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William O'Brien State Park

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Illustrated Checklist

 Powered by Macaulay Library and eBird
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208 Species Observed
Species w/ Photos
Species w/ Audio
Species Needing Photos
Species Needing Audio
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Native and Naturalized (208)

  1. Last observed by Anonymous eBirder on 13 May 2023
  2. Last observed by Laurie Skelly on 26 Apr 2025
  3. Last observed by Todd Arnold on 7 Apr 2025
  4. Last observed by Todd Arnold on 23 Mar 2025
  5. Last observed by Armand Cohen on 24 Apr 2025
  6. Last observed by Laurie Skelly on 26 Apr 2025
  7. Last observed by Todd Arnold on 5 May 2023
  8. Last observed by Anonymous eBirder on 9 Apr 2022
  9. Last observed by Ezra Hosch on 8 May 2019
  10. Last observed by Laurie Skelly on 26 Apr 2025
  11. Last observed by Anonymous eBirder on 5 May 2022
  12. Last observed by Randall Owen on 25 Apr 2018
  13. Last observed by Randal Newton on 6 Apr 2024
  14. Last observed by Evan Boening on 16 Apr 2023
  15. Last observed by Todd Arnold on 24 Mar 2025
  16. Last observed by Todd Arnold on 9 Apr 2023
  17. Last observed by Todd Arnold on 26 Mar 2025
  18. Last observed by George Heimpel on 24 Feb 2024
  19. Last observed by Gae Jarvis on 24 Apr 2019
  20. Last observed by Todd Arnold on 24 Apr 2025
  21. Last observed by Armand Cohen on 24 Apr 2025
  22. Last observed by Laurie Skelly on 26 Apr 2025
  23. Last observed by Anonymous eBirder on 19 Apr 2025
  24. Last observed by Armand Cohen on 24 Apr 2025
  25. Last observed by Ethan Hulett on 3 Jun 2024
  26. Last observed by Yasushi Nakagawa on 30 Jun 2024
  27. Last observed by Laura Hemlock on 24 Aug 2024
  28. Last observed by Nick Lardinois on 4 May 2024
  29. Last observed by Ethan Kilmer on 29 May 2024
  30. Last observed by Barry Knack on 8 Sep 2024
  31. Last observed by Richard Laubach on 21 Jun 2024
  32. Last observed by Randal Newton on 20 Sep 2024
  33. Last observed by Armand Cohen on 4 Jun 2024
  34. Last observed by Armand Cohen on 24 Apr 2025
  35. Last observed by Armand Cohen on 24 Apr 2025
  36. Last observed by Tom Hargy on 14 Sep 2023
  37. Last observed by Annie Kay on 18 Mar 2025
  38. Last observed by Armand Cohen on 24 Apr 2025
  39. Last observed by Randal Newton on 16 May 2024
  40. Last observed by Anonymous eBirder on 12 May 2023
  41. Last observed by Sherry Gray on 2 Nov 2023
  42. Last observed by Jill Sadler on 26 May 2021
  43. Last observed by Gae Jarvis on 15 Nov 2023
  44. Last observed by Wilmer Fernandez on 27 Sep 2020
  45. Last observed by Sue Plankis on 6 Apr 2025
  46. Last observed by Ezra Hosch on 10 Apr 2021
  47. Last observed by Liz Harper on 19 May 2023
  48. Last observed by Peter Nichols on 29 May 2023
  49. Last observed by Randall Owen on 25 Apr 2018
  50. Last observed by David Beck on 12 May 2024
  51. Last observed by Eric Lind on 17 Jul 2024
  52. Last observed by Will Koebert on 25 Jul 2024
  53. Last observed by Karl Isely on 15 May 2023
  54. Last observed by Kyle Te Poel on 6 May 2021
  55. Last observed by Randall Owen on 6 Sep 2024
  56. Last observed by Todd Arnold on 6 Aug 2024
  57. Last observed by Laurie Skelly on 26 Apr 2025
  58. Last observed by John Leaf on 6 Apr 2025
  59. Last observed by Laurie Skelly on 26 Apr 2025
  60. Last observed by Richard Buckland on 1 Jul 2024
  61. Last observed by William Marengo on 14 May 2016
  62. Last observed by Todd Arnold on 12 Apr 2025
  63. Last observed by Todd Arnold on 2 Sep 2024
  64. Last observed by Armand Cohen on 24 Apr 2025
  65. Last observed by Laurie Skelly on 26 Apr 2025
  66. Last observed by Armand Cohen on 24 Apr 2025
  67. Last observed by Armand Cohen on 24 Apr 2025
  68. Last observed by Sue Plankis on 6 Apr 2025
  69. Last observed by Anonymous eBirder on 3 Apr 2022
  70. Last observed by Anonymous eBirder on 4 Feb 2024
  71. Last observed by Jacob Roberts on 14 Mar 2025
  72. Last observed by Todd Arnold on 12 Apr 2025
  73. Last observed by Adam R. on 29 Oct 2023
  74. Last observed by Armand Cohen on 24 Apr 2025
  75. Last observed by Barry Knack on 8 Sep 2024
  76. Last observed by Laurie Skelly on 26 Apr 2025
  77. Last observed by Armand Cohen on 24 Apr 2025
  78. Last observed by Armand Cohen on 24 Apr 2025
  79. Last observed by Armand Cohen on 24 Apr 2025
  80. Last observed by Armand Cohen on 24 Apr 2025
  81. Last observed by Armand Cohen on 24 Apr 2025
  82. Last observed by Alex O’Brien on 27 Oct 2024
  83. Last observed by Armand Cohen on 29 Oct 2024
  84. Last observed by Todd Arnold on 11 May 2024
  85. Last observed by Stephanie Roettger on 1 Sep 2024
  86. Last observed by Randal Newton on 7 Sep 2024
  87. Last observed by Stephanie Roettger on 1 Sep 2024
  88. Last observed by Connor Haindfield on 5 Jul 2024
  89. Last observed by Todd Arnold on 7 Aug 2024
  90. Last observed by Will Koebert on 25 Jul 2024
  91. Last observed by Barry Knack on 8 Sep 2024
  92. Last observed by Armand Cohen on 24 Apr 2025
  93. Last observed by Sue Plankis on 14 Sep 2024
  94. Last observed by Todd Arnold on 7 Aug 2024
  95. Last observed by Barry Knack on 8 Sep 2024
  96. Last observed by Armand Cohen on 21 May 2024
  97. Last observed by Randal Newton on 7 Sep 2024
  98. Last observed by Anonymous eBirder on 6 Jul 2024
  99. Last observed by Sue Plankis on 14 Sep 2024
  100. Last observed by Todd Arnold on 7 Nov 2024
  101. Last observed by Armand Cohen on 24 Apr 2025
  102. Last observed by Armand Cohen on 24 Apr 2025
  103. Last observed by Anonymous eBirder on 19 Apr 2025
  104. Last observed by Armand Cohen on 24 Apr 2025
  105. Last observed by Randal Newton on 20 May 2024
  106. Last observed by Anonymous eBirder on 13 Apr 2024
  107. Last observed by Ian Hunter on 14 Jul 2022
  108. Last observed by Armand Cohen on 24 Apr 2025
  109. Last observed by Todd Arnold on 8 Aug 2024
  110. Last observed by James Didier on 9 Jul 2024
  111. Last observed by Jason Hedlund on 16 Aug 2024
  112. Last observed by Todd Arnold on 7 Aug 2024
  113. Last observed by Armand Cohen on 24 Apr 2025
  114. Last observed by Todd Arnold on 12 Apr 2025
  115. Last observed by Armand Cohen on 24 Apr 2025
  116. Last observed by Armand Cohen on 29 Oct 2024
  117. Last observed by Armand Cohen on 24 Apr 2025
  118. Last observed by Lana Schaffer on 3 Sep 2024
  119. Last observed by Armand Cohen on 24 Apr 2025
  120. Last observed by Anonymous eBirder on 19 Apr 2025
  121. Last observed by Todd Arnold on 10 Aug 2024
  122. Last observed by Armand Cohen on 24 Apr 2025
  123. Last observed by Todd Arnold on 22 Mar 2025
  124. Last observed by Connor Holt on 5 Oct 2024
  125. Last observed by Armand Cohen on 24 Apr 2025
  126. Last observed by Armand Cohen on 24 Apr 2025
  127. Last observed by Jason Hedlund on 16 Aug 2024
  128. Last observed by Kyle Nelson on 20 May 2024
  129. Last observed by Barry Knack on 8 Sep 2024
  130. Last observed by Armand Cohen on 24 Apr 2025
  131. Last observed by James Didier on 9 Jul 2024
  132. Last observed by Armand Cohen on 24 Apr 2025
  133. Last observed by Armand Cohen on 29 Oct 2024
  134. Last observed by Rafael Angel Arenas Wong on 3 Aug 2023
  135. Last observed by Armand Cohen on 8 Nov 2024
  136. Last observed by Todd Arnold on 21 Apr 2025
  137. Last observed by Todd Arnold on 7 Apr 2025
  138. Last observed by Liz Harper on 19 Mar 2023
  139. Last observed by Ezra Hosch on 5 Jan 2025
  140. Last observed by Ezra Hosch on 3 Apr 2022
  141. Last observed by Ethan Kistler | WINGS on 27 May 2024
  142. Last observed by Laurie Skelly on 26 Apr 2025
  143. Last observed by Richard Laubach on 22 Jun 2024
  144. Last observed by Armand Cohen on 24 Apr 2025
  145. Last observed by Connor Haindfield on 5 Jul 2024
  146. Last observed by Armand Cohen on 24 Apr 2025
  147. Last observed by Jill Sadler on 26 May 2021
  148. Last observed by Anonymous eBirder on 19 Apr 2025
  149. Last observed by John Leaf on 6 Apr 2025
  150. Last observed by Armand Cohen on 24 Apr 2025
  151. Last observed by Armand Cohen on 1 Nov 2024
  152. Last observed by Anonymous eBirder on 26 Oct 2024
  153. Last observed by Armand Cohen on 24 Apr 2025
  154. Last observed by Eric Lind on 17 Jul 2024
  155. Last observed by Anonymous eBirder on 15 May 2024
  156. Last observed by Randal Newton on 20 Sep 2024
  157. Last observed by Anonymous eBirder on 15 May 2024
  158. Last observed by Armand Cohen on 24 Apr 2025
  159. Last observed by Armand Cohen on 29 Oct 2024
  160. Last observed by Armand Cohen on 24 Apr 2025
  161. Last observed by Armand Cohen on 24 Apr 2025
  162. Last observed by Ethan Kistler | WINGS on 29 May 2021
  163. Last observed by Ezra Hosch on 22 May 2021
  164. Last observed by K Jay on 17 May 2022
  165. Last observed by Armand Cohen on 27 Jun 2024
  166. Last observed by Ethan Kilmer on 27 Jun 2024
  167. Last observed by Armand Cohen on 24 Apr 2025
  168. Last observed by Armand Cohen on 24 Apr 2025
  169. Last observed by Todd Arnold on 26 Oct 2024
  170. Last observed by Sarah Hagen on 7 May 2023
  171. Last observed by Anonymous eBirder on 19 Apr 2025
  172. Last observed by James Didier on 9 Jul 2024
  173. Last observed by Dana Sterner on 29 May 2023
  174. Last observed by Jason Hedlund on 11 May 2024
  175. Last observed by Barry Knack on 8 Sep 2024
  176. Last observed by James Didier on 9 Jul 2024
  177. Last observed by Karina Hanson on 14 Sep 2024
  178. Last observed by Peter Nichols on 29 May 2023
  179. Last observed by Randal Newton on 20 Sep 2024
  180. Last observed by Armand Cohen on 24 Apr 2025
  181. Last observed by Randal Newton on 20 Sep 2024
  182. Last observed by Jason Hedlund on 11 May 2024
  183. Last observed by Anonymous eBirder on 8 Jun 2024
  184. Last observed by Peder Svingen on 15 May 2002
  185. Last observed by Sue Plankis on 14 Sep 2024
  186. Last observed by Anonymous eBirder on 6 Jul 2024
  187. Last observed by Barry Knack on 8 Sep 2024
  188. Last observed by Jason Hedlund on 11 May 2024
  189. Last observed by Ricky Roman on 16 Jun 2024
  190. Last observed by Jonny Logas on 27 Jul 2024
  191. Last observed by Randal Newton on 20 Sep 2024
  192. Last observed by Randal Newton on 16 May 2024
  193. Last observed by Randal Newton on 29 May 2024
  194. Last observed by Jason Hedlund on 16 Aug 2024
  195. Last observed by Randall Owen on 6 Sep 2024
  196. Last observed by Randal Newton on 29 May 2024
  197. Last observed by Armand Cohen on 24 Apr 2025
  198. Last observed by Anonymous eBirder on 19 Apr 2025
  199. Last observed by Armand Cohen on 24 Apr 2025
  200. Last observed by Me XMan on 25 May 2024
  201. Last observed by Randal Newton on 20 May 2024
  202. Last observed by Stephanie Roettger on 1 Sep 2024
  203. Last observed by Eric Lind on 17 Jul 2024
  204. Last observed by Dana Sterner on 21 May 2017
  205. Last observed by Armand Cohen on 24 Apr 2025
  206. Last observed by Barry Knack on 8 Sep 2024
  207. Last observed by Michael Janke on 12 Aug 2024
  208. Last observed by Peter Nichols on 30 Jun 2012

Hybrids (2)

  1. Golden-winged x Blue-winged Warbler (hybrid) Vermivora chrysoptera x cyanoptera
    Last observed by Richard Bunn on 20 Jun 2018
  2. Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)
    Last observed by Richard Bunn on 20 Jun 2018

Additional Taxa (34)

  1. Cackling/Canada Goose Branta hutchinsii/canadensis
    Last observed by Laurie Skelly on 26 Apr 2025
  2. Trumpeter/Tundra Swan Cygnus buccinator/columbianus
    Last observed by Sean Hoppes on 9 Apr 2022
  3. goose sp. Anatidae (goose sp.)
    Last observed by Gae Jarvis on 3 Sep 2022
  4. Mallard/American Black Duck Anas platyrhynchos/rubripes
    Last observed by Anonymous eBirder on 6 Jun 2023
  5. teal sp. Anatidae sp. (teal sp.)
    Last observed by Laurie Skelly on 26 Apr 2025
  6. duck sp. Anatidae (duck sp.)
    Last observed by AMY FORSLUND on 21 Apr 2024
  7. shorebird sp. Charadriiformes sp. (shorebird sp.)
    Last observed by Missy Bowen on 21 May 2017
  8. gull sp. Larinae sp.
    Last observed by Sue Plankis on 24 Oct 2022
  9. Sharp-shinned/Cooper's Hawk Accipiter striatus/Astur cooperii
    Last observed by Randy Wilharm on 25 Mar 2023
  10. Accipitrine hawk sp. (former Accipiter sp.) Aerospiza/Tachyspiza/Accipiter/Astur sp.
    Last observed by Todd Arnold on 30 Sep 2023
  11. Buteo sp. Buteo sp.
    Last observed by Dan Beran on 1 Jun 2022
  12. hawk sp. Accipitridae sp. (hawk sp.)
    Last observed by Tim F on 21 Apr 2022
  13. owl sp. Strigiformes sp.
    Last observed by Elizabeth Closmore on 17 May 2020
  14. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    Last observed by Leif Saveraid on 5 May 2024
  15. woodpecker sp. Picidae sp.
    Last observed by Sara Brokaw on 1 Jan 2024
  16. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    Last observed by Steph MacPhail on 12 Jun 2021
  17. Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/traillii
    Last observed by Jason Hedlund on 16 Aug 2024
  18. Empidonax sp. Empidonax sp.
    Last observed by André Turcot on 23 Jun 2024
  19. new world flycatcher sp. Tyrannidae sp.
    Last observed by Randy Wilharm on 14 Aug 2021
  20. Philadelphia/Red-eyed Vireo Vireo philadelphicus/olivaceus
    Last observed by Ezra Hosch on 22 May 2021
  21. vireo sp. Vireo sp.
    Last observed by David Blaney on 26 Sep 2020
  22. swallow sp. Hirundinidae sp.
    Last observed by Joshua Baker on 12 Aug 2023
  23. wren sp. Troglodytidae sp.
    Last observed by Randy Wilharm on 14 Aug 2021
  24. Catharus sp. Catharus sp.
    Last observed by Todd Arnold on 23 May 2023
  25. House/Purple Finch Haemorhous mexicanus/purpureus
    Last observed by Lydia Sund on 12 May 2017
  26. Acanthis/Spinus sp. Acanthis/Spinus sp.
    Last observed by Rick Carlson on 25 May 2022
  27. Spizella sp. Spizella sp.
    Last observed by David Blaney on 26 Sep 2020
  28. new world sparrow sp. Passerellidae sp.
    Last observed by Kyle Te Poel on 20 Oct 2023
  29. Western/Eastern Meadowlark Sturnella neglecta/magna
    Last observed by Kyle Te Poel on 26 Apr 2020
  30. blackbird sp. Icteridae sp.
    Last observed by Todd Arnold on 7 Nov 2024
  31. Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensis
    Last observed by Sean Hoppes on 12 May 2022
  32. new world warbler sp. Parulidae sp.
    Last observed by Jason Hedlund on 7 Jun 2024
  33. passerine sp. Passeriformes sp.
    Last observed by Beth Hedlund on 11 Apr 2024
  34. bird sp. Aves sp.
    Last observed by Jason Hedlund on 16 Aug 2024