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Bird List

Updated ~3 minutes ago
177 All Years 51 This Year 2024 29 This Month Apr 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (177)

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

Hybrids (2)

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

Additional Taxa (36)

  1. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 4
    Date:
    Observer: Moses Michelsohn
    Location: Alcatraz Island
  2. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    # Count: 1
    Date:
    Observer: Jeff Acuff
    Location: Alcatraz Island
  3. hummingbird sp. Trochilidae sp.
    # Count: 1
    Date:
    Observer: Shauna Cotrell
    Location: Alcatraz Island
  4. Larus sp. Larus sp.
    # Count: 80
    Date:
    Observer: Matee Manakitivipart
    Location: Alcatraz Island
  5. loon sp. Gavia sp.
    # Count: 3
    Date:
    Observer: Matee Manakitivipart
    Location: Alcatraz Island
  6. crow/raven sp. Corvus sp.
    # Count: 4
    Date:
    Observer: Matee Manakitivipart
    Location: Alcatraz Island
  7. cormorant sp. Phalacrocoracidae sp.
    # Count: 5
    Date:
    Observer: Brad Porter
    Location: Alcatraz Island
  8. gull sp. Larinae sp.
    # Count: 50
    Date:
    Observer: Travis Smith
    Location: Alcatraz Island
  9. tern sp. Sterninae sp.
    # Count: 30
    Date:
    Observer: Dylan Jackson
    Location: Alcatraz Island
  10. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    # Count: 2
    Date:
    Observer: Guillermo Navalon
    Location: Alcatraz Island
  11. goose sp. Anatidae (goose sp.)
    # Count: 8
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  12. new world sparrow sp. Passerellidae sp.
    # Count: 4
    Date:
    Observer: Ken S
    Location: Alcatraz Island
  13. scoter sp. Melanitta sp.
    # Count: 1
    Date:
    Observer: kimberlie moutoux
    Location: Alcatraz Island
  14. new world warbler sp. Parulidae sp.
    # Count: 2
    Date:
    Observer: Adrian Strong
    Location: Alcatraz Island
  15. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Josiah MT Clark
    Location: Alcatraz Island
  16. passerine sp. Passeriformes sp.
    # Count: 6
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  17. House/Purple Finch Haemorhous mexicanus/purpureus
    # Count: 4
    Date:
    Observer: Michelle Leversee
    Location: Alcatraz Island
  18. duck sp. Anatidae (duck sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  19. pigeon/dove sp. Columbidae sp.
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  20. swift sp. Apodidae sp.
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  21. Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticus
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  22. jaeger sp. Stercorarius sp. (jaeger sp.)
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  23. Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostris
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  24. shearwater sp. Procellariidae sp. (shearwater sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  25. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  26. falcon sp. Falco sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  27. Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenys
    # Count: 8
    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. swallow sp. Hirundinidae sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  32. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    # Count: 2
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  33. blackbird sp. Icteridae sp.
    # Count: 1
    Date:
    Observer: Caleb Powell
    Location: Alcatraz Island
  34. wren sp. Troglodytidae sp.
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  35. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 1
    Date:
    Observer: Natural Resources
    Location: Alcatraz Island
  36. Rufous/Allen's Hummingbird Selasphorus rufus/sasin
    # Count: 1
    Date:
    Observer: stephen carter
    Location: Alcatraz Island