species
109.
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110.
species
113.
species
115.
species
121.
species
136.
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species
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623.
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664.
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669.
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691.
Mallard x American Black Duck (hybrid)
Western x Glaucous-winged Gull (hybrid)
Bufflehead x Common Goldeneye (hybrid)
Common x Barrow's Goldeneye (hybrid)
Great Black-backed x Glaucous Gull (hybrid)
Redhead x Lesser Scaup (hybrid)
Common Goldeneye x Hooded Merganser (hybrid)
Gadwall x Mallard (hybrid)
Tufted Duck x scaup sp. (hybrid)
Snow x Canada Goose (hybrid)
Herring x Glaucous-winged Gull (hybrid)
Ring-necked Duck x Lesser Scaup (hybrid)
Eurasian x American Wigeon (hybrid)
Herring x Lesser Black-backed Gull (hybrid)
Herring x Great Black-backed Gull (hybrid)
Mute x Trumpeter Swan (hybrid)
White-crowned x Golden-crowned Sparrow (hybrid)
Greater White-fronted x Canada Goose (hybrid)
American Wigeon x Mallard (hybrid)
Redhead x scaup sp. (hybrid)
Herring x Glaucous Gull (hybrid)
Red-shouldered x Red-tailed Hawk (hybrid)
Domestic goose sp. x Canada Goose (hybrid)
House x Eurasian Tree Sparrow (hybrid)
Mallard x Northern Pintail (hybrid)
Muscovy Duck x Mallard (hybrid)
Tufted Duck x Lesser Scaup (hybrid)
Greater White-fronted x Cackling Goose (hybrid)
Graylag x Canada Goose (hybrid)
Tufted Duck x Greater Scaup (hybrid)
Redhead x Ring-necked Duck (hybrid)
Cooper's Hawk x American Goshawk (hybrid)
Snow x Cackling Goose (hybrid)
Ring-necked Duck x scaup sp. (hybrid)
Dark-eyed Junco x White-throated Sparrow (hybrid)
Glaucous x Glaucous-winged Gull (hybrid)
Canvasback x Redhead (hybrid)
Graylag x Swan Goose (hybrid)
Snow x Ross's Goose (hybrid)
Barnacle x Cackling Goose (hybrid)
Gadwall x American Wigeon (hybrid)
Snow x Greater White-fronted Goose (hybrid)
Western x Clark's Grebe (hybrid)
goldeneye sp. x Hooded Merganser (hybrid)
Spotted x Eastern Towhee (hybrid)
Black-capped x Mountain Chickadee (hybrid)
White-crowned x White-throated Sparrow (hybrid)
Song x Swamp Sparrow (hybrid)
Steller's Jay x California Scrub-Jay (hybrid)
Golden-crowned x White-throated Sparrow (hybrid)
Red-naped x Red-breasted Sapsucker (hybrid)
American Redstart x Magnolia Warbler (hybrid)
Brewster's Warbler (hybrid)
Lawrence's Warbler (hybrid)
Golden-winged x Blue-winged Warbler (hybrid)
Rose-breasted x Black-headed Grosbeak (hybrid)
Yellow-bellied x Red-breasted Sapsucker (hybrid)
Yellow-bellied x Red-naped Sapsucker (hybrid)
Eastern x Mountain Bluebird (hybrid)
Lazuli x Indigo Bunting (hybrid)
Thick-billed x Common Murre (hybrid)
Common x Roseate Tern (hybrid)
Oriental Turtle-Dove x Eurasian Collared-Dove (hybrid)
Mourning Warbler x Common Yellowthroat (hybrid)
Blue-winged x Cinnamon Teal (hybrid)
Cinnamon Teal x Northern Shoveler (hybrid)
Chipping x Clay-colored Sparrow (hybrid)
Ruddy Turnstone x White-rumped Sandpiper (hybrid)
Glossy x White-faced Ibis (hybrid)
Bay-breasted x Blackburnian Warbler (hybrid)
Greater Sage-Grouse x Sharp-tailed Grouse (hybrid)
Black-necked Stilt x American Avocet (hybrid)
Blue-winged x Green-winged Teal (hybrid)
Calliope x Rufous Hummingbird (hybrid)
King x Common Eider (hybrid)
American Wigeon x Green-winged Teal (hybrid)
Blue-winged Teal x Northern Shoveler (hybrid)
Barnacle x Canada Goose (hybrid)
Surf x White-winged Scoter (hybrid)
Bufflehead x Hooded Merganser (hybrid)
Anna's x Rufous Hummingbird (hybrid)
Ring-necked Duck x Greater Scaup (hybrid)
Red-tailed x Rough-legged Hawk (hybrid)
Canvasback x Ring-necked Duck (hybrid)
Swan Goose x Canada Goose (hybrid)
Western x Eastern Kingbird (hybrid)
Bullock's x Baltimore Oriole (hybrid)
Tennessee x Nashville Warbler (hybrid)
Black-throated Gray x Townsend's Warbler (hybrid)
Townsend's x Hermit Warbler (hybrid)
MacGillivray's x Mourning Warbler (hybrid)
Townsend's x Black-throated Green Warbler (hybrid)
Cinnamon x Green-winged Teal (hybrid)
Northern Pintail x Green-winged Teal (hybrid)
Ross's x Cackling Goose (hybrid)
Gadwall x Northern Pintail (hybrid)
Wood Duck x Mallard (hybrid)
Lapland Longspur x Snow Bunting (hybrid)
Redhead x Greater Scaup (hybrid)
Barrow's Goldeneye x Hooded Merganser (hybrid)
Snow/Ross's x Cackling/Canada Goose (hybrid)
Clay-colored x Field Sparrow (hybrid)
Barn x Cliff Swallow (hybrid)
Western x Eastern Meadowlark (hybrid)
Northern Shoveler x Gadwall (hybrid)
American Wigeon x Northern Pintail (hybrid)
Song x Lincoln's Sparrow (hybrid)
Steller's x Blue Jay (hybrid)
Black-chinned x Anna's Hummingbird (hybrid)
Black-chinned x Rufous Hummingbird (hybrid)
Dunlin x White-rumped Sandpiper (hybrid)
Chipping x Field Sparrow (hybrid)
Pine Siskin x American Goldfinch (hybrid)
Ring-necked x Green Pheasant (hybrid)
Bufflehead x goldeneye sp. (hybrid)
Northern Shoveler x Mallard (hybrid)
Wood Duck x Hooded Merganser (hybrid)
Ring-necked x Tufted Duck (hybrid)
Carolina x Black-capped Chickadee (hybrid)
Black-headed x Ring-billed Gull (hybrid)
Orange-crowned x Nashville Warbler (hybrid)
Warbling x Red-eyed Vireo (hybrid)
Magnolia x Chestnut-sided Warbler (hybrid)
Magnolia x Yellow-rumped Warbler (hybrid)
Nashville x Magnolia Warbler (hybrid)
Magnolia x Black-throated Blue Warbler (hybrid)
Glaucous-winged x Slaty-backed Gull (hybrid)
Herring x California Gull (hybrid)
Canvasback x scaup sp. (hybrid)
Buff-breasted x White-rumped Sandpiper (hybrid)
Sandhill x Common Crane (hybrid)
Violet-green x Cliff Swallow (hybrid)
White-rumped x Pectoral Sandpiper (hybrid)
Palm x Yellow-rumped Warbler (hybrid)
Wood x Mandarin Duck (hybrid)
Common x Hoary Redpoll (hybrid)
Laughing x Ring-billed Gull (hybrid)
Sharp-tailed Grouse x Greater Prairie-Chicken (hybrid)
Gadwall x Green-winged Teal (hybrid)
Cackling/Canada Goose
blackbird sp.
Common/Red-breasted Merganser
large alcid sp.
shorebird sp.
Trumpeter/Tundra Swan
dabbling duck sp.
passerine sp.
Common/Barrow's Goldeneye
Common/Hoary Redpoll
Great/Double-crested Cormorant
Mallard/American Black Duck
Tree/Violet-green Swallow
American Three-toed/Black-backed Woodpecker
Sharp-shinned/Cooper's Hawk
large falcon sp.
Domestic goose sp. (Domestic type)
Bohemian/Cedar Waxwing
small falcon sp.
diurnal raptor sp.
Snow/Ross's Goose
Western/Glaucous-winged Gull
Ruby-crowned/Golden-crowned Kinglet
Western/Eastern Meadowlark
Cooper's Hawk/American Goshawk
sapsucker sp.
Calidris sp.
Horned/Eared Grebe
new world warbler sp.
Short-billed/Long-billed Dowitcher
American/Fish Crow
Spizella sp./American Tree Sparrow
crossbill sp.
Parasitic/Pomarine Jaeger
Zonotrichia sp.
Bronzed/Brown-headed Cowbird
Black-capped/Mountain Chickadee
Long-eared/Short-eared Owl
Branta sp.
ptarmigan sp.
Thick-billed/Common Murre
Varied Thrush/American Robin
Herring/Iceland Gull
Yellow-bellied/Red-naped Sapsucker
White-crowned/White-throated Sparrow
Rusty/Brewer's Blackbird
Buteo/eagle sp.
Common/Yellow-billed Loon
Loggerhead/Northern Shrike
shearwater sp.
King/Common Eider
Sooty/Short-tailed Shearwater
Lesser/Greater Yellowlegs
procellariid sp.
Western/Semipalmated Sandpiper
Sturnella meadowlark sp.
Tyrannus sp.
Myiarchus sp.
Eurasian/African Collared-Dove
Cliff/Cave Swallow
Red/Red-necked Phalarope
jaeger/skua sp.
new world flycatcher sp.
yellow-bellied kingbird sp.
Forster's/Common Tern
Western/Eastern Wood-Pewee
Black-bellied Plover/golden-plover sp.
American/Pacific Golden-Plover (Lesser Golden-Plover)
Western/Eastern Cattle Egret
Common/Short-billed Gull
Empidonax sp.
phalarope sp.
Common/Arctic Tern
Long-tailed/Parasitic Jaeger
Setophaga sp.
Herring/Glaucous-winged Gull
white egret sp.
Leiothlypis sp.
Spizella sp.
Blue-winged/Cinnamon Teal
Yellow-billed/Black-billed Cuckoo
storm-petrel sp.
Bay-breasted/Blackpoll Warbler
storm-petrel sp. (white-rumped)
Ruby-throated/Black-chinned Hummingbird
Podiceps sp.
large shorebird sp.
Alder/Willow Flycatcher (Traill's Flycatcher)
rail/crake sp.
Philadelphia/Warbling Vireo
Gray-cheeked/Bicknell's Thrush
Philadelphia/Red-eyed Vireo
Red-shouldered/Broad-winged Hawk
Pheucticus sp.
Yellow-crowned/Black-crowned Night Heron
Glossy/White-faced Ibis
pygmy-owl/saw-whet owl sp.
nightjar sp.
Pallas's/Reed Bunting
Black-throated Gray/Townsend's Warbler
tanager sp. (Piranga sp.)
Golden-winged/Blue-winged Warbler
Cathartes sp.
new world oriole sp.
Oceanites sp.
MacGillivray's/Mourning Warbler
Double-crested/Neotropic Cormorant
Hammond's/Dusky Flycatcher
Connecticut/MacGillivray's/Mourning Warbler
Spotted/Eastern Towhee (Rufous-sided Towhee)
Rose-breasted/Black-headed Grosbeak
small plover sp.
Procellaria sp.
nighthawk sp.
lovebird sp.
Cassin's/Blue-headed Vireo
Selasphorus sp.
Louisiana/Northern Waterthrush
Bullock's/Baltimore Oriole
Common Ringed/Semipalmated Plover
Streptopelia sp.
black-and-white shearwater sp.
albatross sp.
Red-naped/Red-breasted Sapsucker
Hen/Northern Harrier
King/Virginia Rail
moorhen/coot/gallinule sp.
Carolina/Black-capped Chickadee
Passer sp.
pewee sp. (Contopus sp.)
solitary vireo sp.
Herring/Lesser Black-backed Gull
new world vulture sp.
Pacific/Winter Wren
Ring-necked/Green Pheasant
Rufous/Allen's Hummingbird
Passerina sp.
Coccyzus sp.
cuckoo sp. (Cuculidae sp.)
Taiga/Tundra Bean-Goose
Ammospiza sp.
small swift sp.
Cory's/Great Shearwater
LeConte's/Nelson's Sparrow
Sedge/Marsh Wren
Chlidonias sp.
parrot sp.
Summer/Scarlet Tanager
Lazuli/Indigo Bunting
Haliaeetus/Icthyophaga sp.
Antrostomus sp.
Townsend's/Hermit Warbler
sparrow/warbler sp. (trilling song)
Cassin's/Plumbeous Vireo
Eastern/Chihuahuan Meadowlark
Tree/Olive-backed Pipit
vireo sp. (Red-eyed Vireo complex)
Haemorhous sp.
golden-plover sp.
large tern sp.
whistling-duck sp.
Long-tailed/Pomarine Jaeger
new world quail sp.
kingfisher sp.
old world quail sp.
Velvet/White-winged/Stejneger's Scoter
Caprimulgus sp.
Great/Medium Egret
Phylloscopus sp.
Yellow-browed/Hume's Warbler
Striated/Green Heron
White-winged/Stejneger's Scoter
Mallard/Mexican Duck
large rail sp.
Tropical/Couch's Kingbird
Common/Rain Quail
Laughing/Franklin's Gull
Red-eyed/Yellow-green Vireo
Sooty/Bridled Tern
Common/Spotted Sandpiper
Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow)
Scripps's/Guadalupe Murrelet (Xantus's Murrelet)
small bittern sp.
House/Eurasian Tree Sparrow
Chimney/Vaux's Swift
Yellow-legged/Lesser Black-backed Gull
new world goldfinch sp.
Arctic/Pacific Loon
Dryobates sp.
Grasshopper/Henslow's Sparrow
Brown/Long-billed Thrasher
Purple/Rock Sandpiper
new world martin sp. (Progne sp.)
frigatebird sp.
Western/Chihuahuan Meadowlark
Snow/McKay's Bunting
Sharp-tailed/Pectoral Sandpiper
Tachycineta sp.
Pterodroma sp.
Common/Wilson's Snipe
Bullock's/Black-backed Oriole
King/Clapper Rail
Hydrobates sp.
Serinus sp.
Chaetura sp.
Northern Cardinal/Pyrrhuloxia
violetear sp.
Eastern/Mexican Whip-poor-will
parakeet sp.
large albatross sp.
Boat-tailed/Great-tailed Grackle
Red/Black Kite
Cassin's/Western Kingbird
Boreal/Northern Saw-whet Owl
Siberian/Amur Stonechat
flamingo sp.
Eurasian/American Goshawk
Whimbrel/Eurasian Curlew