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Yerba Buena Island / Treasure Island

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Bird List

Updated ~6 seconds ago
151 All Years 57 This Year 2024 0 This Month May 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (151)

  1. Canada Goose Branta canadensis
    # Count: 5
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  2. Bufflehead Bucephala albeola
    # Count: 2
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  3. Western Grebe Aechmophorus occidentalis
    # Count: 23
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  4. Anna's Hummingbird Calypte anna
    # Count: 3
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  5. Western Gull Larus occidentalis
    # Count: 7
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  6. California Gull Larus californicus
    # Count: 3
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  7. Double-crested Cormorant Nannopterum auritum
    # Count: 2
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  8. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  9. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  10. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  11. Black Phoebe Sayornis nigricans
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  12. American Crow Corvus brachyrhynchos
    # Count: 9
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  13. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  14. European Starling Sturnus vulgaris
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  15. American Robin Turdus migratorius
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  16. House Sparrow Passer domesticus
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  17. House Finch Haemorhous mexicanus
    # Count: 18
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  18. Lesser Goldfinch Spinus psaltria
    # Count: 2
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  19. Dark-eyed Junco Junco hyemalis
    # Count: 5
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  20. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 15
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  21. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  22. California Towhee Melozone crissalis
    # Count: 1
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  23. Yellow-rumped Warbler Setophaga coronata
    # Count: 3
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  24. Greater Scaup Aythya marila
    # Count: 8
    Date:
    Observer: Steve Schulz
    Location: Yerba Buena Island / Treasure Island
  25. Red-throated Loon Gavia stellata
    # Count: 3
    Date:
    Observer: Steve Schulz
    Location: Yerba Buena Island / Treasure Island
  26. Turkey Vulture Cathartes aura
    # Count: 2
    Date:
    Observer: Steve Schulz
    Location: Yerba Buena Island / Treasure Island
  27. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Steve Schulz
    Location: Yerba Buena Island / Treasure Island
  28. Golden-crowned Sparrow Zonotrichia atricapilla
    # Count: 8
    Date:
    Observer: Steve Schulz
    Location: Yerba Buena Island / Treasure Island
  29. Greater White-fronted Goose Anser albifrons
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  30. Spotted Sandpiper Actitis macularius
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  31. Surfbird Calidris virgata
    # Count: 4
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  32. Short-billed Gull Larus brachyrhynchus
    # Count: 4
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  33. Common Loon Gavia immer
    # Count: 4
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  34. Pelagic Cormorant Urile pelagicus
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  35. Say's Phoebe Sayornis saya
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  36. Surf Scoter Melanitta perspicillata
    # Count: 3
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  37. Chestnut-backed Chickadee Poecile rufescens
    # Count: 3
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  38. Ruby-crowned Kinglet Corthylio calendula
    # Count: 2
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  39. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  40. Townsend's Warbler Setophaga townsendi
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  41. Horned Grebe Podiceps auritus
    # Count: 2
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  42. Brandt's Cormorant Urile penicillatus
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  43. Brown Pelican Pelecanus occidentalis
    # Count: 7
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  44. Red-shouldered Hawk Buteo lineatus
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  45. Northern Flicker Colaptes auratus
    # Count: 2
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  46. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  47. California Scrub-Jay Aphelocoma californica
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  48. Bushtit Psaltriparus minimus
    # Count: 12
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  49. Hermit Thrush Catharus guttatus
    # Count: 5
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  50. Fox Sparrow Passerella iliaca
    # Count: 6
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  51. Lincoln's Sparrow Melospiza lincolnii
    # Count: 5
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  52. Cackling Goose Branta hutchinsii
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  53. Ruddy Duck Oxyura jamaicensis
    # Count: 4
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  54. Eared Grebe Podiceps nigricollis
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  55. Rock Pigeon Columba livia
    # Count: 20
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  56. American Coot Fulica americana
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  57. Glaucous-winged Gull Larus glaucescens
    # Count: 4
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  58. Snow Goose Anser caerulescens
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  59. Lesser Scaup Aythya affinis
    # Count: 3
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  60. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 12
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  61. Killdeer Charadrius vociferus
    # Count: 4
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  62. Semipalmated Plover Charadrius semipalmatus
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  63. Ring-billed Gull Larus delawarensis
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  64. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  65. Western Meadowlark Sturnella neglecta
    # Count: 5
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  66. Herring Gull Larus argentatus
    # Count: 1
    Date:
    Observer: Clayton Rucker
    Location: Yerba Buena Island / Treasure Island
  67. Elegant Tern Thalasseus elegans
    # Count: 1
    Date:
    Observer: Clayton Rucker
    Location: Yerba Buena Island / Treasure Island
  68. Common Raven Corvus corax
    # Count: 3
    Date:
    Observer: Clayton Rucker
    Location: Yerba Buena Island / Treasure Island
  69. Red-breasted Nuthatch Sitta canadensis
    # Count: 1
    Date:
    Observer: Clayton Rucker
    Location: Yerba Buena Island / Treasure Island
  70. Nashville Warbler Leiothlypis ruficapilla
    # Count: 1
    Date:
    Observer: Clayton Rucker
    Location: Yerba Buena Island / Treasure Island
  71. Heermann's Gull Larus heermanni
    # Count: 2
    Date:
    Observer: Gjon Hazard
    Location: Yerba Buena Island / Treasure Island
  72. Mallard Anas platyrhynchos
    # Count: 2
    Date:
    Observer: Sue Cossins
    Location: Yerba Buena Island / Treasure Island
  73. Black Skimmer Rynchops niger
    # Count: 3
    Date:
    Observer: Stacey M. Hollis
    Location: Yerba Buena Island / Treasure Island
  74. Pygmy Nuthatch Sitta pygmaea
    # Count: 2
    Date:
    Observer: Eddie Bartley
    Location: Yerba Buena Island / Treasure Island
  75. Common Goldeneye Bucephala clangula
    # Count: 2
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  76. Red-breasted Merganser Mergus serrator
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  77. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  78. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 1
    Date:
    Observer: Marty Freeland
    Location: Yerba Buena Island / Treasure Island
  79. American Pipit Anthus rubescens
    # Count: 1
    Date:
    Observer: Marty Freeland
    Location: Yerba Buena Island / Treasure Island
  80. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Jaime Chaves
    Location: Yerba Buena Island / Treasure Island
  81. Clark's Grebe Aechmophorus clarkii
    # Count: 2
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  82. Black Oystercatcher Haematopus bachmani
    # Count: 1
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  83. Caspian Tern Hydroprogne caspia
    # Count: 3
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  84. Snowy Egret Egretta thula
    # Count: 1
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  85. Great Egret Ardea alba
    # Count: 1
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  86. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Kevin Steen
    Location: Yerba Buena Island / Treasure Island
  87. Common Murre Uria aalge
    # Count: 2
    Date:
    Observer: Van Pierszalowski
    Location: Yerba Buena Island / Treasure Island
  88. Pigeon Guillemot Cepphus columba
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  89. Tricolored Blackbird Agelaius tricolor
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  90. Swainson's Hawk Buteo swainsoni
    # Count: 2
    Date:
    Observer: Eddie Bartley
    Location: Yerba Buena Island / Treasure Island
  91. Northern Mockingbird Mimus polyglottos
    # Count: 1
    Date:
    Observer: Eddie Bartley
    Location: Yerba Buena Island / Treasure Island
  92. Wilson's Warbler Cardellina pusilla
    # Count: 2
    Date:
    Observer: Eddie Bartley
    Location: Yerba Buena Island / Treasure Island
  93. Mourning Dove Zenaida macroura
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  94. Least Sandpiper Calidris minutilla
    # Count: 3
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  95. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  96. Sanderling Calidris alba
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  97. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  98. American White Pelican Pelecanus erythrorhynchos
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  99. Savannah Sparrow Passerculus sandwichensis
    # Count: 1
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  100. Black-bellied Plover Pluvialis squatarola
    # Count: 4
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  101. Short-billed Dowitcher Limnodromus griseus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  102. Yellow Warbler Setophaga petechia
    # Count: 2
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  103. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  104. Pacific Loon Gavia pacifica
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  105. Brown-headed Cowbird Molothrus ater
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  106. Allen's Hummingbird Selasphorus sasin
    # Count: 3
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  107. Western Kingbird Tyrannus verticalis
    # Count: 7
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  108. Barn Swallow Hirundo rustica
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  109. Cedar Waxwing Bombycilla cedrorum
    # Count: 20
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  110. Lawrence's Goldfinch Spinus lawrencei
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  111. Western Bluebird Sialia mexicana
    # Count: 2
    Date:
    Observer: James Castle Gaither Jr
    Location: Yerba Buena Island / Treasure Island
  112. Red-necked Grebe Podiceps grisegena
    # Count: 2
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  113. Brewer's Blackbird Euphagus cyanocephalus
    # Count: X
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  114. White-winged Scoter Melanitta deglandi
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  115. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  116. Bullock's Oriole Icterus bullockii
    # Count: 1
    Date:
    Observer: Henry Burton
    Location: Yerba Buena Island / Treasure Island
  117. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  118. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Augie Kramer
    Location: Yerba Buena Island / Treasure Island
  119. Brown Creeper Certhia americana
    # Count: 1
    Date:
    Observer: Augie Kramer
    Location: Yerba Buena Island / Treasure Island
  120. Spotted Towhee Pipilo maculatus
    # Count: 2
    Date:
    Observer: Augie Kramer
    Location: Yerba Buena Island / Treasure Island
  121. Forster's Tern Sterna forsteri
    # Count: 1
    Date:
    Observer: Rachel Lawrence
    Location: Yerba Buena Island / Treasure Island
  122. Tree Swallow Tachycineta bicolor
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  123. Brant Branta bernicla
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  124. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Noah Arthur
    Location: Yerba Buena Island / Treasure Island
  125. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Noah Arthur
    Location: Yerba Buena Island / Treasure Island
  126. Western Tanager Piranga ludoviciana
    # Count: 2
    Date:
    Observer: Noah Arthur
    Location: Yerba Buena Island / Treasure Island
  127. Pied-billed Grebe Podilymbus podiceps
    # Count: X
    Date:
    Observer: Matt Tarlach
    Location: Yerba Buena Island / Treasure Island
  128. American Goldfinch Spinus tristis
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  129. Red-winged Blackbird Agelaius phoeniceus
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  130. Willet Tringa semipalmata
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  131. Hutton's Vireo Vireo huttoni
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  132. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  133. White-throated Sparrow Zonotrichia albicollis
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  134. Hermit Warbler Setophaga occidentalis
    # Count: 2
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  135. Varied Thrush Ixoreus naevius
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  136. Ross's Goose Anser rossii
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  137. Acorn Woodpecker Melanerpes formicivorus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  138. Olive-sided Flycatcher Contopus cooperi
    # Count: 3
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  139. Parasitic Jaeger Stercorarius parasiticus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  140. Willow Flycatcher Empidonax traillii
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  141. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  142. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  143. Black Turnstone Arenaria melanocephala
    # Count: 4
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  144. Lucy's Warbler Leiothlypis luciae
    # Count: X
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  145. Dunlin Calidris alpina
    # Count: 55
    Date:
    Observer: Ray Hasey
    Location: Yerba Buena Island / Treasure Island
  146. Western Sandpiper Calidris mauri
    # Count: 29
    Date:
    Observer: Ray Hasey
    Location: Yerba Buena Island / Treasure Island
  147. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: Ray Hasey
    Location: Yerba Buena Island / Treasure Island
  148. Great Horned Owl Bubo virginianus
    # Count: 1
    Date:
    Observer: Ray Hasey
    Location: Yerba Buena Island / Treasure Island
  149. Marbled Godwit Limosa fedoa
    # Count: X
    Date:
    Observer: James Beatty
    Location: Yerba Buena Island / Treasure Island
  150. Long-tailed Duck Clangula hyemalis
    # Count: X
    Date:
    Observer: Dixie Burkhart
    Location: Yerba Buena Island / Treasure Island
  151. Northern Shrike Lanius borealis
    # Count: X
    Date:
    Observer: Dixie Burkhart
    Location: Yerba Buena Island / Treasure Island

Hybrids (2)

  1. Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescens
    # Count: 1
    Date:
    Observer: Tristan Yoo
    Location: Yerba Buena Island / Treasure Island
  2. Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
    # Count: 1
    Date:
    Observer: Marty Freeland
    Location: Yerba Buena Island / Treasure Island

Additional Taxa (16)

  1. swallow sp. Hirundinidae sp.
    # Count: 3
    Date:
    Observer: Crima Pogge
    Location: Yerba Buena Island / Treasure Island
  2. new world oriole sp. Icterus sp.
    # Count: 1
    Date:
    Observer: Cédric Duhalde
    Location: Yerba Buena Island / Treasure Island
  3. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 2
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  4. Larus sp. Larus sp.
    # Count: 10
    Date:
    Observer: Nina Bai
    Location: Yerba Buena Island / Treasure Island
  5. duck sp. Anatidae (duck sp.)
    # Count: 5
    Date:
    Observer: Tristan Yoo
    Location: Yerba Buena Island / Treasure Island
  6. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 10
    Date:
    Observer: Sue Cossins
    Location: Yerba Buena Island / Treasure Island
  7. gull sp. Larinae sp.
    # Count: X
    Date:
    Observer: Sue Cossins
    Location: Yerba Buena Island / Treasure Island
  8. cormorant sp. Phalacrocoracidae sp.
    # Count: 35
    Date:
    Observer: Sue Cossins
    Location: Yerba Buena Island / Treasure Island
  9. Buteo sp. Buteo sp.
    # Count: 2
    Date:
    Observer: Eddie Bartley
    Location: Yerba Buena Island / Treasure Island
  10. hummingbird sp. Trochilidae sp.
    # Count: 2
    Date:
    Observer: BB Oros
    Location: Yerba Buena Island / Treasure Island
  11. Zonotrichia sp. Zonotrichia sp.
    # Count: 100
    Date:
    Observer: logan kahle
    Location: Yerba Buena Island / Treasure Island
  12. Horned/Eared Grebe Podiceps auritus/nigricollis
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  13. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Rachel Lawrence
    Location: Yerba Buena Island / Treasure Island
  14. new world warbler sp. Parulidae sp.
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  15. new world goldfinch sp. Spinus sp. (goldfinch sp.)
    # Count: X
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island
  16. tern sp. Sterninae sp.
    # Count: 1
    Date:
    Observer: Aaron Maizlish
    Location: Yerba Buena Island / Treasure Island