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William R Mason Regional Park, Irvine

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Illustrated Checklist

 Powered by Macaulay Library and eBird
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264 Species Observed
Species w/ Photos
Species w/ Audio
Species Needing Photos
Species Needing Audio
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Native and Naturalized (258)

  1. Last observed by Devon Bradley on 3 Dec 2022
  2. Last observed by Peter Gordon on 14 Nov 2022
  3. Last observed by Maury Swoveland on 4 Mar 2020
  4. Last observed by Ken Wells on 29 Dec 2021
  5. Last observed by Julia Black on 20 Apr 2024
  6. Last observed by Nick Ramsey on 21 Mar 2017
  7. Last observed by Trevor Leitz on 22 Oct 2023
  8. Last observed by Rhonda Howard on 23 Feb 2024
  9. Last observed by Jane Schrenzel on 1 Apr 2024
  10. Last observed by Rhonda Howard on 30 Mar 2024
  11. Last observed by William Moramarco on 7 Mar 1992
  12. Last observed by Peter Nguyen on 28 Feb 2024
  13. Last observed by Julia Black on 20 Apr 2024
  14. Last observed by Jill Dale on 12 Oct 2022
  15. Last observed by Peter Gordon on 1 Nov 2023
  16. Last observed by Edana Salisbury on 13 Dec 2023
  17. Last observed by Kat Avila on 27 Apr 2022
  18. Last observed by Eileen Wintemute on 1 Jan 2024
  19. Last observed by Shirley Reynolds on 17 Jan 2024
  20. Last observed by Trevor Leitz on 17 Mar 2024
  21. Last observed by Anonymous eBirder on 15 Nov 2018
  22. Last observed by David Ornellas on 7 Dec 2023
  23. Last observed by Julia Black on 20 Apr 2024
  24. Last observed by Steve Neely on 30 Aug 2021
  25. Last observed by Sharon Granillo on 12 Apr 2024
  26. Last observed by john fitch on 6 Jan 2014
  27. Last observed by Julia Black on 20 Apr 2024
  28. Last observed by Morgan Dandy on 30 Jan 2024
  29. Last observed by Maury Swoveland on 22 May 2020
  30. Last observed by Carol Maxwell on 26 Feb 2024
  31. Last observed by Andrea C on 1 Jul 2023
  32. Last observed by Jami Josifek on 5 Mar 2024
  33. Last observed by Kimball Garrett on 4 Jan 1998
  34. Last observed by Rhonda Howard on 27 Apr 2019
  35. Last observed by Jack Lindahl on 17 May 2019
  36. Last observed by Robert Polkinghorn on 18 Apr 2024
  37. Last observed by Steve Neely on 30 Aug 2021
  38. Last observed by Anonymous eBirder on 20 Jun 2018
  39. Last observed by Steve Morris on 17 May 2012
  40. Last observed by Anonymous eBirder on 27 Sep 2021
  41. Last observed by Rita Phillips on 1 Mar 2024
  42. Last observed by Kevin McAuliffe on 6 May 2022
  43. Last observed by Julia Black on 20 Apr 2024
  44. Last observed by Anonymous eBirder on 27 Dec 2020
  45. Last observed by Linda Thomas on 9 May 2018
  46. Last observed by John Forbes on 8 Apr 2024
  47. Last observed by Julia Black on 20 Apr 2024
  48. Last observed by Brian Daniels on 14 Oct 1995
  49. Last observed by Amarilys Lebron on 4 Dec 2023
  50. Last observed by Raymond Burket on 12 May 2022
  51. Last observed by Barry Spolter on 25 Jul 2022
  52. Last observed by Julia Black on 20 Apr 2024
  53. Last observed by Rhonda Howard on 22 May 2022
  54. Last observed by john fitch on 22 Apr 2002
  55. Last observed by Dan Stoker on 3 Feb 2003
  56. Last observed by Rhonda Howard on 15 Mar 2024
  57. Last observed by Julia Black on 20 Apr 2024
  58. Last observed by Sharon Granillo on 12 Apr 2024
  59. Last observed by Anonymous eBirder on 13 Dec 2020
  60. Last observed by Jordan Kuettle on 3 Dec 2023
  61. Last observed by James Maley on 30 Oct 2022
  62. Last observed by Charles Tian on 14 Sep 2023
  63. Last observed by Rhonda Howard on 10 Aug 2023
  64. Last observed by Robert Polkinghorn on 18 Apr 2024
  65. Last observed by John Haney on 1 Mar 2021
  66. Last observed by Chandra Hulimavu on 3 Apr 2023
  67. Last observed by Rhonda Howard on 7 Apr 2023
  68. Last observed by Rhonda Howard on 10 Aug 2023
  69. Last observed by Laura Robison on 24 Dec 2023
  70. Last observed by Steve Sosensky on 10 Sep 2016
  71. Last observed by Rhonda Howard on 22 May 2022
  72. Last observed by john fitch on 14 Nov 1992
  73. Last observed by Morgan Dandy on 2 Apr 2024
  74. Last observed by James Kendall on 10 Mar 2024
  75. Last observed by Greg Cross on 15 Feb 2017
  76. Last observed by As Is on 11 Mar 2024
  77. Last observed by Alexander Lees on 14 Nov 2000
  78. Last observed by Alexander Lees on 14 Nov 2000
  79. Last observed by Rhonda Howard on 30 Aug 2023
  80. Last observed by Rhonda Howard on 2 Jun 2023
  81. Last observed by Julia Black on 20 Apr 2024
  82. Last observed by Jane Schrenzel on 28 Jun 2023
  83. Last observed by Brian Daniels on 24 Jan 2010
  84. Last observed by George Nothhelfer on 29 Feb 2024
  85. Last observed by Avo Stilt on 17 Sep 2021
  86. Last observed by David Ornellas on 9 Mar 2024
  87. Last observed by Cynthia Case on 1 Sep 2021
  88. Last observed by Phyllis Weintraub on 8 Nov 1975
  89. Last observed by Anonymous eBirder on 19 Aug 2022
  90. Last observed by Jane Schrenzel on 8 Apr 2024
  91. Last observed by Jane Schrenzel on 1 Apr 2024
  92. Last observed by James Kendall on 5 Apr 2023
  93. Last observed by Brian Daniels on 16 Oct 2004
  94. Last observed by Julia Black on 20 Apr 2024
  95. Last observed by Rhonda Howard on 27 Feb 2024
  96. Last observed by Jane Schrenzel on 8 Apr 2024
  97. Last observed by Julia Black on 20 Apr 2024
  98. Last observed by Rhonda Howard on 15 Mar 2024
  99. Last observed by Jami Josifek on 5 Mar 2024
  100. Last observed by Uma Sachdeva on 8 Jan 2022
  101. Last observed by Mary-Rose Hoang on 22 Jan 2023
  102. Last observed by Rita Phillips on 1 Mar 2024
  103. Last observed by Kevin Bergersen on 20 Mar 2024
  104. Last observed by anne stupka on 11 Apr 2023
  105. Last observed by Robert Polkinghorn on 18 Apr 2024
  106. Last observed by Jeff Bray on 30 Mar 2018
  107. Last observed by Sara Bettencourt on 24 Mar 2024
  108. Last observed by Anonymous eBirder on 21 Jun 2018
  109. Last observed by John Forbes on 10 Dec 2022
  110. Last observed by Rita Phillips on 1 Mar 2024
  111. Last observed by David Ornellas on 28 Nov 2023
  112. Last observed by Jonathan Mills-Anderson on 8 Jan 2017
  113. Last observed by Shawn Nielsen on 30 Dec 2018
  114. Last observed by George Nothhelfer on 24 Feb 2024
  115. Last observed by Robert Polkinghorn on 18 Apr 2024
  116. Last observed by Julia Black on 20 Apr 2024
  117. Last observed by Kevin Bergersen on 20 Mar 2024
  118. Last observed by James Kendall on 10 Mar 2024
  119. Last observed by Rhonda Howard on 29 Dec 2023
  120. Last observed by Rhonda Howard on 26 Dec 2023
  121. Last observed by James McNamara on 29 Jun 2018
  122. Last observed by Charles Tian on 4 Sep 2023
  123. Last observed by evonne muse on 24 Feb 2024
  124. Last observed by George Prieksaitis on 12 Mar 2014
  125. Last observed by Raymond Burket on 12 May 2022
  126. Last observed by Anonymous eBirder on 6 May 2023
  127. Last observed by Thomas Van Huss on 2 Jun 2023
  128. Last observed by Tom Benson on 8 Oct 2001
  129. Last observed by Carla Butz on 22 Apr 2023
  130. Last observed by Rhonda Howard on 3 Dec 2023
  131. Last observed by Anonymous eBirder on 10 May 2013
  132. Last observed by Tevin Schmitt on 3 Apr 2024
  133. Last observed by Julia Black on 20 Apr 2024
  134. Last observed by Thomas Ford-Hutchinson on 20 Mar 2013
  135. Last observed by Alan Barbour on 24 Mar 2024
  136. Last observed by Arnav Chandra on 27 Jan 2024
  137. Last observed by Peyton Cook on 20 Dec 2003
  138. Last observed by Thomas Van Huss on 2 Jun 2023
  139. Last observed by Mike Greenfelder on 21 Mar 2001
  140. Last observed by Robert McNab on 8 Oct 2018
  141. Last observed by Robert Polkinghorn on 18 Apr 2024
  142. Last observed by Johannes Hogrefe on 5 Apr 2023
  143. Last observed by Rhonda Howard on 11 Jun 2021
  144. Last observed by Robbie Fischer on 4 Apr 1999
  145. Last observed by Tevin Schmitt on 3 Apr 2024
  146. Last observed by John Forbes on 8 Apr 2024
  147. Last observed by Herb Elliott on 9 Jul 2018
  148. Last observed by Kevin McAuliffe on 6 May 2022
  149. Last observed by Brian Daniels on 3 Oct 1998
  150. Last observed by Rhonda Howard on 18 Nov 2023
  151. Last observed by Andy Lazere on 23 Nov 1999
  152. Last observed by Rhonda Howard on 6 Sep 2023
  153. Last observed by Brian Daniels on 30 Apr 2005
  154. Last observed by Don Hoechlin on 9 Jan 2022
  155. Last observed by Alan Barbour on 24 Mar 2024
  156. Last observed by Julia Black on 20 Apr 2024
  157. Last observed by John Forbes on 8 Apr 2024
  158. Last observed by Sherry Meddick on 29 Feb 2024
  159. Last observed by Andrea C on 11 Sep 2021
  160. Last observed by John Forbes on 8 Apr 2024
  161. Last observed by Rhonda Howard on 4 Mar 2023
  162. Last observed by Charles Tian on 25 Aug 2022
  163. Last observed by Julia Black on 20 Apr 2024
  164. Last observed by John Forbes on 8 Apr 2024
  165. Last observed by John Forbes on 8 Apr 2024
  166. Last observed by Julia Black on 20 Apr 2024
  167. Last observed by John Forbes on 8 Apr 2024
  168. Last observed by John Forbes on 8 Apr 2024
  169. Last observed by Alexander Lees on 28 Nov 2000
  170. Last observed by John Forbes on 8 Apr 2024
  171. Last observed by Andrea C on 19 Feb 2024
  172. Last observed by Neil Gilbert on 30 Dec 2010
  173. Last observed by Jami Josifek on 5 Mar 2024
  174. Last observed by Karen McKinley on 22 Nov 2022
  175. Last observed by Sharon Granillo on 12 Apr 2024
  176. Last observed by jasper brueggeman on 11 Apr 2023
  177. Last observed by Sharon Granillo on 12 Apr 2024
  178. Last observed by Julia Black on 20 Apr 2024
  179. Last observed by Alan Barbour on 24 Mar 2024
  180. Last observed by Cynthia Case on 4 Mar 2024
  181. Last observed by Julia Black on 20 Apr 2024
  182. Last observed by Steve Glover on 26 Oct 1997
  183. Last observed by Sam Merrill on 10 Mar 2015
  184. Last observed by Sylvie Silverstein on 16 May 2023
  185. Last observed by Cynthia Case on 4 Mar 2024
  186. Last observed by Cynthia Case on 6 Mar 2024
  187. Last observed by Rhonda Howard on 30 Mar 2024
  188. Last observed by Doug Lithgow on 3 Apr 2023
  189. Last observed by Kevin Bergersen on 20 Mar 2024
  190. Last observed by John Forbes on 8 Apr 2024
  191. Last observed by Andrea C on 19 Feb 2024
  192. Last observed by Julia Black on 20 Apr 2024
  193. Last observed by Sasha Cahill on 29 Nov 2021
  194. Last observed by John Forbes on 10 Dec 2022
  195. Last observed by John Forbes on 8 Apr 2024
  196. Last observed by Jami Josifek on 5 Mar 2024
  197. Last observed by John Forbes on 8 Apr 2024
  198. Last observed by Jami Josifek on 8 Apr 2024
  199. Last observed by Jane Schrenzel on 8 Apr 2024
  200. Last observed by Cynthia Case on 3 Oct 2020
  201. Last observed by Anonymous eBirder on 18 Apr 2021
  202. Last observed by Ben Valdez on 8 Apr 2019
  203. Last observed by Julia Black on 20 Apr 2024
  204. Last observed by John Forbes on 8 Apr 2024
  205. Last observed by Kevin Bergersen on 20 Mar 2024
  206. Last observed by Eric Haskell on 8 Apr 2001
  207. Last observed by Trevor Leitz on 17 Mar 2024
  208. Last observed by Rhonda Howard on 9 Dec 2022
  209. Last observed by Julia Black on 20 Apr 2024
  210. Last observed by Will Black on 16 Apr 2023
  211. Last observed by Mike Huang on 17 Apr 2013
  212. Last observed by John Forbes on 8 Apr 2024
  213. Last observed by Greg Cross on 24 Mar 2019
  214. Last observed by Julia Black on 20 Apr 2024
  215. Last observed by Rhonda Howard on 19 May 2023
  216. Last observed by Rhonda Howard on 27 Oct 2019
  217. Last observed by Brian Daniels on 21 Sep 2001
  218. Last observed by John Forbes on 8 Apr 2024
  219. Last observed by John Forbes on 8 Apr 2024
  220. Last observed by Anonymous eBirder on 6 Apr 2017
  221. Last observed by John Forbes on 8 Apr 2024
  222. Last observed by John Forbes on 8 Apr 2024
  223. Last observed by John Forbes on 8 Apr 2024
  224. Last observed by Robert Polkinghorn on 18 Apr 2024
  225. Last observed by Joyce Brady on 11 Oct 2013
  226. Last observed by Larry Cahill on 28 Oct 2017
  227. Last observed by Cynthia Case on 4 Mar 2024
  228. Last observed by Robbie Fischer on 19 Sep 2000
  229. Last observed by Laura Hill on 15 Oct 2022
  230. Last observed by Julia Black on 20 Apr 2024
  231. Last observed by Brian Daniels on 14 Oct 2001
  232. Last observed by John Forbes on 8 Apr 2024
  233. Last observed by Jeff Bray on 22 Aug 2021
  234. Last observed by Julia Black on 20 Apr 2024
  235. Last observed by Peter Gordon on 16 Dec 2021
  236. Last observed by Becky Turley on 15 Oct 2014
  237. Last observed by Steve Sosensky on 18 Oct 2015
  238. Last observed by Roger Schoedl on 17 Oct 2015
  239. Last observed by Robert Polkinghorn on 18 Apr 2024
  240. Last observed by Uma Sachdeva on 17 Jan 2022
  241. Last observed by Brian Daniels on 18 Oct 2003
  242. Last observed by Matthew Grube on 2 Nov 2013
  243. Last observed by Rhonda Howard on 17 Dec 2023
  244. Last observed by Julia Black on 20 Apr 2024
  245. Last observed by Carol Maxwell on 1 Apr 2024
  246. Last observed by Rhonda Howard on 15 Mar 2024
  247. Last observed by Jack Lindahl on 6 May 2019
  248. Last observed by Alexander Lees on 9 Oct 2000
  249. Last observed by John Forbes on 8 Apr 2024
  250. Last observed by john fitch on 28 Oct 2009
  251. Last observed by Sean Kahr on 5 Apr 2023
  252. Last observed by Brian Daniels on 11 Jun 2005
  253. Last observed by Julia Black on 20 Apr 2024
  254. Last observed by Rhonda Howard on 28 Mar 2023
  255. Last observed by Rhonda Howard on 2 Jun 2023
  256. Last observed by Don Hoechlin on 8 May 2021
  257. Last observed by Steve Morris on 14 May 2023
  258. Last observed by Mike Huang on 10 May 2018

Exotic: Provisional (6)

  1. Last observed by Julia Black on 20 Apr 2024
  2. Last observed by Thomas Ford-Hutchinson on 6 May 2012
  3. Last observed by Herb Elliott on 9 Jul 2018
  4. Last observed by Doug Lithgow on 25 Jul 2021
  5. Last observed by John Forbes on 8 Apr 2024
  6. Last observed by Rhonda Howard on 27 Nov 2023

Exotic: Escapee (8)

  1. Last observed by Anonymous eBirder on 2 Feb 2020
  2. Last observed by Neil Gilbert on 15 Jul 2010
  3. Last observed by Kat Avila on 16 Jan 2014
  4. Last observed by Andrea C on 7 Dec 2019
  5. Last observed by Peyton Cook on 30 Sep 2005
  6. Last observed by Eric Haskell on 2 Jan 2001
  7. Last observed by TK Birder on 13 Jul 2019
  8. Last observed by Rhonda Howard on 19 Aug 2018

Hybrids (2)

  1. Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruber
    Last observed by As Is on 4 Dec 2023
  2. Downy x Nuttall's Woodpecker (hybrid) Dryobates pubescens x nuttallii
    Last observed by Steven Mlodinow on 13 Jan 2001

Additional Taxa (44)

  1. Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
    Last observed by Jane Schrenzel on 6 Oct 2023
  2. goose sp. Anatidae (goose sp.)
    Last observed by Rhonda Howard on 25 Feb 2022
  3. Greater/Lesser Scaup Aythya marila/affinis
    Last observed by Brett Badeaux on 6 Dec 2016
  4. duck sp. Anatidae (duck sp.)
    Last observed by Rhonda Howard on 7 Aug 2018
  5. Horned/Eared Grebe Podiceps auritus/nigricollis
    Last observed by Braxton Landsman on 23 Nov 2021
  6. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    Last observed by Rhonda Howard on 23 Oct 2020
  7. swift sp. Apodidae sp.
    Last observed by Rhonda Howard on 13 Sep 2020
  8. Rufous/Allen's Hummingbird Selasphorus rufus/sasin
    Last observed by Barry Spolter on 26 Mar 2024
  9. Selasphorus sp. Selasphorus sp.
    Last observed by Jan Wilson Pehoviack on 23 Mar 2011
  10. hummingbird sp. Trochilidae sp.
    Last observed by Walter Piper on 24 Feb 2024
  11. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    Last observed by Rhonda Howard on 19 Mar 2022
  12. peep sp. Calidris sp. (peep sp.)
    Last observed by Chandra Hulimavu on 3 Apr 2023
  13. shorebird sp. Charadriiformes sp.
    Last observed by Charles Tian on 7 Aug 2022
  14. gull sp. Larinae sp.
    Last observed by As Is on 11 Mar 2024
  15. tern sp. Sterninae sp.
    Last observed by Carla Butz on 22 Apr 2023
  16. cormorant sp. Phalacrocoracidae sp.
    Last observed by Braxton Landsman on 29 Aug 2021
  17. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    Last observed by Elizabeth Olin on 22 Oct 2023
  18. Accipiter sp. Accipiter sp.
    Last observed by Rusty H on 11 Apr 2008
  19. Buteo sp. Buteo sp.
    Last observed by Will Black on 15 Oct 2022
  20. hawk sp. Accipitridae sp. (hawk sp.)
    Last observed by Chandra Hulimavu on 16 Apr 2023
  21. Red-naped/Red-breasted Sapsucker Sphyrapicus nuchalis/ruber
    Last observed by Ellen Tipping on 4 Dec 2023
  22. sapsucker sp. Sphyrapicus sp.
    Last observed by Walter Piper on 11 Jan 2018
  23. woodpecker sp. Picidae sp.
    Last observed by Chuck Schussman on 14 Oct 2022
  24. falcon sp. Falco sp.
    Last observed by Jonathan Nakai on 15 Aug 2017
  25. Amazona sp. Amazona sp.
    Last observed by Peter Gordon on 29 Feb 2024
  26. large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.
    Last observed by Anonymous eBirder on 2 May 2017
  27. parakeet sp. Psittaciformes sp. (parakeet sp.)
    Last observed by Larry Cahill on 25 Apr 2018
  28. Empidonax sp. Empidonax sp.
    Last observed by Anonymous eBirder on 23 Apr 2020
  29. Myiarchus sp. Myiarchus sp.
    Last observed by Rhonda Howard on 21 Apr 2023
  30. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    Last observed by Elizabeth Olin on 28 Aug 2022
  31. new world flycatcher sp. Tyrannidae sp.
    Last observed by Rhonda Howard on 30 Sep 2021
  32. Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus
    Last observed by Anonymous eBirder on 28 Apr 2021
  33. crow/raven sp. Corvus sp.
    Last observed by Kenneth Franklin on 28 Aug 2023
  34. swallow sp. Hirundinidae sp.
    Last observed by Rhonda Howard on 8 Jun 2023
  35. Zosterops sp. Zosterops sp.
    Last observed by Rhonda Howard on 24 Feb 2022
  36. wren sp. Troglodytidae sp.
    Last observed by Sasha Cahill on 23 Jul 2022
  37. Acanthis/Spinus sp. Acanthis/Spinus sp.
    Last observed by Walter Piper on 4 Apr 2018
  38. new world sparrow sp. Passerellidae sp.
    Last observed by Jax Sanders on 6 Oct 2018
  39. Bullock's/Baltimore Oriole Icterus bullockii/galbula
    Last observed by Brian Daniels on 1 Jan 2000
  40. new world oriole sp. Icterus sp.
    Last observed by Braxton Landsman on 25 Mar 2023
  41. blackbird sp. Icteridae sp.
    Last observed by Walter Piper on 24 Sep 2018
  42. Setophaga sp. Setophaga sp.
    Last observed by Neil Gilbert on 11 Jun 2010
  43. new world warbler sp. Parulidae sp.
    Last observed by Charles Tian on 7 Aug 2022
  44. passerine sp. Passeriformes sp.
    Last observed by Braxton Landsman on 25 Mar 2023