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Mercer Slough

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Bird List

Updated ~8 seconds ago
150 All Years 75 This Year 2024 39 This Month Jun 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (150)

  1. Band-tailed Pigeon Patagioenas fasciata
    # Count: 4
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  2. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  3. Chestnut-backed Chickadee Poecile rufescens
    # Count: 3
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  4. Bushtit Psaltriparus minimus
    # Count: 1
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  5. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  6. American Robin Turdus migratorius
    # Count: 2
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  7. Cedar Waxwing Bombycilla cedrorum
    # Count: 1
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  8. Spotted Towhee Pipilo maculatus
    # Count: 2
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  9. Yellow Warbler Setophaga petechia
    # Count: 1
    Date:
    Observer: Ada Ye
    Location: Mercer Slough
  10. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Lena Shoeman
    Location: Mercer Slough
  11. American Crow Corvus brachyrhynchos
    # Count: 3
    Date:
    Observer: Lena Shoeman
    Location: Mercer Slough
  12. Purple Finch Haemorhous purpureus
    # Count: 2
    Date:
    Observer: Lena Shoeman
    Location: Mercer Slough
  13. Dark-eyed Junco Junco hyemalis
    # Count: 2
    Date:
    Observer: Lena Shoeman
    Location: Mercer Slough
  14. Black-capped Chickadee Poecile atricapillus
    # Count: 2
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  15. Violet-green Swallow Tachycineta thalassina
    # Count: 3
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  16. Brown Creeper Certhia americana
    # Count: 1
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  17. Marsh Wren Cistothorus palustris
    # Count: 1
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  18. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  19. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  20. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: Danver Hartop
    Location: Mercer Slough
  21. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  22. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  23. Canada Goose Branta canadensis
    # Count: 9
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  24. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  25. Barn Swallow Hirundo rustica
    # Count: 9
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  26. Wood Duck Aix sponsa
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  27. Gadwall Mareca strepera
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  28. Anna's Hummingbird Calypte anna
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  29. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  30. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  31. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  32. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  33. Tree Swallow Tachycineta bicolor
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  34. European Starling Sturnus vulgaris
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  35. Brown-headed Cowbird Molothrus ater
    # Count: 4
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  36. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Tad Bradley
    Location: Mercer Slough
  37. Purple Martin Progne subis
    # Count: 2
    Date:
    Observer: Tad Bradley
    Location: Mercer Slough
  38. Rufous Hummingbird Selasphorus rufus
    # Count: 2
    Date:
    Observer: Leah Im
    Location: Mercer Slough
  39. Bewick's Wren Thryomanes bewickii
    # Count: X
    Date:
    Observer: Anonymous eBirder
    Location: Mercer Slough
  40. Mallard Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  41. American Goldfinch Spinus tristis
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  42. Red-breasted Sapsucker Sphyrapicus ruber
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  43. Red-breasted Nuthatch Sitta canadensis
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  44. Red-winged Blackbird Agelaius phoeniceus
    # Count: 1
    Date:
    Observer: Lyn Boorman
    Location: Mercer Slough
  45. American Wigeon Mareca americana
    # Count: 2
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  46. Golden-crowned Kinglet Regulus satrapa
    # Count: 2
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  47. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 3
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  48. Orange-crowned Warbler Leiothlypis celata
    # Count: 2
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  49. Townsend's Warbler Setophaga townsendi
    # Count: 2
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  50. Wilson's Warbler Cardellina pusilla
    # Count: 1
    Date:
    Observer: Katherine Tishler
    Location: Mercer Slough
  51. Yellow-rumped Warbler Setophaga coronata
    # Count: 1
    Date:
    Observer: Scott Kramer
    Location: Mercer Slough
  52. Steller's Jay Cyanocitta stelleri
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Mercer Slough
  53. Red-tailed Hawk Buteo jamaicensis
    # Count: 8
    Date:
    Observer: Malak Crisp
    Location: Mercer Slough
  54. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Malak Crisp
    Location: Mercer Slough
  55. Bufflehead Bucephala albeola
    # Count: 4
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  56. Common Goldeneye Bucephala clangula
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  57. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  58. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  59. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  60. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  61. House Finch Haemorhous mexicanus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  62. Hooded Merganser Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Edward Allen
    Location: Mercer Slough
  63. Double-crested Cormorant Nannopterum auritum
    # Count: 1
    Date:
    Observer: Edward Allen
    Location: Mercer Slough
  64. Green-winged Teal Anas crecca
    # Count: 9
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  65. Ring-necked Duck Aythya collaris
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  66. Black Phoebe Sayornis nigricans
    # Count: 1
    Date:
    Observer: Milton Vine
    Location: Mercer Slough
  67. Pacific Wren Troglodytes pacificus
    # Count: 1
    Date:
    Observer: Milton Vine
    Location: Mercer Slough
  68. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Milton Vine
    Location: Mercer Slough
  69. Lesser Goldfinch Spinus psaltria
    # Count: 1
    Date:
    Observer: Milton Vine
    Location: Mercer Slough
  70. Virginia Rail Rallus limicola
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  71. Common Merganser Mergus merganser
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  72. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Dave Slager
    Location: Mercer Slough
  73. Golden-crowned Sparrow Zonotrichia atricapilla
    # Count: 2
    Date:
    Observer: E G
    Location: Mercer Slough
  74. Northern Pintail Anas acuta
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  75. Varied Thrush Ixoreus naevius
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  76. Northern Shoveler Spatula clypeata
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  77. Lincoln's Sparrow Melospiza lincolnii
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  78. American Coot Fulica americana
    # Count: 25
    Date:
    Observer: Kevin Wei
    Location: Mercer Slough
  79. Barred Owl Strix varia
    # Count: 1
    Date:
    Observer: Kamella Boullé
    Location: Mercer Slough
  80. Fox Sparrow Passerella iliaca
    # Count: X
    Date:
    Observer: Daniel Bentson
    Location: Mercer Slough
  81. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Heidi Neff
    Location: Mercer Slough
  82. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Bailey Luce
    Location: Mercer Slough
  83. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Kaz Werner
    Location: Mercer Slough
  84. Pileated Woodpecker Dryocopus pileatus
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  85. Willow Flycatcher Empidonax traillii
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  86. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Scott Kramer
    Location: Mercer Slough
  87. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 1
    Date:
    Observer: Garrett Hughes
    Location: Mercer Slough
  88. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 2
    Date:
    Observer: Craige Blackmore
    Location: Mercer Slough
  89. Turkey Vulture Cathartes aura
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  90. Western Kingbird Tyrannus verticalis
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  91. Savannah Sparrow Passerculus sandwichensis
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  92. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: David Zimmerman
    Location: Mercer Slough
  93. Lesser Scaup Aythya affinis
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  94. White-throated Sparrow Zonotrichia albicollis
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  95. Wilson's Snipe Gallinago delicata
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  96. American Bittern Botaurus lentiginosus
    # Count: 1
    Date:
    Observer: Katie Wuestney
    Location: Mercer Slough
  97. Bullock's Oriole Icterus bullockii
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  98. Black-throated Gray Warbler Setophaga nigrescens
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  99. Red Crossbill Loxia curvirostra
    # Count: 1
    Date:
    Observer: Tyler Gonzales
    Location: Mercer Slough
  100. Hammond's Flycatcher Empidonax hammondii
    # Count: 1
    Date:
    Observer: Jennifer Hansen
    Location: Mercer Slough
  101. Cackling Goose Branta hutchinsii
    # Count: 2
    Date:
    Observer: peter carr
    Location: Mercer Slough
  102. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: peter carr
    Location: Mercer Slough
  103. Caspian Tern Hydroprogne caspia
    # Count: 4
    Date:
    Observer: peter carr
    Location: Mercer Slough
  104. Western Screech-Owl Megascops kennicottii
    # Count: 1
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  105. Cassin's Vireo Vireo cassinii
    # Count: 1
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  106. Glaucous-winged Gull Larus glaucescens
    # Count: 2
    Date:
    Observer: Doug Strange
    Location: Mercer Slough
  107. Rock Pigeon Columba livia
    # Count: 5
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  108. American Pipit Anthus rubescens
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  109. California Gull Larus californicus
    # Count: 1
    Date:
    Observer: Kevin Waggoner
    Location: Mercer Slough
  110. Hutton's Vireo Vireo huttoni
    # Count: 1
    Date:
    Observer: Jennifer Vonderwell
    Location: Mercer Slough
  111. California Scrub-Jay Aphelocoma californica
    # Count: 2
    Date:
    Observer: David Mull
    Location: Mercer Slough
  112. Evening Grosbeak Coccothraustes vespertinus
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  113. Red-eyed Vireo Vireo olivaceus
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  114. Spotted Sandpiper Actitis macularius
    # Count: 3
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  115. Chipping Sparrow Spizella passerina
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  116. House Sparrow Passer domesticus
    # Count: 2
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  117. Lazuli Bunting Passerina amoena
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  118. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Megan Lyden
    Location: Mercer Slough
  119. Northern Shrike Lanius borealis
    # Count: 1
    Date:
    Observer: Neil Pankey
    Location: Mercer Slough
  120. Vaux's Swift Chaetura vauxi
    # Count: 1
    Date:
    Observer: Charles Ford
    Location: Mercer Slough
  121. Blue-winged Teal Spatula discors
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  122. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  123. Great Horned Owl Bubo virginianus
    # Count: 1
    Date:
    Observer: Mason Maron
    Location: Mercer Slough
  124. Red-necked Phalarope Phalaropus lobatus
    # Count: 1
    Date:
    Observer: Qinglin Ma
    Location: Mercer Slough
  125. Mourning Dove Zenaida macroura
    # Count: 4
    Date:
    Observer: Don Goodwin
    Location: Mercer Slough
  126. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 4
    Date:
    Observer: Don Goodwin
    Location: Mercer Slough
  127. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Mercer Slough
  128. Eurasian Wigeon Mareca penelope
    # Count: 1
    Date:
    Observer: Emily Larson
    Location: Mercer Slough
  129. Barn Owl Tyto alba
    # Count: 1
    Date:
    Observer: Andrew McCormick
    Location: Mercer Slough
  130. Western Grebe Aechmophorus occidentalis
    # Count: 1
    Date:
    Observer: peter carr
    Location: Mercer Slough
  131. Eastern Kingbird Tyrannus tyrannus
    # Count: 1
    Date:
    Observer: Jen McKeirnan
    Location: Mercer Slough
  132. Ruddy Duck Oxyura jamaicensis
    # Count: 4
    Date:
    Observer: Alex Bennett
    Location: Mercer Slough
  133. Ring-billed Gull Larus delawarensis
    # Count: 4
    Date:
    Observer: John Douglas
    Location: Mercer Slough
  134. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 1
    Date:
    Observer: Jim Prager
    Location: Mercer Slough
  135. Short-billed Gull Larus brachyrhynchus
    # Count: 2
    Date:
    Observer: wesley hottot
    Location: Mercer Slough
  136. Common Redpoll Acanthis flammea
    # Count: 25
    Date:
    Observer: Jim Prager
    Location: Mercer Slough
  137. Short-eared Owl Asio flammeus
    # Count: 1
    Date:
    Observer: Sharon Cormier-Aagaard
    Location: Mercer Slough
  138. Black Swift Cypseloides niger
    # Count: 2
    Date:
    Observer: Sharon Cormier-Aagaard
    Location: Mercer Slough
  139. Red-breasted Merganser Mergus serrator
    # Count: 1
    Date:
    Observer: Davor Grgic
    Location: Mercer Slough
  140. Greater Scaup Aythya marila
    # Count: 1
    Date:
    Observer: Steve Morris
    Location: Mercer Slough
  141. Horned Grebe Podiceps auritus
    # Count: 1
    Date:
    Observer: Ryan O'Donnell
    Location: Mercer Slough
  142. Herring Gull Larus argentatus
    # Count: 1
    Date:
    Observer: Kaylin Ingalls
    Location: Mercer Slough
  143. California Quail Callipepla californica
    # Count: 1
    Date:
    Observer: Paul Barrus
    Location: Mercer Slough
  144. Trumpeter Swan Cygnus buccinator
    # Count: 3
    Date:
    Observer: Hugh Jennings
    Location: Mercer Slough
  145. Rough-legged Hawk Buteo lagopus
    # Count: 1
    Date:
    Observer: Claudia Burns
    Location: Mercer Slough
  146. Common Loon Gavia immer
    # Count: 1
    Date:
    Observer: Hugh Jennings
    Location: Mercer Slough
  147. Western Gull Larus occidentalis
    # Count: 1
    Date:
    Observer: Dan Bormann
    Location: Mercer Slough
  148. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: Dan Bormann
    Location: Mercer Slough
  149. American Dipper Cinclus mexicanus
    # Count: 1
    Date:
    Observer: Dan Bormann
    Location: Mercer Slough
  150. Canvasback Aythya valisineria
    # Count: X
    Date:
    Observer: Jim Elder
    Location: Mercer Slough

Exotic: Escapee (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: 1
    Date:
    Observer: Robert Thorn
    Location: Mercer Slough

Hybrids (1)

  1. Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescens
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough

Additional Taxa (42)

  1. passerine sp. Passeriformes sp.
    # Count: 1
    Date:
    Observer: Lyn Boorman
    Location: Mercer Slough
  2. duck sp. Anatidae (duck sp.)
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  3. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: james shannon
    Location: Mercer Slough
  4. new world sparrow sp. Passerellidae sp.
    # Count: 2
    Date:
    Observer: Grace Zhang
    Location: Mercer Slough
  5. wren sp. Troglodytidae sp.
    # Count: 1
    Date:
    Observer: Kamella Boullé
    Location: Mercer Slough
  6. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Kamella Boullé
    Location: Mercer Slough
  7. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    # Count: 1
    Date:
    Observer: Kamella Boullé
    Location: Mercer Slough
  8. hummingbird sp. Trochilidae sp.
    # Count: 4
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  9. gull sp. Larinae sp.
    # Count: 5
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  10. woodpecker sp. Picidae sp.
    # Count: 1
    Date:
    Observer: Carl Haynie
    Location: Mercer Slough
  11. bird sp. Aves sp.
    # Count: 2
    Date:
    Observer: Laurel Stitzhal
    Location: Mercer Slough
  12. chickadee sp. Poecile sp.
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  13. House/Purple Finch Haemorhous mexicanus/purpureus
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  14. blackbird sp. Icteridae sp.
    # Count: 3
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  15. new world warbler sp. Parulidae sp.
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  16. new world flycatcher sp. Tyrannidae sp.
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  17. swallow sp. Hirundinidae sp.
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  18. thrush sp. Turdidae sp.
    # Count: 1
    Date:
    Observer: Jake Shorty
    Location: Mercer Slough
  19. pigeon/dove sp. Columbidae sp.
    # Count: 2
    Date:
    Observer: peter carr
    Location: Mercer Slough
  20. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 2
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  21. Accipiter sp. Accipiter sp.
    # Count: 1
    Date:
    Observer: Kevin Waggoner
    Location: Mercer Slough
  22. Larus sp. Larus sp.
    # Count: 2
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  23. Western/Glaucous-winged Gull Larus occidentalis/glaucescens
    # Count: 3
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  24. Empidonax sp. Empidonax sp.
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  25. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    # Count: 1
    Date:
    Observer: Leah Lang
    Location: Mercer Slough
  26. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    # Count: 1
    Date:
    Observer: Molly Elizabeth
    Location: Mercer Slough
  27. Catharus sp. Catharus sp.
    # Count: 1
    Date:
    Observer: Eric Hope
    Location: Mercer Slough
  28. Rock/Band-tailed Pigeon Columba livia/Patagioenas fasciata
    # Count: 1
    Date:
    Observer: Neil Pankey
    Location: Mercer Slough
  29. finch sp. Fringillidae sp.
    # Count: 7
    Date:
    Observer: Heidi Erland
    Location: Mercer Slough
  30. Trumpeter/Tundra Swan Cygnus buccinator/columbianus
    # Count: 4
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  31. cormorant sp. Phalacrocoracidae sp.
    # Count: 1
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  32. goose sp. Anatidae (goose sp.)
    # Count: 120
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  33. Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperii
    # Count: 1
    Date:
    Observer: Emily Larson
    Location: Mercer Slough
  34. falcon sp. Falco sp.
    # Count: 1
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  35. Red-naped/Red-breasted Sapsucker Sphyrapicus nuchalis/ruber
    # Count: 1
    Date:
    Observer: Ben Stephens
    Location: Mercer Slough
  36. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 30
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  37. Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapa
    # Count: 1
    Date:
    Observer: Eric Crockett
    Location: Mercer Slough
  38. teal sp. Anatidae sp. (teal sp.)
    # Count: 3
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  39. tern sp. Sterninae sp.
    # Count: 1
    Date:
    Observer: Prof Brown
    Location: Mercer Slough
  40. sapsucker sp. Sphyrapicus sp.
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Mercer Slough
  41. Common/Barrow's Goldeneye Bucephala clangula/islandica
    # Count: 1
    Date:
    Observer: Bill Hubbard
    Location: Mercer Slough
  42. vireo sp. Vireo sp.
    # Count: 1
    Date:
    Observer: Mark Vernon
    Location: Mercer Slough