2019
  83. Last observed by Edmond Holroyd on 22 Apr 2024
  84. Last observed by Jennifer Tonge on 21 May 2023
  85. Last observed by Robert Raker on 29 Sep 2023
  86. Last observed by Jayson D on 14 Oct 2023
  87. Last observed by Gigi Zarzuela on 23 Apr 2024
  88. Last observed by Dorian Anderson on 22 Apr 2024
  89. Last observed by Curtis Higgins on 21 Apr 2024
  90. Last observed by Kathy Mihm Dunning on 20 Apr 2024
  91. Last observed by Steve Ryder on 22 Apr 2024
  92. Last observed by Reed Gorner on 7 May 2022
  93. Last observed by Reed Gorner on 9 Sep 2020
  94. Last observed by Mike Clark on 14 May 2023
  95. Last observed by Vic Zerbi on 3 Sep 1989
  96. Last observed by Mike Clark on 30 Oct 2023
  97. Last observed by Donna Stumpp on 4 Nov 2020
  98. Last observed by Chris Gearhart on 12 Sep 2023
  99. Last observed by Brian Johnson on 5 Jun 2022
  100. Last observed by Frank Farrell on 15 Sep 2023
  101. Last observed by Timo Mitzen on 2 Jun 2022
  102. Last observed by Timo Mitzen on 23 Apr 2023
  103. Last observed by Mark Chavez on 29 Aug 2023
  104. Last observed by Frank Farrell on 14 Sep 2021
  105. Last observed by Glenn Walbek on 30 Sep 2018
  106. Last observed by Mark Amershek on 19 Oct 2016
  107. Last observed by Joey Kellner on 2 Nov 1996
  108. Last observed by Steve Stachowiak on 8 Nov 2004
  109. Last observed by Steve Barlow on 19 Oct 2021
  110. Last observed by Norm Lewis on 12 Nov 2021
  111. Last observed by Michael Lester on 14 Oct 2023
  112. Last observed by Kevin DeBoer on 20 Apr 2024
  113. Last observed by Chris Wood on 27 Oct 1997
  114. Last observed by Steve Stachowiak on 9 Oct 2005
  115. Last observed by Frank Farrell on 23 Apr 2024
  116. Last observed by Gary Pinkel on 3 Jan 2024
  117. Last observed by patricia kuzma sell on 23 Apr 2024
  118. Last observed by Peggy Roberts on 14 Jun 2011
  119. Last observed by Dustin Kohler on 17 Apr 2024
  120. Last observed by Mike Sullivan on 20 Feb 2022
  121. Last observed by Christine Alexander on 22 Dec 2023
  122. Last observed by James McCall on 15 Feb 2024
  123. Last observed by Ginny Bergstrom on 10 Apr 2024
  124. Last observed by Wes Donnell on 23 Feb 2024
  125. Last observed by Nelson Ford on 21 May 2009
  126. Last observed by Aaron Shipe on 10 Sep 2023
  127. Last observed by Robert Raker on 14 May 2023
  128. Last observed by Adam Green on 23 Apr 2024
  129. Last observed by Matt Clark on 29 Oct 2022
  130. Last observed by Phil Lyon on 22 Sep 2023
  131. Last observed by Andrew Monson on 11 Jan 2024
  132. Last observed by Glenn Walbek on 28 Sep 2005
  133. Last observed by Jen Ottinger on 5 Jan 2024
  134. Last observed by Mike Clark on 20 Apr 2024
  135. Last observed by Cole Sites on 2 May 2020
  136. Last observed by Colorado Bird Records Committee on 14 Sep 1985
  137. Last observed by Julia Auckland on 23 Apr 2024
  138. Last observed by Robert Raker on 19 Apr 2024
  139. Last observed by Archer Silverman on 23 Apr 2024
  140. Last observed by Christi Aultman on 25 Apr 2022
  141. Last observed by David Suddjian on 28 Jun 2021
  142. Last observed by Max Miller on 28 Aug 2020
  143. Last observed by patricia kuzma sell on 23 Apr 2024
  144. Last observed by Joey Kellner on 25 Jun 2022
  145. Last observed by Peter Plage on 26 Jun 2012
  146. Last observed by patricia kuzma sell on 23 Apr 2024
  147. Last observed by Scott Somershoe on 18 Oct 2023
  148. Last observed by Chris Petrizzo on 21 Apr 2024
  149. Last observed by Charlie Saunders on 23 Apr 2024
  150. Last observed by patricia kuzma sell on 23 Apr 2024
  151. Last observed by Willy Galey on 25 Jun 2022
  152. Last observed by Duwayne Worthington on 30 Apr 2022
  153. Last observed by Kathy Mihm Dunning on 18 Apr 2024
  154. Last observed by Tyler Wilson on 23 Apr 2024
  155. Last observed by Archer Silverman on 23 Apr 2024
  156. Last observed by Colorado Bird Records Committee on 24 May 1983
  157. Last observed by Archer Silverman on 23 Apr 2024
  158. Last observed by Monica Ulrich on 5 Oct 2022
  159. Last observed by Ben J on 22 Apr 2024
  160. Last observed by Dale Pate on 23 Apr 2024
  161. Last observed by Jordan Gerue on 23 Apr 2024
  162. Last observed by David Suddjian on 18 Apr 2024
  163. Last observed by Lori Morton on 23 Apr 2024
  164. Last observed by Colorado Bird Records Committee on 23 Dec 1994
  165. Last observed by Joey Kellner on 18 Dec 1998
  166. Last observed by Archer Silverman on 23 Apr 2024
  167. Last observed by Julia Auckland on 23 Apr 2024
  168. Last observed by James McCall on 18 Apr 2018
  169. Last observed by patricia kuzma sell on 23 Apr 2024
  170. Last observed by Tom Behnfield on 19 Feb 2024
  171. Last observed by Ryan Corda🦉 on 8 Apr 2024
  172. Last observed by David Suddjian on 22 Sep 2023
  173. Last observed by Loch Kilpatrick on 12 Aug 2023
  174. Last observed by Aaron Shipe on 17 Dec 2023
  175. Last observed by Edmond Holroyd on 17 Apr 2024
  176. Last observed by Eric Perryman on 15 Jan 2018
  177. Last observed by Peter Hansen on 23 Apr 2024
  178. Last observed by michael kiessig on 13 Apr 2024
  179. Last observed by Steve Barlow on 19 Sep 2023
  182. Last observed by Timo Mitzen on 13 Apr 2021
  183. Last observed by Gordon Payne on 11 Apr 2024
  184. Last observed by Arthur Kleven on 23 Apr 2024
  185. Last observed by Dorian Anderson on 22 Apr 2024
  186. Last observed by Aaron Shipe on 27 Jan 2024
  187. Last observed by Julia Auckland on 23 Apr 2024
  188. Last observed by Felice Lyons on 17 Dec 2023
  189. Last observed by Emilia Hawkins on 22 Sep 2023
  190. Last observed by Phil Lyon on 4 Sep 2015
  191. Last observed by Chris Wood on 14 Dec 2022
  192. Last observed by David Suddjian on 18 Apr 2024
  193. Last observed by patricia kuzma sell on 23 Apr 2024
  194. Last observed by David Suddjian on 23 Sep 2014
  195. Last observed by Timo Mitzen on 23 Apr 2024
  196. Last observed by Julia Auckland on 23 Apr 2024
  197. Last observed by Burke Angstman on 24 Aug 2017
  198. Last observed by Hannah Criswell on 23 Apr 2024
  199. Last observed by Robert Tonge on 20 Apr 2024
  200. Last observed by Christian Caryl on 23 Apr 2024
  201. Last observed by Simon Keegan on 17 Apr 2024
  202. Last observed by Timo Mitzen on 11 Sep 2023
  203. Last observed by Hannah Criswell on 29 Sep 2023
  204. Last observed by Colorado Bird Records Committee on 25 Jun 1996
  205. Last observed by Mike Clark on 12 Sep 2023
  206. Last observed by Scott Somershoe on 15 Sep 2023
  207. Last observed by Mark Chavez on 15 Sep 2023
  208. Last observed by Scott Somershoe on 13 Sep 2023
  209. Last observed by Janice Arey on 19 Sep 2023
  210. Last observed by Lorraine Lanning on 12 Sep 2023
  211. Last observed by Mark McDaniel on 21 Apr 2024
  212. Last observed by Jane Lee on 3 Apr 2024
  213. Last observed by Robert Raker on 23 Apr 2024
  214. Last observed by Gary Warner on 2 May 2022
  215. Last observed by Cory Benton on 17 Aug 2023
  216. Last observed by Steven Snyder on 11 Sep 2022
  217. Last observed by Chris Wood on 13 Oct 2018
  218. Last observed by David Suddjian on 4 Oct 2023
  219. Last observed by Colorado Bird Records Committee on 23 Oct 1992
  220. Last observed by Norm Lewis on 20 Sep 2023
  221. Last observed by Max Miller on 17 Sep 2023
  222. Last observed by Curtis Higgins on 17 May 2020
  223. Last observed by Anonymous eBirder on 30 Sep 2023
  224. Last observed by Joey Kellner on 10 Sep 2016
  225. Last observed by Charlie Chase on 25 May 2023
  226. Last observed by Mark Chavez on 22 Sep 2023
  227. Last observed by Mike Clark on 15 Sep 2023
  228. Last observed by Timo Mitzen on 3 Oct 2023
  229. Last observed by Mark Chavez on 5 Oct 2022
  230. Last observed by Chris & Holly Marr on 28 Sep 2023
  231. Last observed by Mike Clark on 14 Sep 2023
  232. Last observed by Kayla Denison on 22 Apr 2024
  233. Last observed by Zachary Peterson on 18 Mar 2024
  234. Last observed by Mark Chavez on 6 Jan 2024
  235. Last observed by Robert Raker on 10 Oct 2023
  236. Last observed by Mike Clark on 23 Apr 2024
  237. Last observed by Julia Auckland on 23 Apr 2024
  238. Last observed by Pat Johnston on 23 Apr 2024
  239. Last observed by Todd GRANTHAM on 23 Apr 2024
  240. Last observed by James Lukenda on 23 Apr 2024
  241. Last observed by Matthew O'Donnell on 23 Apr 2024
  242. Last observed by Todd GRANTHAM on 23 Apr 2024
  243. Last observed by Julia Auckland on 23 Apr 2024
  244. Last observed by Mike Clark on 23 Apr 2024
  245. Last observed by Norm Lewis on 16 Feb 2015
  246. Last observed by Carolyn Lueck on 23 Apr 2024
  247. Last observed by Mike Sullivan on 22 Apr 2024
  248. Last observed by patricia kuzma sell on 23 Apr 2024
  249. Last observed by Archer Silverman on 23 Apr 2024
  250. Last observed by Jeff Bouton on 20 Jul 2023
  251. Last observed by patricia kuzma sell on 23 Apr 2024
  252. Last observed by patricia kuzma sell on 23 Apr 2024
  253. Last observed by patricia kuzma sell on 23 Apr 2024
  254. Last observed by patricia kuzma sell on 23 Apr 2024
  255. Last observed by Julia Auckland on 23 Apr 2024
  256. Last observed by Lauren D’Italia on 17 Apr 2024
  257. Last observed by Jordan Gerue on 23 Apr 2024
  258. Last observed by Mike Clark on 23 Apr 2024
  259. Last observed by Mike Clark on 23 Apr 2024
  260. Last observed by James Lukenda on 23 Apr 2024
  261. Last observed by Nate Bond on 23 Apr 2024
  262. Last observed by Finn Harty on 23 Apr 2024
  263. Last observed by Dean Hester on 23 Apr 2024
  264. Last observed by Steven Snyder on 23 Apr 2024
  265. Last observed by Timo Mitzen on 18 Dec 2022
  266. Last observed by Rob Hamilton on 2 Feb 2024
  267. Last observed by Mike Sullivan on 22 Apr 2024
  268. Last observed by Bruce Cyganowski on 5 Nov 2017
  269. Last observed by Art Hudak on 16 Aug 2015
  270. Last observed by Mike Sullivan on 22 Apr 2024
  271. Last observed by Julia Auckland on 23 Apr 2024
  272. Last observed by Mark Chavez on 19 Jan 2024
  273. Last observed by Alán Palacios on 8 May 2020
  274. Last observed by Robert Raker on 25 Jan 2024
  275. Last observed by Lindsay Purifoy on 22 Apr 2024
  276. Last observed by Art Hudak on 4 Apr 2024
  277. Last observed by Matt Skinner on 23 Mar 2024
  278. Last observed by Mike Clark on 23 Apr 2024
  279. Last observed by Nate Bond on 23 Apr 2024
  280. Last observed by James Lukenda on 23 Apr 2024
  281. Last observed by Karlyn Jenkins on 3 Jan 2022
  282. Last observed by Luke Buckardt on 20 May 2023
  283. Last observed by Aaron Shipe on 17 May 2019
  284. Last observed by William Vanderpoel on 8 Sep 2023
  285. Last observed by Steve Barlow on 23 Apr 2024
  286. Last observed by Hannah Criswell on 7 Jul 2023
  287. Last observed by Barbara Jean Gard on 23 Apr 2024
  288. Last observed by Chris Petrizzo on 6 Apr 2023
  289. Last observed by Debra Bogar on 23 Apr 2024
  290. Last observed by Lucas Fralick on 23 Apr 2024
  291. Last observed by Scott Somershoe on 22 Apr 2024
  292. Last observed by Robert Raker on 6 Oct 2023
  293. Last observed by Anonymous eBirder on 23 Nov 2012
  294. Last observed by Hannah Criswell on 23 Apr 2024
  295. Last observed by Ric Olson on 25 Jan 2024
  296. Last observed by Nate Bond on 25 Mar 2024
  297. Last observed by Laurel George on 3 Apr 2024
  298. Last observed by Laurel George on 18 Mar 2024
  299. Last observed by Robert Raker on 23 Apr 2024
  300. Last observed by David Suddjian on 17 Dec 2022
  301. Last observed by Laurel George on 23 Apr 2024
  302. Last observed by Denise Van Peursem on 28 Nov 2023
  303. Last observed by Laurel George on 23 Apr 2024
  304. Last observed by Alec Hopping on 7 Jan 2021
  305. Last observed by Laurel George on 23 Apr 2024
  306. Last observed by Christopher B 🦆 on 23 Apr 2024
  307. Last observed by Julia Auckland on 23 Apr 2024
  308. Last observed by Peter Nelson on 18 Jan 2024
  309. Last observed by Timo Mitzen on 5 Oct 2023
  310. Last observed by Joey Kellner on 3 Nov 2023
  311. Last observed by Scott Somershoe on 29 Dec 2022
  312. Last observed by Scott Somershoe on 9 Aug 2021
  313. Last observed by Megan Kasprzak on 20 Aug 2023
  314. Last observed by Julia Auckland on 23 Apr 2024
  315. Last observed by Mark Chavez on 25 Oct 2023
  316. Last observed by Mark Chavez on 11 Nov 2023
  317. Last observed by Mike Ferrari on 22 Apr 2024
  318. Last observed by Mark Chavez on 20 May 2021
  319. Last observed by Scott Somershoe on 23 Apr 2024
  320. Last observed by Paul Laurent on 6 Nov 2023
  321. Last observed by Reed Gorner on 3 Apr 2024
  322. Last observed by David Suddjian on 25 Mar 2024
  323. Last observed by Julia Auckland on 23 Apr 2024
  324. Last observed by Julia Auckland on 23 Apr 2024
  325. Last observed by Steve Barlow on 27 Nov 2023
  326. Last observed by Scott Somershoe on 23 Apr 2024
  327. Last observed by Blake Besser on 15 Apr 2024
  328. Last observed by Kevin DeBoer on 25 Mar 2024
  329. Last observed by Mike Clark on 23 Apr 2024
  330. Last observed by Max Miller on 23 Apr 2024
  331. Last observed by Wendi Fisher on 18 Jun 2018
  332. Last observed by Pat Johnston on 23 Apr 2024
  333. Last observed by Hannah Criswell on 23 Apr 2024
  334. Last observed by Brian Johnson on 4 Mar 2024
  335. Last observed by Julie G on 28 Apr 2023
  336. Last observed by Dale Pate on 23 Apr 2024
  337. Last observed by Julia Auckland on 23 Apr 2024
  338. Last observed by Colorado Bird Records Committee on 9 Dec 1977
  339. Last observed by Anonymous eBirder on 30 Sep 2023
  340. Last observed by Frank Farrell on 23 Apr 2024
  341. Last observed by Chris Wood on 25 Aug 2022
  342. Last observed by Julia Auckland on 23 Apr 2024
  343. Last observed by Christian Nunes on 12 Jul 2022
  344. Last observed by Timo Mitzen on 10 Sep 2023
  345. Last observed by Cyndy Johnson on 23 Apr 2024
  346. Last observed by Diane Davies on 19 Aug 2020
  347. Last observed by Andrew Spencer on 13 May 2002
  348. Last observed by Julia Auckland on 23 Apr 2024
  349. Last observed by Norm Lewis on 30 Jun 1990
  350. Last observed by Christopher B 🦆 on 23 Apr 2024
  351. Last observed by Chuck Aid on 23 Mar 2024
  352. Last observed by Mark Chavez on 23 Apr 2024
  353. Last observed by patricia kuzma sell on 23 Apr 2024
  354. Last observed by Kevin DeBoer on 23 Apr 2024
  355. Last observed by Elaine Wagner on 13 Jul 2023
  356. Last observed by Michael Monahan on 16 May 2021
  357. Last observed by Burke Angstman on 16 Sep 2023
  358. Last observed by Mike Clark on 15 May 2023
  359. Last observed by Monica Ulrich on 24 Sep 2023
  360. Last observed by Ginny Bergstrom on 9 Apr 2024
  361. Last observed by Elizabeth Hall on 3 May 2023
  362. Last observed by Colorado Bird Records Committee on 17 May 1986
  363. Last observed by Mark Chavez on 10 Sep 2023
  364. Last observed by David Suddjian on 21 Oct 2023
  365. Last observed by Jennifer Tonge on 8 May 2023
  366. Last observed by Mark Chavez on 11 Oct 2023
  367. Last observed by Helen Butts on 17 Sep 2023
  368. Last observed by Mike Clark on 13 Sep 2023
  369. Last observed by Trish Gearhart on 13 May 2021
  370. Last observed by Gerald "Jerry" Baines on 10 May 2017
  371. Last observed by Scott Somershoe on 10 Oct 2023
  372. Last observed by Robert Doster on 21 Apr 2024
  373. Last observed by Michael Lester on 17 Sep 2023
  374. Last observed by Chris Wood on 3 Jan 2024
  375. Last observed by Mele Avery on 23 Apr 2024
  376. Last observed by Jeff Birek on 26 May 2023
  377. Last observed by Joey Kellner on 22 Oct 2000
  378. Last observed by David Suddjian on 6 Oct 2022
  379. Last observed by Mark Chavez on 21 Sep 2023
  380. Last observed by Madeline Siegel on 16 May 2023
  381. Last observed by Matt Winter on 16 May 2023
  382. Last observed by Ric Olson on 8 Nov 2022
  383. Last observed by Mark Chavez on 23 Sep 2023
  384. Last observed by Mark Chavez on 22 Aug 2022
  385. Last observed by Julia Auckland on 23 Apr 2024
  386. Last observed by Hillary White on 9 May 2023
  387. Last observed by Aaron Shipe on 23 Sep 2023
  388. Last observed by Mike Edgecombe on 26 Apr 2023
  389. Last observed by David Suddjian on 14 May 2023
  390. Last observed by debi bailey on 2 Jan 2024
  391. Last observed by William Zwartjes cc on 28 Apr 1979
  392. Last observed by Norm Lewis on 10 May 2023
  393. Last observed by Mike Sullivan on 31 May 2021
  394. Last observed by Michael Bankoff on 14 Oct 2023
  395. Last observed by Joseph Gebler on 3 May 1993
  396. Last observed by Colorado Bird Records Committee on 16 May 1965
  397. Last observed by Colorado Bird Records Committee on 9 Sep 2002
  398. Last observed by Joy S on 4 Jun 2023
  399. Last observed by Hannah Criswell on 6 Jun 2022
  400. Last observed by Mark Chavez on 24 Oct 2023
  401. Last observed by Reed Gorner on 5 Jun 2021
  402. Last observed by Timo Mitzen on 6 Sep 2023
  403. Last observed by David Suddjian on 1 Oct 2023
  404. Last observed by Scott Somershoe on 4 Oct 2023
  405. Last observed by Scott Somershoe on 4 Oct 2023
  406. Last observed by Anne Craig on 2 Aug 2023
  407. Last observed by Craig Baker on 8 Jun 2020
  408. Last observed by Katie Gaston on 15 Jul 2023

Exotic: Provisional (1)

  1. Last observed by Dieter Kamm on 25 Dec 1984

Exotic: Escapee (14)

  1. Last observed by Jane Lee on 28 Feb 2024
  2. Last observed by Robert Robinson on 25 Dec 2016
  3. Last observed by RMBO Waterbird Survey on 30 Nov 2003
  4. Last observed by Heidi Retherford on 19 Sep 2009
  5. Last observed by Maureen Blackford on 28 Mar 2013
  6. Last observed by Gara Hudson on 27 Dec 1992
  7. Last observed by Hugh Kingery on 18 Nov 1978
  8. Last observed by Ethan Parrish on 29 Dec 2021
  9. Last observed by Gabriel Wiltse on 22 Jun 2021
  10. Last observed by Shannon Magee on 14 Mar 2021
  11. Last observed by Doug Faulkner on 15 Mar 2023
  12. Last observed by Edmond Holroyd on 7 Apr 2002
  13. Last observed by Curtis Higgins on 18 Jun 2023
  14. Last observed by Jason Gardner on 2 Nov 2016

Hybrids (28)

  1. Snow x Ross's Goose (hybrid) Anser caerulescens x rossii
    Last observed by Allison Moody on 21 Nov 2021
  2. Snow x Cackling Goose (hybrid) Anser caerulescens x Branta hutchinsii
    Last observed by Robert Raker on 13 Feb 2024
  3. Ross's x Cackling Goose (hybrid) Anser rossii x Branta hutchinsii
    Last observed by Scott Somershoe on 20 Jan 2024
  4. Greater White-fronted x Cackling Goose (hybrid) Anser albifrons x Branta hutchinsii
    Last observed by Robert Raker on 22 Nov 2022
  5. Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensis
    Last observed by Nate Bond on 4 May 2022
  6. Graylag x Canada Goose (hybrid) Anser anser x Branta canadensis
    Last observed by Max Miller on 23 Apr 2024
  7. Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensis
    Last observed by Evan Tilton on 24 Nov 2022
  8. Ross's x Canada Goose (hybrid) Anser rossii x Branta canadensis
    Last observed by Scott Somershoe on 27 Feb 2024
  9. Snow/Ross's x Cackling/Canada Goose (hybrid) Anser caerulescens/rossii x Branta hutchinsii/canadensis
    Last observed by Ric Olson on 8 Jan 2024
  10. Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanoptera
    Last observed by Cyndy Johnson on 5 Apr 2024
  11. Cinnamon Teal x Northern Shoveler (hybrid) Spatula cyanoptera x clypeata
    Last observed by Michael Lester on 4 Apr 2023
  12. Gadwall x American Wigeon (hybrid) Mareca strepera x americana
    Last observed by Robert Raker on 9 Nov 2021
  13. Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchos
    Last observed by Bea Weaver on 28 Nov 2014
  14. Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchos
    Last observed by David Suddjian on 4 Oct 2016
  15. Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diazi
    Last observed by Robert Raker on 29 Jan 2024
  16. Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acuta
    Last observed by Anne Craig on 30 Jan 2024
  17. Common Goldeneye x Hooded Merganser (hybrid) Bucephala clangula x Lophodytes cucullatus
    Last observed by Timo Mitzen on 23 Mar 2023
  18. goldeneye sp. x Hooded Merganser (hybrid) Bucephala clangula/islandica x Lophodytes cucullatus
    Last observed by Rebecca Laroche on 28 Nov 2019
  19. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    Last observed by David Schulte on 9 Oct 2021
  20. Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
    Last observed by Scott Somershoe on 10 Jan 2019
  21. Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihi
    Last observed by Tony Leukering on 12 May 2006
  22. Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruber
    Last observed by Mark Chavez on 13 Dec 2023
  23. Black x Eastern Phoebe (hybrid) Sayornis nigricans x phoebe
    Last observed by Ginny Bergstrom on 17 Apr 2024
  24. Black-capped x Mountain Chickadee (hybrid) Poecile atricapillus x gambeli
    Last observed by Doug Kibbe on 24 Feb 2023
  25. Western x Chihuahuan Meadowlark (hybrid) Sturnella neglecta x lilianae
    Last observed by Christian Nunes on 14 Jun 2023
  26. Bullock's x Baltimore Oriole (hybrid) Icterus bullockii x galbula
    Last observed by James McCall on 12 May 2020
  27. Rose-breasted x Black-headed Grosbeak (hybrid) Pheucticus ludovicianus x melanocephalus
    Last observed by Kris Petersen on 27 May 2011
  28. Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyanea
    Last observed by Jeff Bouton on 20 Jul 2023

Additional Taxa (135)

  1. Snow/Ross's Goose Anser caerulescens/rossii
    Last observed by Debra Bogar on 4 Feb 2024
  2. Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
    Last observed by Allison Moody on 15 Apr 2024
  3. Cackling/Canada Goose Branta hutchinsii/canadensis
    Last observed by Arthur Kleven on 21 Apr 2024
  4. Trumpeter/Tundra Swan Cygnus buccinator/columbianus
    Last observed by Ken Wat on 26 Dec 2022
  5. swan sp. Cygnus sp.
    Last observed by David Suddjian on 6 Dec 2016
  6. goose sp. Anatidae (goose sp.)
    Last observed by Scott Somershoe on 20 Jan 2024
  7. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    Last observed by Uwe Abraham on 21 Apr 2024
  8. Eurasian/American Wigeon Mareca penelope/americana
    Last observed by Frank Coons on 5 Apr 2024
  9. Mallard/Mexican Duck Anas platyrhynchos/diazi
    Last observed by Jean McClenathen on 12 Apr 2024
  10. teal sp. Anatidae sp. (teal sp.)
    Last observed by Rob Hamilton on 18 Nov 2023
  11. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    Last observed by Evan Tilton on 6 Apr 2024
  12. Greater/Lesser Scaup Aythya marila/affinis
    Last observed by Kieran Schnitzspahn on 22 Apr 2024
  13. Aythya sp. Aythya sp.
    Last observed by Curtis Higgins on 14 Apr 2024
  14. Surf/Black Scoter Melanitta perspicillata/americana
    Last observed by Michael Lester on 3 Nov 2018
  15. scoter sp. Melanitta sp.
    Last observed by Frank Farrell on 1 Nov 2023
  16. Common/Barrow's Goldeneye Bucephala clangula/islandica
    Last observed by Cynthia Inklebarger on 5 Feb 2024
  17. Common/Red-breasted Merganser Mergus merganser/serrator
    Last observed by Cynthia Inklebarger on 5 Feb 2024
  18. merganser sp. Mergellus/Lophodytes/Mergus sp.
    Last observed by Christine J on 26 Dec 2023
  19. duck sp. Anatidae (duck sp.)
    Last observed by Tanzhen Deru on 19 Apr 2024
  20. Horned/Eared Grebe Podiceps auritus/nigricollis
    Last observed by Lori Morton on 16 Apr 2024
  21. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    Last observed by Karen Freundlich on 17 Dec 2023
  22. grebe sp. Podicipedidae sp.
    Last observed by Darcy Juday on 29 Dec 2023
  23. Eurasian/African Collared-Dove Streptopelia decaocto/roseogrisea
    Last observed by Michael Lester on 8 Feb 2021
  24. pigeon/dove sp. Columbidae sp.
    Last observed by Evan Tilton on 2 Mar 2024
  25. Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmus
    Last observed by Helen Butts on 26 May 2019
  26. nightjar sp. Caprimulgidae sp.
    Last observed by Justin Bright on 17 Aug 2023
  27. large swift sp. Apodidae sp. (large swift sp.)
    Last observed by Laura Pyle on 9 Jun 2023
  28. swift sp. Apodidae sp.
    Last observed by Scott Dieni on 22 Apr 2024
  29. Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandri
    Last observed by Matt Klein on 28 Sep 2023
  30. Rufous/Allen's Hummingbird Selasphorus rufus/sasin
    Last observed by Frank Coons on 15 Aug 2022
  31. Selasphorus sp. Selasphorus sp.
    Last observed by Megan Kasprzak on 20 Aug 2023
  32. hummingbird sp. Trochilidae sp.
    Last observed by Jessica Colby on 2 Oct 2023
  33. Black-bellied Plover/golden-plover sp. Pluvialis sp.
    Last observed by Mary Geder on 10 Oct 2019
  34. plover sp. Charadriidae sp.
    Last observed by Claire H on 11 Jul 2020
  35. godwit sp. Limosa sp.
    Last observed by Julia Gwinn on 1 May 2019
  36. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    Last observed by Michael Lester on 25 Sep 2022
  37. Red/Red-necked Phalarope Phalaropus fulicarius/lobatus
    Last observed by Steve Barlow on 30 Sep 2021
  38. phalarope sp. Phalaropus sp.
    Last observed by Timo Mitzen on 12 Sep 2020
  39. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    Last observed by Curtis Higgins on 20 Apr 2024
  40. Western/Semipalmated Sandpiper Calidris mauri/pusilla
    Last observed by Diane Birks on 27 Aug 2016
  41. peep sp. Calidris sp. (peep sp.)
    Last observed by Linda Lee on 11 Sep 2022
  42. Calidris sp. Calidris sp.
    Last observed by Max Miller on 14 Apr 2023
  43. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    Last observed by Frank Coons on 15 Oct 2022
  44. shorebird sp. Charadriiformes sp.
    Last observed by Ginny Bergstrom on 10 Apr 2024
  45. jaeger sp. Stercorarius sp. (jaeger sp.)
    Last observed by Chip Clouse on 14 Oct 2020
  46. Herring/Iceland Gull Larus argentatus/glaucoides
    Last observed by C. Warneke on 31 Dec 2023
  47. Larus sp. Larus sp.
    Last observed by Scott Dieni on 23 Mar 2024
  48. gull sp. Larinae sp.
    Last observed by Lori Morton on 16 Apr 2024
  49. Forster's/Common Tern Sterna forsteri/hirundo
    Last observed by Kevin DeBoer on 2 May 2022
  50. Common/Arctic Tern Sterna hirundo/paradisaea
    Last observed by Michael Lester on 18 Sep 2021
  51. Sterna sp. Sterna sp.
    Last observed by Joey Kellner on 12 Sep 2007
  52. tern sp. Sterninae sp.
    Last observed by Anonymous eBirder on 17 Sep 2022
  53. loon sp. Gavia sp.
    Last observed by C. Warneke on 31 Dec 2023
  54. Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
    Last observed by Robert Raker on 7 Jun 2022
  55. Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violacea
    Last observed by Patrick Fuller on 12 May 2023
  56. heron sp. Ardeidae sp.
    Last observed by Brian Tavernia on 11 May 2019
  57. white egret sp. Egretta/Bubulcus/Ardea sp.
    Last observed by Karen Freundlich on 12 Oct 2023
  58. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    Last observed by Elaine Wagner on 5 Jun 2023
  59. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    Last observed by Lorraine Lanning on 23 Apr 2024
  60. Cooper's Hawk/American Goshawk Accipiter cooperii/atricapillus
    Last observed by Nancy Wulkan on 21 May 2023
  61. Accipiter sp. Accipiter sp.
    Last observed by Lorraine Lanning on 23 Apr 2024
  62. Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
    Last observed by David Wald on 16 Feb 2024
  63. Buteo sp. Buteo sp.
    Last observed by Thomas Heinrich on 3 Apr 2024
  64. Buteo/eagle sp. Buteo/eagle sp.
    Last observed by Evan Tilton on 21 May 2023
  65. hawk sp. Accipitridae sp. (hawk sp.)
    Last observed by Matt Skinner on 17 Apr 2024
  66. eagle sp. Accipitridae sp. (eagle sp.)
    Last observed by Sarah Evans on 30 Jun 2023
  67. owl sp. Strigiformes sp.
    Last observed by Dan Riegel on 28 Apr 2023
  68. Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalis
    Last observed by Peter Nelson on 22 Sep 2021
  69. sapsucker sp. Sphyrapicus sp.
    Last observed by Joey Negreann on 17 Sep 2023
  70. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    Last observed by Sutton Ballard on 21 Apr 2024
  71. woodpecker sp. Picidae sp.
    Last observed by David Suddjian on 9 Feb 2024
  72. large falcon sp. Falco sp. (large falcon sp.)
    Last observed by Dean Hester on 23 Apr 2024
  73. small falcon sp. Falco sp. (small falcon sp.)
    Last observed by Susan Krause on 16 Jul 2023
  74. falcon sp. Falco sp.
    Last observed by Ric Olson on 14 Apr 2024
  75. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    Last observed by Lori Morton on 16 Apr 2024
  76. Western/Eastern Wood-Pewee Contopus sordidulus/virens
    Last observed by Alice Tariot on 6 Jun 2023
  77. pewee sp. (Contopus sp.) Contopus sp.
    Last observed by Rob Haynes on 9 May 2023
  78. Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/traillii
    Last observed by Art Hudak on 25 May 2023
  79. Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseri
    Last observed by Steve Barlow on 20 May 2023
  80. Gray/Dusky Flycatcher Empidonax wrightii/oberholseri
    Last observed by Ben J on 14 May 2023
  81. Empidonax sp. Empidonax sp.
    Last observed by Fianna W on 29 Sep 2023
  82. phoebe sp. Sayornis sp.
    Last observed by Sarrah Reshamwala on 22 Apr 2024
  83. Myiarchus sp. Myiarchus sp.
    Last observed by robert bowker on 14 Aug 2020
  84. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    Last observed by Timo Mitzen on 5 Oct 2023
  85. new world flycatcher sp. Tyrannidae sp.
    Last observed by Evan Wilder on 20 Apr 2024
  86. Cassin's/Blue-headed Vireo Vireo cassinii/solitarius
    Last observed by Susan Krause on 19 Sep 2019
  87. Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus
    Last observed by Anonymous eDipper on 5 Sep 2023
  88. solitary vireo sp. Vireo cassinii/solitarius/plumbeus
    Last observed by C S Laux on 4 Jun 2021
  89. vireo sp. Vireo sp.
    Last observed by Felice Lyons on 14 Sep 2023
  90. Loggerhead/Northern Shrike Lanius ludovicianus/borealis
    Last observed by maria straub on 4 Mar 2023
  91. shrike sp. Lanius sp.
    Last observed by Suzy Hiskey on 26 Mar 2019
  92. jay sp. Corvidae sp. (jay sp.)
    Last observed by Bob Spencer on 1 Oct 2022
  93. raven sp. Corvus sp. (raven sp.)
    Last observed by Mark McDaniel on 16 Apr 2024
  94. crow/raven sp. Corvus sp.
    Last observed by Mark McDaniel on 16 Apr 2024
  95. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    Last observed by Abed Nashef on 21 Apr 2024
  96. chickadee sp. Poecile sp.
    Last observed by Tom Wilberding on 2 Feb 2021
  97. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    Last observed by Kathy Mihm Dunning on 20 Apr 2024
  98. Tachycineta sp. Tachycineta sp.
    Last observed by Steve Roels on 26 May 2019
  99. swallow sp. Hirundinidae sp.
    Last observed by Debra Bogar on 23 Apr 2024
  100. Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapa
    Last observed by Robert Lanaghan on 23 Apr 2023
  101. nuthatch sp. Sitta sp.
    Last observed by Valerie Stone on 13 Apr 2024
  102. Pacific/Winter Wren Troglodytes pacificus/hiemalis
    Last observed by Dale Pate on 30 Oct 2017
  103. wren sp. Troglodytidae sp.
    Last observed by Dan Shuber on 21 Sep 2023
  104. bluebird sp. Sialia sp.
    Last observed by Raymond Sperger on 20 Apr 2024
  105. Catharus sp. Catharus sp.
    Last observed by Jeff Birek on 20 May 2023
  106. thrush sp. Turdidae sp.
    Last observed by Patricia DiLuzio on 17 Apr 2024
  107. Bohemian/Cedar Waxwing Bombycilla garrulus/cedrorum
    Last observed by Charlie Saunders on 9 Feb 2024
  108. rosy-finch sp. Leucosticte sp.
    Last observed by Laurel George on 18 Mar 2024
  109. Haemorhous sp. Haemorhous sp.
    Last observed by Timothy Stechert on 17 Feb 2024
  110. crossbill sp. Loxia sp.
    Last observed by Mark Chavez on 11 Oct 2023
  111. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    Last observed by Jordan Gerue on 19 Nov 2023
  112. finch sp. Fringillidae sp.
    Last observed by James Lukenda on 22 Apr 2024
  113. longspur sp. Calcarius/Rhynchophanes sp.
    Last observed by Ric Olson on 5 Apr 2021
  114. Spizella sp. Spizella sp.
    Last observed by David Suddjian on 28 Sep 2023
  115. Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.
    Last observed by Gerald "Jerry" Baines on 8 Dec 2023
  116. Zonotrichia sp. Zonotrichia sp.
    Last observed by Jeremy Jones on 18 Nov 2023
  117. Lincoln's/Swamp Sparrow Melospiza lincolnii/georgiana
    Last observed by Karen Smith on 8 May 2021
  118. Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmus
    Last observed by Leslie Bluestone on 24 Jul 2023
  119. towhee sp. Melozone/Pipilo sp.
    Last observed by Cher Tufly on 17 Feb 2024
  120. new world sparrow sp. Passerellidae sp.
    Last observed by Kaeli Mueller on 23 Mar 2024
  121. Western/Eastern Meadowlark Sturnella neglecta/magna
    Last observed by Cynthia Inklebarger on 19 Apr 2024
  122. Western/Chihuahuan Meadowlark Sturnella neglecta/lilianae
    Last observed by Christian Nunes on 9 Jun 2021
  123. Sturnella meadowlark sp. Sturnella sp.
    Last observed by Sela Hardy on 23 Mar 2024
  124. Bullock's/Baltimore Oriole Icterus bullockii/galbula
    Last observed by Anonymous eBirder on 1 Jun 2021
  125. new world oriole sp. Icterus sp.
    Last observed by Eamon W on 21 Sep 2023
  126. grackle sp. Quiscalus sp.
    Last observed by Thomas Smith on 27 May 2023
  127. blackbird sp. Icteridae sp.
    Last observed by Jayson D on 5 Apr 2024
  128. Setophaga sp. Setophaga sp.
    Last observed by Scott Somershoe on 3 Sep 2021
  129. new world warbler sp. Parulidae sp.
    Last observed by Archer Silverman on 22 Apr 2024
  130. tanager sp. (Piranga sp.) Piranga sp.
    Last observed by Daniel Beyer on 23 May 2021
  131. Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalus
    Last observed by Michael Lester on 4 Aug 2023
  132. Lazuli/Indigo Bunting Passerina amoena/cyanea
    Last observed by Edmond Holroyd on 13 Sep 2023
  133. Passerina sp. Passerina sp.
    Last observed by Archer Silverman on 22 Apr 2024
  134. passerine sp. Passeriformes sp.
    Last observed by Frank Coons on 23 Apr 2024
  135. bird sp. Aves sp.
    Last observed by Reed Gorner on 18 Aug 2020