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Alcatraz Island

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Bird List

Updated ~10 seconds ago
178 All Years 57 This Year 2024 28 This Month Jun 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (178)

  1. Western Gull Larus occidentalis
    # Count: 100
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  2. Snow Goose Anser caerulescens
    # Count: 35
    Date:
    Observer: kimberlie moutoux
    Location: Alcatraz Island
  3. Northern Pintail Anas acuta
    # Count: 26
    Date:
    Observer: David Assmann
    Location: Alcatraz Island
  4. White-faced Ibis Plegadis chihi
    # Count: 12
    Date:
    Observer: EM Ganin
    Location: Alcatraz Island
  5. Black-bellied Plover Pluvialis squatarola
    # Count: 10
    Date:
    Observer: Simon Harvey
    Location: Alcatraz Island
  6. Black Turnstone Arenaria melanocephala
    # Count: 10
    Date:
    Observer: John Luther
    Location: Alcatraz Island
  7. Surfbird Calidris virgata
    # Count: 10
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  8. Western Sandpiper Calidris mauri
    # Count: 10
    Date:
    Observer: Adrian Strong
    Location: Alcatraz Island
  9. House Finch Haemorhous mexicanus
    # Count: 10
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  10. Purple Finch Haemorhous purpureus
    # Count: 10
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  11. Willet Tringa semipalmata
    # Count: 6
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  12. American White Pelican Pelecanus erythrorhynchos
    # Count: 6
    Date:
    Observer: Elizabeth Crouthamel
    Location: Alcatraz Island
  13. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 5
    Date:
    Observer: Richard Horrigan
    Location: Alcatraz Island
  14. Least Sandpiper Calidris minutilla
    # Count: 5
    Date:
    Observer: Connor Cochrane
    Location: Alcatraz Island
  15. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 5
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  16. Golden-crowned Kinglet Regulus satrapa
    # Count: 5
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  17. European Starling Sturnus vulgaris
    # Count: 5
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  18. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 5
    Date:
    Observer: Van Truan
    Location: Alcatraz Island
  19. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 4
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  20. Hutton's Vireo Vireo huttoni
    # Count: 4
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  21. Surf Scoter Melanitta perspicillata
    # Count: 3
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  22. Red-breasted Merganser Mergus serrator
    # Count: 3
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  23. Common Murre Uria aalge
    # Count: 3
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  24. American Goldfinch Spinus tristis
    # Count: 3
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  25. Fox Sparrow Passerella iliaca
    # Count: 3
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  26. Cackling Goose Branta hutchinsii
    # Count: 2
    Date:
    Observer: Amrish Bidaye
    Location: Alcatraz Island
  27. White-winged Scoter Melanitta deglandi
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  28. Anna's Hummingbird Calypte anna
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  29. Black-necked Stilt Himantopus mexicanus
    # Count: 2
    Date:
    Observer: Matthew Fuirst
    Location: Alcatraz Island
  30. American Avocet Recurvirostra americana
    # Count: 2
    Date:
    Observer: Matthew Fuirst
    Location: Alcatraz Island
  31. Black Oystercatcher Haematopus bachmani
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  32. Semipalmated Plover Charadrius semipalmatus
    # Count: 2
    Date:
    Observer: Jim Buxton
    Location: Alcatraz Island
  33. Spotted Sandpiper Actitis macularius
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  34. Dunlin Calidris alpina
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  35. Heermann's Gull Larus heermanni
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  36. Short-billed Gull Larus brachyrhynchus
    # Count: 2
    Date:
    Observer: Rodney Thomas
    Location: Alcatraz Island
  37. Forster's Tern Sterna forsteri
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  38. Elegant Tern Thalasseus elegans
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  39. Double-crested Cormorant Nannopterum auritum
    # Count: 2
    Date:
    Observer: John Luther
    Location: Alcatraz Island
  40. Brown Pelican Pelecanus occidentalis
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  41. Acorn Woodpecker Melanerpes formicivorus
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  42. Steller's Jay Cyanocitta stelleri
    # Count: 2
    Date:
    Observer: C Whittle
    Location: Alcatraz Island
  43. California Scrub-Jay Aphelocoma californica
    # Count: 2
    Date:
    Observer: stephen carter
    Location: Alcatraz Island
  44. Bushtit Psaltriparus minimus
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  45. Savannah Sparrow Passerculus sandwichensis
    # Count: 2
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  46. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  47. Tricolored Blackbird Agelaius tricolor
    # Count: 2
    Date:
    Observer: Jim Buxton
    Location: Alcatraz Island
  48. Brown-headed Cowbird Molothrus ater
    # Count: 2
    Date:
    Observer: Van Truan
    Location: Alcatraz Island
  49. Great-tailed Grackle Quiscalus mexicanus
    # Count: 2
    Date:
    Observer: stephen carter
    Location: Alcatraz Island
  50. Canada Goose Branta canadensis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  51. Greater Scaup Aythya marila
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  52. Lesser Scaup Aythya affinis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  53. Black Scoter Melanitta americana
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  54. Long-tailed Duck Clangula hyemalis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  55. Bufflehead Bucephala albeola
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  56. Common Goldeneye Bucephala clangula
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  57. Ruddy Duck Oxyura jamaicensis
    # Count: 1
    Date:
    Observer: Deven Kammerichs-Berke
    Location: Alcatraz Island
  58. Horned Grebe Podiceps auritus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  59. Red-necked Grebe Podiceps grisegena
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  60. Eared Grebe Podiceps nigricollis
    # Count: 1
    Date:
    Observer: Tim Knittel
    Location: Alcatraz Island
  61. Clark's Grebe Aechmophorus clarkii
    # Count: 1
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  62. Band-tailed Pigeon Patagioenas fasciata
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  63. American Coot Fulica americana
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  64. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Beverly Cronin
    Location: Alcatraz Island
  65. Whimbrel Numenius phaeopus
    # Count: 1
    Date:
    Observer: Peter Sullivan
    Location: Alcatraz Island
  66. Long-billed Curlew Numenius americanus
    # Count: 1
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  67. Wandering Tattler Tringa incana
    # Count: 1
    Date:
    Observer: John Luther
    Location: Alcatraz Island
  68. Ruddy Turnstone Arenaria interpres
    # Count: 1
    Date:
    Observer: John Luther
    Location: Alcatraz Island
  69. Parasitic Jaeger Stercorarius parasiticus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  70. Marbled Murrelet Brachyramphus marmoratus
    # Count: 1
    Date:
    Observer: Robert Lewis
    Location: Alcatraz Island
  71. Pigeon Guillemot Cepphus columba
    # Count: 1
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  72. Ancient Murrelet Synthliboramphus antiquus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  73. Black-legged Kittiwake Rissa tridactyla
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  74. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  75. Black Skimmer Rynchops niger
    # Count: 1
    Date:
    Observer: Gretchen Tremoulet
    Location: Alcatraz Island
  76. Red-throated Loon Gavia stellata
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  77. Common Loon Gavia immer
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  78. Northern Gannet Morus bassanus
    # Count: 1
    Date:
    Observer: Bill Shelmerdine
    Location: Alcatraz Island
  79. Red-footed Booby Sula sula
    # Count: 1
    Date:
    Observer: Cyndi Bakir
    Location: Alcatraz Island
  80. Brown Booby Sula leucogaster
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  81. Nazca Booby Sula granti
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  82. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Marcia Bosscher
    Location: Alcatraz Island
  83. Great Egret Ardea alba
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  84. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  85. Turkey Vulture Cathartes aura
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  86. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  87. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  88. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  89. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  90. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Marbry Hopkins
    Location: Alcatraz Island
  91. Red-shouldered Hawk Buteo lineatus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  92. Broad-winged Hawk Buteo platypterus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  93. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  94. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  95. Barn Owl Tyto alba
    # Count: 1
    Date:
    Observer: Marie Cerda
    Location: Alcatraz Island
  96. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  97. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  98. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Adrian Strong
    Location: Alcatraz Island
  99. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  100. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  101. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  102. Red-masked Parakeet Psittacara erythrogenys
    # Count: 1
    Date:
    Observer: Ken Molczan
    Location: Alcatraz Island
  103. Olive-sided Flycatcher Contopus cooperi
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  104. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  105. Willow Flycatcher Empidonax traillii
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  106. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  107. Black Phoebe Sayornis nigricans
    # Count: 1
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  108. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  109. Western Kingbird Tyrannus verticalis
    # Count: 1
    Date:
    Observer: Richard Horrigan
    Location: Alcatraz Island
  110. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  111. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  112. Tree Swallow Tachycineta bicolor
    # Count: 1
    Date:
    Observer: David Assmann
    Location: Alcatraz Island
  113. Barn Swallow Hirundo rustica
    # Count: 1
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  114. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  115. Red-breasted Nuthatch Sitta canadensis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  116. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: 1
    Date:
    Observer: Michael Pierson
    Location: Alcatraz Island
  117. House Wren Troglodytes aedon
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  118. Pacific Wren Troglodytes pacificus
    # Count: 1
    Date:
    Observer: Chris Bailey cc
    Location: Alcatraz Island
  119. Bewick's Wren Thryomanes bewickii
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  120. Western Bluebird Sialia mexicana
    # Count: 1
    Date:
    Observer: Brian Christensen
    Location: Alcatraz Island
  121. Varied Thrush Ixoreus naevius
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  122. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  123. Cedar Waxwing Bombycilla cedrorum
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  124. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Steve Rottenborn
    Location: Alcatraz Island
  125. Lesser Goldfinch Spinus psaltria
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  126. Chipping Sparrow Spizella passerina
    # Count: 1
    Date:
    Observer: Anay Bapaye
    Location: Alcatraz Island
  127. Lark Sparrow Chondestes grammacus
    # Count: 1
    Date:
    Observer: BB Oros
    Location: Alcatraz Island
  128. Dark-eyed Junco Junco hyemalis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  129. White-throated Sparrow Zonotrichia albicollis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  130. Lincoln's Sparrow Melospiza lincolnii
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  131. California Towhee Melozone crissalis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  132. Spotted Towhee Pipilo maculatus
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  133. Western Meadowlark Sturnella neglecta
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  134. Hooded Oriole Icterus cucullatus
    # Count: 1
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  135. Bullock's Oriole Icterus bullockii
    # Count: 1
    Date:
    Observer: Mary McMahon
    Location: Alcatraz Island
  136. Red-winged Blackbird Agelaius phoeniceus
    # Count: 1
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  137. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  138. Virginia's Warbler Leiothlypis virginiae
    # Count: 1
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  139. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  140. Black-throated Gray Warbler Setophaga nigrescens
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  141. Hermit Warbler Setophaga occidentalis
    # Count: 1
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  142. Wilson's Warbler Cardellina pusilla
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  143. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  144. Brant Branta bernicla
    # Count: X
    Date:
    Observer: Mark & Barbara Hoffman
    Location: Alcatraz Island
  145. Mallard Anas platyrhynchos
    # Count: X
    Date:
    Observer: Bernard Goulet
    Location: Alcatraz Island
  146. Pied-billed Grebe Podilymbus podiceps
    # Count: X
    Date:
    Observer: Curtis McCamy
    Location: Alcatraz Island
  147. Western Grebe Aechmophorus occidentalis
    # Count: X
    Date:
    Observer: Wayne Palsson
    Location: Alcatraz Island
  148. Rock Pigeon Columba livia
    # Count: X
    Date:
    Observer: Jody Enck
    Location: Alcatraz Island
  149. Mourning Dove Zenaida macroura
    # Count: X
    Date:
    Observer: Steve Rottenborn
    Location: Alcatraz Island
  150. White-throated Swift Aeronautes saxatalis
    # Count: X
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  151. Allen's Hummingbird Selasphorus sasin
    # Count: X
    Date:
    Observer: Bly Bylsma
    Location: Alcatraz Island
  152. Red-necked Phalarope Phalaropus lobatus
    # Count: X
    Date:
    Observer: Mark & Barbara Hoffman
    Location: Alcatraz Island
  153. Ring-billed Gull Larus delawarensis
    # Count: X
    Date:
    Observer: Jody Enck
    Location: Alcatraz Island
  154. Herring Gull Larus argentatus
    # Count: X
    Date:
    Observer: Jody Enck
    Location: Alcatraz Island
  155. California Gull Larus californicus
    # Count: X
    Date:
    Observer: Jody Enck
    Location: Alcatraz Island
  156. Glaucous-winged Gull Larus glaucescens
    # Count: X
    Date:
    Observer: Gary Meyer
    Location: Alcatraz Island
  157. Caspian Tern Hydroprogne caspia
    # Count: X
    Date:
    Observer: Steve Rottenborn
    Location: Alcatraz Island
  158. Pacific Loon Gavia pacifica
    # Count: X
    Date:
    Observer: Ray Deeney
    Location: Alcatraz Island
  159. Brandt's Cormorant Urile penicillatus
    # Count: X
    Date:
    Observer: John Luther
    Location: Alcatraz Island
  160. Pelagic Cormorant Urile pelagicus
    # Count: X
    Date:
    Observer: Ann Hobbs
    Location: Alcatraz Island
  161. Snowy Egret Egretta thula
    # Count: X
    Date:
    Observer: Virgil Troyer
    Location: Alcatraz Island
  162. American Kestrel Falco sparverius
    # Count: X
    Date:
    Observer: Wayne Palsson
    Location: Alcatraz Island
  163. American Crow Corvus brachyrhynchos
    # Count: X
    Date:
    Observer: Daniel Lebbin
    Location: Alcatraz Island
  164. Chestnut-backed Chickadee Poecile rufescens
    # Count: X
    Date:
    Observer: Mark & Barbara Hoffman
    Location: Alcatraz Island
  165. Violet-green Swallow Tachycineta thalassina
    # Count: X
    Date:
    Observer: Matthew Zlatunich
    Location: Alcatraz Island
  166. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: X
    Date:
    Observer: Mark & Barbara Hoffman
    Location: Alcatraz Island
  167. Cliff Swallow Petrochelidon pyrrhonota
    # Count: X
    Date:
    Observer: Mike Taylor
    Location: Alcatraz Island
  168. Rock Wren Salpinctes obsoletus
    # Count: X
    Date:
    Observer: Robert Lewis
    Location: Alcatraz Island
  169. Marsh Wren Cistothorus palustris
    # Count: X
    Date:
    Observer: Mark & Barbara Hoffman
    Location: Alcatraz Island
  170. Northern Mockingbird Mimus polyglottos
    # Count: X
    Date:
    Observer: Lisa Lister
    Location: Alcatraz Island
  171. American Robin Turdus migratorius
    # Count: X
    Date:
    Observer: Wayne Palsson
    Location: Alcatraz Island
  172. House Sparrow Passer domesticus
    # Count: X
    Date:
    Observer: Jody Enck
    Location: Alcatraz Island
  173. White-crowned Sparrow Zonotrichia leucophrys
    # Count: X
    Date:
    Observer: Wayne Palsson
    Location: Alcatraz Island
  174. Golden-crowned Sparrow Zonotrichia atricapilla
    # Count: X
    Date:
    Observer: Gary Meyer
    Location: Alcatraz Island
  175. Nashville Warbler Leiothlypis ruficapilla
    # Count: X
    Date:
    Observer: Tobias Rohmer
    Location: Alcatraz Island
  176. Yellow Warbler Setophaga petechia
    # Count: X
    Date:
    Observer: Kayo Roy
    Location: Alcatraz Island
  177. Yellow-rumped Warbler Setophaga coronata
    # Count: X
    Date:
    Observer: Ray Deeney
    Location: Alcatraz Island
  178. Townsend's Warbler Setophaga townsendi
    # Count: X
    Date:
    Observer: Kayo Roy
    Location: Alcatraz Island

Hybrids (2)

  1. Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
    # Count: 3
    Date:
    Observer: logan kahle
    Location: Alcatraz Island
  2. Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescens
    # Count: X
    Date:
    Observer: Bill Shelmerdine
    Location: Alcatraz Island

Additional Taxa (36)

  1. Larus sp. Larus sp.
    # Count: 60
    Date:
    Observer: Fernando del Valle
    Location: Alcatraz Island
  2. crow/raven sp. Corvus sp.
    # Count: 60
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  3. gull sp. Larinae sp.
    # Count: 10
    Date:
    Observer: Isaac Miller
    Location: Alcatraz Island
  4. Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenys
    # Count: 8
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  5. passerine sp. Passeriformes sp.
    # Count: 6
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  6. pigeon/dove sp. Columbidae sp.
    # Count: 3
    Date:
    Observer: stephen covey
    Location: Alcatraz Island
  7. House/Purple Finch Haemorhous mexicanus/purpureus
    # Count: 3
    Date:
    Observer: Bruce King
    Location: Alcatraz Island
  8. goose sp. Anatidae (goose sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  9. scoter sp. Melanitta sp.
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  10. duck sp. Anatidae (duck sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  11. swift sp. Apodidae sp.
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  12. Rufous/Allen's Hummingbird Selasphorus rufus/sasin
    # Count: 2
    Date:
    Observer: stephen carter
    Location: Alcatraz Island
  13. hummingbird sp. Trochilidae sp.
    # Count: 2
    Date:
    Observer: Richard Erickson
    Location: Alcatraz Island
  14. Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostris
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  15. shearwater sp. Procellariidae sp. (shearwater sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  16. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  17. new world warbler sp. Parulidae sp.
    # Count: 2
    Date:
    Observer: Adrian Strong
    Location: Alcatraz Island
  18. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  19. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 1
    Date:
    Observer: Amy McDonald
    Location: Alcatraz Island
  20. Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticus
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  21. jaeger sp. Stercorarius sp. (jaeger sp.)
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  22. tern sp. Sterninae sp.
    # Count: 1
    Date:
    Observer: Van Truan
    Location: Alcatraz Island
  23. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Richard Horrigan
    Location: Alcatraz Island
  24. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  25. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  26. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  27. falcon sp. Falco sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  28. Psittacara sp. Psittacara sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  29. large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  30. vireo sp. Vireo sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  31. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  32. swallow sp. Hirundinidae sp.
    # Count: 1
    Date:
    Observer: Rosemary Joslin
    Location: Alcatraz Island
  33. wren sp. Troglodytidae sp.
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  34. new world sparrow sp. Passerellidae sp.
    # Count: 1
    Date:
    Observer: Elizabeth Crouthamel
    Location: Alcatraz Island
  35. blackbird sp. Icteridae sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  36. cormorant sp. Phalacrocoracidae sp.
    # Count: X
    Date:
    Observer: Wayne Palsson
    Location: Alcatraz Island