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Red-naped x Red-breasted Sapsucker (hybrid)
Townsend's x Hermit Warbler (hybrid)
Western x Clark's Grebe (hybrid)
Eurasian x American Wigeon (hybrid)
White-crowned x Golden-crowned Sparrow (hybrid)
Gadwall x Mallard (hybrid)
Anna's x Costa's Hummingbird (hybrid)
Herring x Glaucous-winged Gull (hybrid)
Yellow-bellied x Red-breasted Sapsucker (hybrid)
Downy x Nuttall's Woodpecker (hybrid)
MacGillivray's Warbler x Common Yellowthroat (hybrid)
Glaucous x Glaucous-winged Gull (hybrid)
Mallard x Northern Pintail (hybrid)
Herring x Glaucous Gull (hybrid)
Western x Glaucous-winged Gull (hybrid)
Blue-winged x Cinnamon Teal (hybrid)
Common/Barrow's Goldeneye
wren sp.
Sharp-tailed/Pectoral Sandpiper
Red-naped/Red-breasted Sapsucker
Orchard/Hooded Oriole
Passerina sp.
Cassin's/Blue-headed Vireo
Psittacara sp.
yellow-bellied kingbird sp.
Leach's/Townsend's Storm-Petrel (white-rumped)
nuthatch sp.
storm-petrel sp. (white-rumped)
new world warbler sp.
Ruby-crowned/Golden-crowned Kinglet
Hammond's/Dusky Flycatcher
pigeon/dove sp.
Rose-breasted/Black-headed Grosbeak
owl sp.
Yellow-bellied/Red-naped Sapsucker
Podiceps sp.
Lesser/Greater Yellowlegs
pewee sp. (Contopus sp.)
Philadelphia/Warbling Vireo
Parasitic/Pomarine Jaeger
parrot sp.
Red/Red-necked Phalarope
Western/Semipalmated Sandpiper
small plover sp.
Domestic goose sp. (Domestic type)
shorebird sp.
Spizella sp.
Sharp-shinned/Cooper's Hawk
Long-tailed/Parasitic Jaeger
Psittacula sp.
parakeet sp.
Setophaga sp.
Forster's/Common Tern
passerine sp.
Townsend's/Hermit Warbler
hummingbird sp.
tanager sp. (Piranga sp.)
new world sparrow sp.
Phylloscopus sp.
vireo sp. (Red-eyed Vireo complex)
Dryobates sp.
murrelet sp.
nightjar sp.
Black-throated Gray/Hermit Warbler
shearwater sp.
white egret sp.
waterfowl sp.
Red-winged/Tricolored Blackbird
Chimney/Vaux's Swift
Snow/Ross's Goose
Ruby-throated/Black-chinned Hummingbird
Bullock's/Baltimore Oriole
Black-throated Gray/Townsend's Warbler
Elegant/Royal Tern
black-and-white shearwater sp.
Black-bellied Plover/golden-plover sp.
Common/Red-breasted Merganser
diurnal raptor sp.
Accipiter sp.
yellowthroat sp.
Western/Glaucous-winged Gull
longspur sp.
large shorebird sp.
blackbird sp.
Rufous/Allen's Hummingbird
White-winged/Stejneger's Scoter
House/Purple Finch
Sooty/Short-tailed Shearwater
cormorant sp.
Lazuli/Indigo Bunting
Catharus sp.
dabbling duck sp.
solitary vireo sp.
Short-billed/Long-billed Dowitcher
new world goldfinch sp.
Blue-winged/Cinnamon Teal
Greater/Lesser Scaup
phalarope sp.
Thalasseus sp.
Tree/Violet-green Swallow
Myiarchus sp.
American/Pacific Golden-Plover (Lesser Golden-Plover)
Anna's/Costa's Hummingbird
Scripps's/Craveri's Murrelet
Cookilaria petrel sp.
Common/Arctic Tern
Scripps's/Guadalupe Murrelet (Xantus's Murrelet)
Scripps's/Guadalupe/Craveri's Murrelet