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Western x Glaucous-winged Gull (hybrid)
Herring x Glaucous-winged Gull (hybrid)
Herring x Glaucous Gull (hybrid)
Glaucous x Glaucous-winged Gull (hybrid)
Graylag x Swan Goose (hybrid)
Muscovy Duck x Mallard (hybrid)
Townsend's x Hermit Warbler (hybrid)
Western x Clark's Grebe (hybrid)
Yellow-rumped x Townsend's Warbler (hybrid)
Common x Barrow's Goldeneye (hybrid)
Snow x Ross's Goose (hybrid)
Red-naped x Red-breasted Sapsucker (hybrid)
White-crowned x White-throated Sparrow (hybrid)
Anna's Hummingbird x Selasphorus sp. (hybrid)
Anna's x Costa's Hummingbird (hybrid)
Eurasian x American Wigeon (hybrid)
American Redstart x Yellow Warbler (hybrid)
Bullock's x Baltimore Oriole (hybrid)
Golden-winged x Blue-winged Warbler (hybrid)
Philadelphia x Red-eyed Vireo (hybrid)
Rose-breasted x Black-headed Grosbeak (hybrid)
passerine sp.
hummingbird sp.
Setophaga sp.
Rufous/Allen's Hummingbird
Tree/Violet-green Swallow
Short-billed/Long-billed Dowitcher
new world warbler sp.
shorebird sp.
diurnal raptor sp.
Sharp-shinned/Cooper's Hawk
Selasphorus sp.
Pacific/Winter Wren
new world oriole sp.
rail/crake sp.
sapsucker sp.
tanager sp. (Piranga sp.)
large parakeet sp. (former Aratinga sp.)
murrelet sp.
Accipiter sp.
Mitred/Red-masked Parakeet
Psittacara sp.
waterfowl sp.
Common/Barrow's Goldeneye
Red/Red-necked Phalarope
Sooty/Short-tailed Shearwater
Masked/Nazca Booby
bluebird sp.
large shorebird sp.
Herring/Iceland Gull
Parasitic/Pomarine Jaeger
Catharus sp.
Calidris sp.
shearwater sp.
Common/Red-breasted Merganser
Cackling/Canada Goose
storm-petrel sp.
American/Pacific Golden-Plover (Lesser Golden-Plover)
Hydrobates sp.
Spizella sp.
Rose-breasted/Black-headed Grosbeak
longspur sp.
Acanthis/Spinus sp.
Cassin's/Blue-headed Vireo
Long-tailed/Parasitic Jaeger
Red-winged/Tricolored Blackbird
Orchard/Hooded Oriole
Scripps's/Guadalupe Murrelet (Xantus's Murrelet)
Scripps's/Guadalupe/Craveri's Murrelet
yellow-bellied kingbird sp.
Lazuli/Indigo Bunting
white egret sp.
Alder/Willow Flycatcher (Traill's Flycatcher)
Pheucticus sp.
pewee sp. (Contopus sp.)
solitary vireo sp.
Snow/Ross's Goose
Golden/Bald Eagle
Lesser/Greater Yellowlegs
Eurasian/American Wigeon
new world flycatcher sp.
large tern sp.
dabbling duck sp.
Myiarchus sp.
Tropical/Couch's Kingbird
Tyrannus sp.
Pterodroma sp.
albatross sp.
procellariid sp.
merganser sp.
Blue-winged/Cinnamon Teal
nuthatch sp.
pipit sp.
Passerina sp.
storm-petrel sp. (dark-rumped)
Chimney/Vaux's Swift
large rail sp.
Black-throated Gray/Townsend's/Hermit Warbler
storm-petrel sp. (white-rumped)
Western/Eastern Wood-Pewee
large swift sp.
Domestic goose sp. (Domestic type)
Townsend's/Hermit Warbler
Laughing/Franklin's Gull
Glossy/White-faced Ibis
old world quail sp.
black-and-white shearwater sp.
Black-throated Gray/Townsend's Warbler
nighthawk sp.
Hammond's/Dusky Flycatcher
large alcid sp.
jaeger/skua sp.
Yellow-bellied/Red-naped Sapsucker
Western/Glaucous-winged Gull
Streptopelia sp.
gull/tern sp.
pheasant sp.
Bullock's/Baltimore Oriole
Leach's/Townsend's Storm-Petrel (white-rumped)
Elegant/Royal Tern
small falcon sp.
parakeet sp.
Arctic/Kamchatka Leaf Warbler
Sagebrush/Bell's Sparrow (Sage Sparrow)
parrot sp.
Black-bellied Plover/golden-plover sp.
Common/Yellow-billed Loon
large falcon sp.
Connecticut/MacGillivray's/Mourning Warbler