Taxonomic
- Whistling Ducks
- Black-bellied Whistling-Duck
- Fulvous Whistling-Duck
- Geese
- Pink-footed Goose
- Greater White-fronted Goose
- Snow Goose
- Ross's Goose
- Brant
- Barnacle Goose
- Barnacle X Cackling Goose
- Cackling Goose
- Canada Goose
- Swans
- Mute Swan
- Trumpeter Swan
- Tundra Swan
- Ducks
- Wood Duck
- Gadwall
- Eurasian Wigeon
- American Wigeon
- American Black Duck
- Mallard
- Mallard (Typical)
- Mexican Duck
- Mottled Duck
- Blue-winged Teal
- Cinnamon Teal
- Northern Shoveler
- Northern Pintail
- Green-winged Teal
- Canvasback
- Redhead
- Ring-necked Duck
- Tufted Duck
- Greater Scaup
- Lesser Scaup
- Steller's Eider
- Spectacled Eider
- King Eider
- Common Eider
- Harlequin Duck
- Surf Scoter
- White-winged Scoter
- Black Scoter
- Long-tailed Duck
- Bufflehead
- Common Goldeneye
- Barrow's Goldeneye
- Hooded Merganser
- Common Merganser
- Red-breasted Merganser
- Ruddy Duck
- Gallinaceous Birds
- Plain Chachalaca
- Scaled Quail
- California Quail
- Gambel's Quail
- Northern Bobwhite
- Ring-necked Pheasant
- Greater Sage-Grouse
- Gunnison Sage-Grouse
- Spruce Grouse
- Willow Ptarmigan
- Rock Ptarmigan
- White-tailed Ptarmigan
- Sooty Grouse
- Dusky Grouse
- Sharp-tailed Grouse
- Greater Prairie-Chicken
- Lesser Prairie-Chicken
- Wild Turkey
- Loons
- Red-throated Loon
- Pacific Loon
- Common Loon
- Grebes
- Least Grebe
- Pied-billed Grebe
- Horned Grebe
- Red-necked Grebe
- Eared Grebe
- Western Grebe
- Clark's Grebe
- Tubenoses
- Laysan Albatross
- Black-footed Albatross
- Northern Fulmar
- Black-capped Petrel
- Cory's Shearwater
- Sooty Shearwater
- Great Shearwater
- Pink-footed Shearwater
- Manx Shearwater
- Audubon's Shearwater
- Wilson's Storm-Petrel
- Band-rumped Storm-Petrel
- Storks
- Wood Stork
- Frigatebirds
- Magnificent Frigatebird
- Gannets and Boobies
- Northern Gannet
- Cormorants
- Brandt's Cormorant
- Neotropic Cormorant
- Double-crested Cormorant
- Red-faced Cormorant
- Pelagic Cormorant
- Anhinga
- Pelicans
- American White Pelican
- Brown Pelican
- Herons and Egrets
- American Bittern
- Least Bittern
- Great Blue Heron
- Great Egret
- Snowy Egret
- Little Blue Heron
- Tricolored Heron
- Reddish Egret
- Cattle Egret
- Green Heron
- Black-crowned Night-Heron
- Yellow-crowned Night-Heron
- White Ibis
- Glossy Ibis
- White-faced Ibis
- Roseate Spoonbill
- Vultures
- Black Vulture
- Turkey Vulture
- Diurnal Raptors
- Osprey
- Swallow-tailed Kite
- White-tailed Kite
- Snail Kite
- Mississippi Kite
- Bald Eagle
- Northern Harrier
- Sharp-shinned Hawk
- Cooper's Hawk
- Northern Goshawk
- Common Black Hawk
- Harris's Hawk
- Gray Hawk
- Red-shouldered Hawk
- Broad-winged Hawk
- Swainson's Hawk
- Red-tailed Hawk
- Rough-legged Hawk
- Ferruginous Hawk
- Golden Eagle
- Rails
- Ridgway's Rail
- Clapper Rail
- King Rail
- Virginia Rail
- Sora
- Purple Swamphen
- Purple Gallinule
- Common Gallinule
- American Coot
- Limpkin
- Limpkin
- Cranes
- Sandhill Crane
- Whooping Crane
- Shorebirds: Plovers
- Black-bellied Plover
- American Golden-Plover
- Pacific Golden-Plover
- Snowy Plover
- Wilson's Plover
- Semipalmated Plover
- Piping Plover
- Killdeer
- Mountain Plover
- Shorebirds: Other
- American Oystercatcher
- Black Oystercatcher
- Black-necked Stilt
- American Avocet
- Shorebirds: Sandpipers
- Spotted Sandpiper
- Solitary Sandpiper
- Gray-tailed Tattler
- Wandering Tattler
- Greater Yellowlegs
- Willet
- Lesser Yellowlegs
- Upland Sandpiper
- Bristle-thighed Curlew
- Whimbrel
- Long-billed Curlew
- Bar-tailed Godwit
- Hudsonian Godwit
- Marbled Godwit
- Ruddy Turnstone
- Black Turnstone
- Surfbird
- Red Knot
- Sanderling
- Semipalmated Sandpiper
- Western Sandpiper
- Red-necked Stint
- Least Sandpiper
- White-rumped Sandpiper
- Baird's Sandpiper
- Pectoral Sandpiper
- Purple Sandpiper
- Rock Sandpiper
- Dunlin
- Stilt Sandpiper
- Buff-breasted Sandpiper
- Short-billed Dowitcher
- Long-billed Dowitcher
- Wilson's Snipe
- American Woodcock
- Wilson's Phalarope
- Red-necked Phalarope
- Red Phalarope
- Gulls
- Black-legged Kittiwake
- Red-legged Kittiwake
- Ivory Gull
- Sabine's Gull
- Bonaparte's Gull
- Black-headed Gull
- Laughing Gull
- Franklin's Gull
- Heermann's Gull
- Mew Gull
- Ring-billed Gull
- California Gull
- Western Gull
- Herring Gull
- Iceland Gull
- Lesser Black-backed Gull
- Glaucous-winged Gull
- Glaucous-winged X Western Gull
- Glaucous Gull
- Great Black-backed Gull
- Terns
- Sooty Tern
- Bridled Tern
- Aleutian Tern
- Least Tern
- Caspian Tern
- Black Tern
- Common Tern
- Arctic Tern
- Forster's Tern
- Royal Tern
- Sandwich Tern
- Elegant Tern
- Skimmers
- Black Skimmer
- Skuas and Jaegers
- Pomarine Jaeger
- Parasitic Jaeger
- Long-tailed Jaeger
- Alcids
- Common Murre
- Thick-billed Murre
- Razorbill
- Black Guillemot
- Pigeon Guillemot
- Marbled Murrelet
- Parakeet Auklet
- Least Auklet
- Crested Auklet
- Rhinoceros Auklet
- Atlantic Puffin
- Horned Puffin
- Tufted Puffin
- Pigeons and Doves
- Rock Pigeon
- White-crowned Pigeon
- Band-tailed Pigeon
- Eurasian Collared-Dove
- White-winged Dove
- Mourning Dove
- Inca Dove
- Common Ground-Dove
- White-tipped Dove
- Cuckoos
- Yellow-billed Cuckoo
- Greater Roadrunner
- Owls
- Barn Owl
- Flammulated Owl
- Western Screech-Owl
- Eastern Screech-Owl
- Whiskered Screech-Owl
- Great Horned Owl
- Snowy Owl
- Northern Pygmy-Owl
- Elf Owl
- Northern Hawk Owl
- Burrowing Owl
- Spotted Owl
- Barred Owl
- Great Gray Owl
- Long-eared Owl
- Short-eared Owl
- Boreal Owl
- Northern Saw-whet Owl
- Nightjars
- Common Nighthawk
- Common Pauraque
- Common Poorwill
- Chuck-will's-widow
- Buff-collared Nightjar
- Eastern Whip-poor-will
- Mexican Whip-poor-will
- Swifts
- Black Swift
- Hummingbirds
- Broad-billed Hummingbird
- Buff-bellied Hummingbird
- Blue-throated Hummingbird
- Rivoli's Hummingbird
- Lucifer Hummingbird
- Ruby-throated Hummingbird
- Black-chinned Hummingbird
- Anna's Hummingbird
- Costa's Hummingbird
- Broad-tailed Hummingbird
- Rufous Hummingbird
- Allen's Hummingbird
- Calliope Hummingbird
- Trogons
- Elegant Trogon
- Kingfishers
- Belted Kingfisher
- Green Kingfisher
- Woodpeckers
- Lewis's Woodpecker
- Red-headed Woodpecker
- Acorn Woodpecker
- Gila Woodpecker
- Golden-fronted Woodpecker
- Red-bellied Woodpecker
- Williamson's Sapsucker
- Yellow-bellied Sapsucker
- Red-naped Sapsucker
- Red-breasted Sapsucker
- Red-breasted X Red-naped Sapsucker
- Ladder-backed Woodpecker
- Nuttall's Woodpecker
- Downy Woodpecker
- Hairy Woodpecker
- Arizona Woodpecker
- Red-cockaded Woodpecker
- White-headed Woodpecker
- American Three-toed Woodpecker
- Black-backed Woodpecker
- Northern Flicker
- Gilded Flicker
- Pileated Woodpecker
- Falcons
- Crested Caracara
- American Kestrel
- Merlin
- Gyrfalcon
- Peregrine Falcon
- Parrots
- White-winged Parakeet
- Rosy-faced Lovebird
- Flycatchers
- Rose-throated Becard
- Northern Beardless-Tyrannulet
- Olive-sided Flycatcher
- Greater Pewee
- Western Wood-Pewee
- Eastern Wood-Pewee
- Yellow-bellied Flycatcher
- Acadian Flycatcher
- Alder Flycatcher
- Willow Flycatcher
- Least Flycatcher
- Hammond's Flycatcher
- Gray Flycatcher
- Dusky Flycatcher
- Pacific-slope Flycatcher
- Cordilleran Flycatcher
- Buff-breasted Flycatcher
- Black Phoebe
- Eastern Phoebe
- Say's Phoebe
- Vermilion Flycatcher
- Dusky-capped Flycatcher
- Ash-throated Flycatcher
- Great Crested Flycatcher
- Brown-crested Flycatcher
- Great Kiskadee
- Sulphur-bellied Flycatcher
- Tropical Kingbird
- Cassin's Kingbird
- Western Kingbird
- Eastern Kingbird
- Gray Kingbird
- Scissor-tailed Flycatcher
- Shrikes
- Loggerhead Shrike
- Vireos
- White-eyed Vireo
- Bell's Vireo
- Black-capped Vireo
- Gray Vireo
- Yellow-throated Vireo
- Cassin's Vireo
- Plumbeous Vireo
- Blue-headed Vireo
- Hutton's Vireo
- Warbling Vireo
- Philadelphia Vireo
- Red-eyed Vireo
- Black-whiskered Vireo
- Corvids
- Gray Jay
- Brown Jay
- Green Jay
- Pinyon Jay
- Steller's Jay
- Blue Jay
- Florida Scrub-Jay
- Island Scrub-Jay
- California Scrub-Jay
- Woodhouse's Scrub-Jay
- Mexican Jay
- Clark's Nutcracker
- Black-billed Magpie
- Yellow-billed Magpie
- American Crow
- Northwestern Crow
- Fish Crow
- Chihuahuan Raven
- Common Raven
- Larks
- Horned Lark
- Swallows
- Bank Swallow
- Purple Martin
- Tree Swallow
- Violet-green Swallow
- Northern Rough-winged Swallow
- Cliff Swallow
- Cave Swallow
- Barn Swallow
- Chickadees, Titmice, and Allies
- Carolina Chickadee
- Black-capped Chickadee
- Mountain Chickadee
- Mexican Chickadee
- Chestnut-backed Chickadee
- Boreal Chickadee
- Bridled Titmouse
- Oak Titmouse
- Juniper Titmouse
- Tufted Titmouse
- Black-crested Titmouse
- Verdin
- Bushtit
- Nuthatches and Treecreepers
- Red-breasted Nuthatch
- White-breasted Nuthatch
- Pygmy Nuthatch
- Brown-headed Nuthatch
- Brown Creeper
- Wrens
- Rock Wren
- Canyon Wren
- House Wren
- Pacific Wren
- Winter Wren
- Sedge Wren
- Marsh Wren
- Carolina Wren
- Bewick's Wren
- Cactus Wren
- Sinaloa Wren
- Gnatcatchers
- Blue-gray Gnatcatcher
- California Gnatcatcher
- Black-tailed Gnatcatcher
- Dippers
- American Dipper
- Kinglets and Allies
- Golden-crowned Kinglet
- Ruby-crowned Kinglet
- Arctic Warbler
- Wrentit
- Old World Flycatchers
- Bluethroat
- Northern Wheatear
- Thrushes
- Eastern Bluebird
- Western Bluebird
- Mountain Bluebird
- Townsend's Solitaire
- Veery
- Gray-cheeked Thrush
- Bicknell's Thrush
- Swainson's Thrush
- Hermit Thrush
- Wood Thrush
- Clay-colored Thrush
- Rufous-backed Robin
- American Robin
- Varied Thrush
- Mimids
- Gray Catbird
- Curve-billed Thrasher
- Brown Thrasher
- Long-billed Thrasher
- Bendire's Thrasher
- California Thrasher
- Le Conte's Thrasher
- Crissal Thrasher
- Sage Thrasher
- Northern Mockingbird
- Starlings
- European Starling
- Pipits
- Eastern Yellow Wagtail
- White Wagtail
- American Pipit
- Sprague's Pipit
- Silky Flycatchers
- Bohemian Waxwing
- Cedar Waxwing
- Phainopepla
- Olive Warbler
- Olive Warbler
- Longspurs and Buntings
- Lapland Longspur
- Chestnut-collared Longspur
- McCown's Longspur
- Snow Bunting
- Wood Warblers
- Ovenbird
- Worm-eating Warbler
- Louisiana Waterthrush
- Northern Waterthrush
- Golden-winged Warbler
- Lawrence's Warbler (Golden-winged X Blue-winged, recessive)
- Brewster's Warbler (Golden-winged X Blue-winged, dominant)
- Blue-winged Warbler
- Black-and-white Warbler
- Prothonotary Warbler
- Swainson's Warbler
- Tennessee Warbler
- Orange-crowned Warbler
- Lucy's Warbler
- Nashville Warbler
- Virginia's Warbler
- Connecticut Warbler
- MacGillivray's Warbler
- Mourning Warbler
- Kentucky Warbler
- Common Yellowthroat
- Hooded Warbler
- American Redstart
- Kirtland's Warbler
- Cape May Warbler
- Cerulean Warbler
- Northern Parula
- Tropical Parula
- Magnolia Warbler
- Bay-breasted Warbler
- Blackburnian Warbler
- Yellow Warbler
- Chestnut-sided Warbler
- Blackpoll Warbler
- Black-throated Blue Warbler
- Palm Warbler
- Pine Warbler
- Yellow-rumped Warbler
- Audubon's Warbler
- Myrtle Warbler
- Yellow-throated Warbler
- Prairie Warbler
- Grace's Warbler
- Black-throated Gray Warbler
- Townsend's Warbler
- Hermit Warbler
- Golden-cheeked Warbler
- Black-throated Green Warbler
- Canada Warbler
- Wilson's Warbler
- Red-faced Warbler
- Painted Redstart
- Yellow-breasted Chat
- Sparrows
- Olive Sparrow
- Green-tailed Towhee
- Spotted Towhee
- Eastern Towhee
- Rufous-crowned Sparrow
- Canyon Towhee
- California Towhee
- Abert's Towhee
- Rufous-winged Sparrow
- Botteri's Sparrow
- Cassin's Sparrow
- Bachman's Sparrow
- American Tree Sparrow
- Chipping Sparrow
- Clay-colored Sparrow
- Brewer's Sparrow
- Field Sparrow
- Black-chinned Sparrow
- Vesper Sparrow
- Lark Sparrow
- Five-striped Sparrow
- Black-throated Sparrow
- Sagebrush Sparrow
- Bell's Sparrow
- Lark Bunting
- Savannah Sparrow
- Grasshopper Sparrow
- Baird's Sparrow
- Henslow's Sparrow
- Le Conte's Sparrow
- Nelson's Sparrow
- Saltmarsh Sparrow
- Seaside Sparrow
- Fox Sparrow
- Song Sparrow
- Lincoln's Sparrow
- Swamp Sparrow
- White-throated Sparrow
- Harris's Sparrow
- White-crowned Sparrow
- Golden-crowned Sparrow
- Dark-eyed Junco
- Gray-headed Junco
- Oregon Junco
- Pink-sided Junco
- Red-backed Junco
- Slate-colored Junco
- Yellow-eyed Junco
- Cardinals
- Hepatic Tanager
- Summer Tanager
- Scarlet Tanager
- Western Tanager
- Crimson-collared Grosbeak
- Northern Cardinal
- Pyrrhuloxia
- Rose-breasted Grosbeak
- Black-headed Grosbeak
- Blue Grosbeak
- Lazuli Bunting
- Indigo Bunting
- Lazuli X Indigo Bunting
- Varied Bunting
- Painted Bunting
- Dickcissel
- Icterids
- Bobolink
- Red-winged Blackbird
- Tricolored Blackbird
- Eastern Meadowlark
- Lilian's Meadowlark
- Western Meadowlark
- Yellow-headed Blackbird
- Rusty Blackbird
- Brewer's Blackbird
- Common Grackle
- Boat-tailed Grackle
- Great-tailed Grackle
- Shiny Cowbird
- Bronzed Cowbird
- Brown-headed Cowbird
- Orchard Oriole
- Hooded Oriole
- Streak-backed Oriole
- Bullock's Oriole
- Spot-breasted Oriole
- Altamira Oriole
- Audubon's Oriole
- Baltimore Oriole
- Scott's Oriole
- Finches
- Gray-crowned Rosy-Finch
- Coastal Gray-crowned Rosy-Finch
- Interior Gray-crowned Rosy-Finch
- Pribilofs Gray-crowned Rosy-Finch
- Black Rosy-Finch
- Brown-capped Rosy-Finch
- Pine Grosbeak
- Purple Finch
- Cassin's Finch
- House Finch
- Red Crossbill
- White-winged Crossbill
- Common Redpoll
- Hoary Redpoll
- Pine Siskin
- Lesser Goldfinch
- Lawrence's Goldfinch
- American Goldfinch
- Evening Grosbeak
- Old World Sparrows
- House Sparrow
Alphabetical
- Albatross, Black-footed
- Albatross, Laysan
- Anhinga
- Auklet, Crested
- Auklet, Least
- Auklet, Parakeet
- Auklet, Rhinoceros
- Avocet, American
- Beardless-Tyrannulet, Northern
- Becard, Rose-throated
- Bittern, American
- Bittern, Least
- Black Hawk, Common
- Blackbird, Brewer's
- Blackbird, Red-winged
- Blackbird, Rusty
- Blackbird, Tricolored
- Blackbird, Yellow-headed
- Bluebird, Eastern
- Bluebird, Mountain
- Bluebird, Western
- Bluethroat
- Bobolink
- Bobwhite, Northern
- Brant
- Bufflehead
- Bunting, Indigo
- Bunting, Lark
- Bunting, Lazuli
- Bunting, Lazuli X Indigo
- Bunting, Painted
- Bunting, Snow
- Bunting, Varied
- Bushtit
- Canvasback
- Caracara, Crested
- Cardinal, Northern
- Catbird, Gray
- Chachalaca, Plain
- Chat, Yellow-breasted
- Chickadee, Black-capped
- Chickadee, Boreal
- Chickadee, Carolina
- Chickadee, Chestnut-backed
- Chickadee, Mexican
- Chickadee, Mountain
- Chuck-will's-widow
- Coot, American
- Cormorant, Brandt's
- Cormorant, Double-crested
- Cormorant, Neotropic
- Cormorant, Pelagic
- Cormorant, Red-faced
- Cowbird, Bronzed
- Cowbird, Brown-headed
- Cowbird, Shiny
- Crane, Sandhill
- Crane, Whooping
- Creeper, Brown
- Crossbill, Red
- Crossbill, White-winged
- Crow, American
- Crow, Fish
- Crow, Northwestern
- Cuckoo, Yellow-billed
- Curlew, Bristle-thighed
- Curlew, Long-billed
- Dickcissel
- Dipper, American
- Dove, Eurasian Collared
- Dove, Inca
- Dove, Mourning
- Dove, White-tipped
- Dove, White-winged
- Dowitcher, Long-billed
- Dowitcher, Short-billed
- Duck, American Black
- Duck, Harlequin
- Duck, Long-tailed
- Duck, Mottled
- Duck, Ring-necked
- Duck, Ruddy
- Duck, Tufted
- Duck, Wood
- Dunlin
- Eagle, Bald
- Eagle, Golden
- Eastern Whip-poor-will
- Egret, Cattle
- Egret, Great
- Egret, Reddish
- Egret, Snowy
- Eider, Common
- Eider, King
- Eider, Spectacled
- Eider, Steller's
- Falcon, Peregrine
- Finch, Cassin's
- Finch, House
- Finch, Purple
- Flicker, Gilded
- Flicker, Northern
- Flycatcher, Acadian
- Flycatcher, Alder
- Flycatcher, Ash-throated
- Flycatcher, Brown-crested
- Flycatcher, Buff-breasted
- Flycatcher, Cordilleran
- Flycatcher, Dusky
- Flycatcher, Dusky-capped
- Flycatcher, Gray
- Flycatcher, Great Crested
- Flycatcher, Hammond's
- Flycatcher, Least
- Flycatcher, Olive-sided
- Flycatcher, Pacific-slope
- Flycatcher, Scissor-tailed
- Flycatcher, Sulphur-bellied
- Flycatcher, Vermilion
- Flycatcher, Willow
- Flycatcher, Yellow-bellied
- Frigatebird, Magnificent
- Fulmar, Northern
- Gadwall
- Gallinule, Common
- Gallinule, Purple
- Gannet, Northern
- Gnatcatcher, Black-tailed
- Gnatcatcher, Blue-gray
- Gnatcatcher, California
- Godwit, Bar-tailed
- Godwit, Hudsonian
- Godwit, Marbled
- Golden-Plover, American
- Golden-Plover, Pacific
- Goldeneye, Barrow's
- Goldeneye, Common
- Goldfinch, American
- Goldfinch, Lawrence's
- Goldfinch, Lesser
- Goose, Barnacle
- Goose, Barnacle X Cackling
- Goose, Cackling
- Goose, Canada
- Goose, Greater White-fronted
- Goose, Pink-footed
- Goose, Ross's
- Goose, Snow
- Goshawk, Northern
- Grackle, Boat-tailed
- Grackle, Common
- Grackle, Great-tailed
- Grebe, Clark's
- Grebe, Eared
- Grebe, Horned
- Grebe, Least
- Grebe, Pied-billed
- Grebe, Red-necked
- Grebe, Western
- Grosbeak, Black-headed
- Grosbeak, Blue
- Grosbeak, Crimson-collared
- Grosbeak, Evening
- Grosbeak, Pine
- Grosbeak, Rose-breasted
- Ground-Dove, Common
- Grouse, Dusky
- Grouse, Sharp-tailed
- Grouse, Sooty
- Grouse, Spruce
- Guillemot, Black
- Guillemot, Pigeon
- Gull, Black-headed
- Gull, Bonaparte's
- Gull, California
- Gull, Franklin's
- Gull, Glaucous
- Gull, Glaucous-winged
- Gull, Glaucous-winged X Western
- Gull, Great Black-backed
- Gull, Heermann's
- Gull, Herring
- Gull, Iceland
- Gull, Ivory
- Gull, Laughing
- Gull, Lesser Black-backed
- Gull, Mew
- Gull, Ring-billed
- Gull, Sabine's
- Gull, Western
- Gyrfalcon
- Harrier, Northern
- Hawk, Broad-winged
- Hawk, Cooper's
- Hawk, Ferruginous
- Hawk, Gray
- Hawk, Harris's
- Hawk, Red-shouldered
- Hawk, Red-tailed
- Hawk, Rough-legged
- Hawk, Sharp-shinned
- Hawk, Swainson's
- Heron, Great Blue
- Heron, Green
- Heron, Little Blue
- Heron, Tricolored
- Hummingbird, Allen's
- Hummingbird, Anna's
- Hummingbird, Black-chinned
- Hummingbird, Blue-throated
- Hummingbird, Broad-billed
- Hummingbird, Broad-tailed
- Hummingbird, Buff-bellied
- Hummingbird, Calliope
- Hummingbird, Costa's
- Hummingbird, Lucifer
- Hummingbird, Rivoli's
- Hummingbird, Ruby-throated
- Hummingbird, Rufous
- Ibis, Glossy
- Ibis, White
- Ibis, White-faced
- Jaeger, Long-tailed
- Jaeger, Parasitic
- Jaeger, Pomarine
- Jay, Blue
- Jay, Brown
- Jay, Gray
- Jay, Green
- Jay, Mexican
- Jay, Pinyon
- Jay, Steller's
- Junco, Dark-eyed
- Junco, Gray-headed
- Junco, Oregon
- Junco, Pink-sided
- Junco, Red-backed
- Junco, Slate-colored
- Junco, Yellow-eyed
- Kestrel, American
- Killdeer
- Kingbird, Cassin's
- Kingbird, Eastern
- Kingbird, Gray
- Kingbird, Tropical
- Kingbird, Western
- Kingfisher, Belted
- Kingfisher, Green
- Kinglet, Golden-crowned
- Kinglet, Ruby-crowned
- Kiskadee, Great
- Kite, Mississippi
- Kite, Snail
- Kite, Swallow-tailed
- Kite, White-tailed
- Kittiwake, Black-legged
- Kittiwake, Red-legged
- Knot, Red
- Lark, Horned
- Limpkin
- Longspur, Chestnut-collared
- Longspur, Lapland
- Longspur, McCown's
- Loon, Common
- Loon, Pacific
- Loon, Red-throated
- Lovebird, Rosy-faced
- Magpie, Black-billed
- Magpie, Yellow-billed
- Mallard
- Mallard (Typical)
- Duck, Mexican
- Martin, Purple
- Meadowlark, Eastern
- Meadowlark, Lilian's
- Meadowlark, Western
- Merganser, Common
- Merganser, Hooded
- Merganser, Red-breasted
- Merlin
- Mexican Whip-poor-will
- Mockingbird, Northern
- Murre, Common
- Murre, Thick-billed
- Murrelet, Marbled
- Night-Heron, Black-crowned
- Night-Heron, Yellow-crowned
- Nighthawk, Common
- Nightjar, Buff-collared
- Nutcracker, Clark's
- Nuthatch, Brown-headed
- Nuthatch, Pygmy
- Nuthatch, Red-breasted
- Nuthatch, White-breasted
- Oriole, Altamira
- Oriole, Audubon's
- Oriole, Baltimore
- Oriole, Bullock's
- Oriole, Hooded
- Oriole, Orchard
- Oriole, Scott's
- Oriole, Spot-breasted
- Oriole, Streak-backed
- Osprey
- Ovenbird
- Owl, Barn
- Owl, Barred
- Owl, Boreal
- Owl, Burrowing
- Owl, Eastern Screech
- Owl, Elf
- Owl, Flammulated
- Owl, Great Gray
- Owl, Great Horned
- Owl, Long-eared
- Owl, Northern Hawk
- Owl, Northern Saw-whet
- Owl, Short-eared
- Owl, Snowy
- Owl, Spotted
- Oystercatcher, American
- Oystercatcher, Black
- Parakeet, White-winged
- Parula, Northern
- Parula, Tropical
- Pauraque, Common
- Pelican, American White
- Pelican, Brown
- Petrel, Black-capped
- Pewee, Greater
- Phainopepla
- Phalarope, Red
- Phalarope, Red-necked
- Phalarope, Wilson's
- Pheasant, Ring-necked
- Phoebe, Black
- Phoebe, Eastern
- Phoebe, Say's
- Pigeon, Band-tailed
- Pigeon, Rock
- Pigeon, White-crowned
- Pintail, Northern
- Pipit, American
- Pipit, Sprague's
- Plover, Black-bellied
- Plover, Mountain
- Plover, Piping
- Plover, Semipalmated
- Plover, Snowy
- Plover, Wilson's
- Poorwill, Common
- Prairie-Chicken, Greater
- Prairie-Chicken, Lesser
- Ptarmigan, Rock
- Ptarmigan, White-tailed
- Ptarmigan, Willow
- Puffin, Atlantic
- Puffin, Horned
- Puffin, Tufted
- Pygmy-Owl, Northern
- Pyrrhuloxia
- Quail, California
- Quail, Gambel's
- Quail, Scaled
- Rail, Clapper
- Rail, King
- Rail, Ridgway's
- Rail, Virginia
- Raven, Chihuahuan
- Raven, Common
- Razorbill
- Redhead
- Redpoll, Common
- Redpoll, Hoary
- Redstart, American
- Redstart, Painted
- Roadrunner, Greater
- Robin, American
- Robin, Rufous-backed
- Rosy-Finch, Black
- Rosy-Finch, Brown-capped
- Rosy-Finch, Gray-crowned
- Rosy-Finch, Coastal Gray-crowned
- Rosy-Finch, Interior Gray-crowned
- Rosy-Finch, Pribilofs Gray-crowned
- Sage-Grouse, Greater
- Sage-Grouse, Gunnison
- Sanderling
- Sandpiper, Baird's
- Sandpiper, Buff-breasted
- Sandpiper, Least
- Sandpiper, Pectoral
- Sandpiper, Purple
- Sandpiper, Rock
- Sandpiper, Semipalmated
- Sandpiper, Solitary
- Sandpiper, Spotted
- Sandpiper, Stilt
- Sandpiper, Upland
- Sandpiper, Western
- Sandpiper, White-rumped
- Sapsucker, Red-breasted
- Sapsucker, Red-breasted X Red-naped
- Sapsucker, Red-naped
- Sapsucker, Williamson's
- Sapsucker, Yellow-bellied
- Scaup, Greater
- Scaup, Lesser
- Scoter, Black
- Scoter, Surf
- Scoter, White-winged
- Screech-Owl, Western
- Screech-Owl, Whiskered
- Scrub-Jay, California
- Scrub-Jay, Florida
- Scrub-Jay, Island
- Scrub-Jay, Woodhouse's
- Shearwater, Audubon's
- Shearwater, Cory's
- Shearwater, Great
- Shearwater, Manx
- Shearwater, Pink-footed
- Shearwater, Sooty
- Shoveler, Northern
- Shrike, Loggerhead
- Siskin, Pine
- Skimmer, Black
- Snipe, Wilson's
- Solitaire, Townsend's
- Sora
- Sparrow, American Tree
- Sparrow, Bachman's
- Sparrow, Baird's
- Sparrow, Bell's
- Sparrow, Black-chinned
- Sparrow, Black-throated
- Sparrow, Botteri's
- Sparrow, Brewer's
- Sparrow, Cassin's
- Sparrow, Chipping
- Sparrow, Clay-colored
- Sparrow, Field
- Sparrow, Five-striped
- Sparrow, Fox
- Sparrow, Golden-crowned
- Sparrow, Grasshopper
- Sparrow, Harris's
- Sparrow, Henslow's
- Sparrow, House
- Sparrow, Lark
- Sparrow, Le Conte's
- Sparrow, Lincoln's
- Sparrow, Nelson's
- Sparrow, Olive
- Sparrow, Rufous-crowned
- Sparrow, Rufous-winged
- Sparrow, Sagebrush
- Sparrow, Saltmarsh
- Sparrow, Savannah
- Sparrow, Seaside
- Sparrow, Song
- Sparrow, Swamp
- Sparrow, Vesper
- Sparrow, White-crowned
- Sparrow, White-throated
- Spoonbill, Roseate
- Starling, European
- Stilt, Black-necked
- Stint, Red-necked
- Stork, Wood
- Storm-Petrel, Band-rumped
- Storm-Petrel, Wilson's
- Surfbird
- Swallow, Bank
- Swallow, Barn
- Swallow, Cave
- Swallow, Cliff
- Swallow, Northern Rough-winged
- Swallow, Tree
- Swallow, Violet-green
- Swamphen, Purple
- Swan, Mute
- Swan, Trumpeter
- Swan, Tundra
- Swift, Black
- Tanager, Hepatic
- Tanager, Scarlet
- Tanager, Summer
- Tanager, Western
- Tattler, Gray-tailed
- Tattler, Wandering
- Teal, Blue-winged
- Teal, Cinnamon
- Teal, Green-winged
- Tern, Aleutian
- Tern, Arctic
- Tern, Black
- Tern, Bridled
- Tern, Caspian
- Tern, Common
- Tern, Elegant
- Tern, Forster's
- Tern, Least
- Tern, Royal
- Tern, Sandwich
- Tern, Sooty
- Thrasher, Bendire's
- Thrasher, Brown
- Thrasher, California
- Thrasher, Crissal
- Thrasher, Curve-billed
- Thrasher, Le Conte's
- Thrasher, Long-billed
- Thrasher, Sage
- Thrush, Bicknell's
- Thrush, Clay-colored
- Thrush, Gray-cheeked
- Thrush, Hermit
- Thrush, Swainson's
- Thrush, Varied
- Thrush, Wood
- Titmouse, Black-crested
- Titmouse, Bridled
- Titmouse, Juniper
- Titmouse, Oak
- Titmouse, Tufted
- Towhee, Abert's
- Towhee, California
- Towhee, Canyon
- Towhee, Eastern
- Towhee, Green-tailed
- Towhee, Spotted
- Trogon, Elegant
- Turkey, Wild
- Turnstone, Black
- Turnstone, Ruddy
- Veery
- Verdin
- Vireo, Bell's
- Vireo, Black-capped
- Vireo, Black-whiskered
- Vireo, Blue-headed
- Vireo, Cassin's
- Vireo, Gray
- Vireo, Hutton's
- Vireo, Philadelphia
- Vireo, Plumbeous
- Vireo, Red-eyed
- Vireo, Warbling
- Vireo, White-eyed
- Vireo, Yellow-throated
- Vulture, Black
- Vulture, Turkey
- Wagtail, Eastern Yellow
- Wagtail, White
- Warbler, Arctic
- Warbler, Bay-breasted
- Warbler, Black-and-white
- Warbler, Black-throated Blue
- Warbler, Black-throated Gray
- Warbler, Black-throated Green
- Warbler, Blackburnian
- Warbler, Blackpoll
- Warbler, Blue-winged
- Warbler, Brewster's
- Warbler, Canada
- Warbler, Cape May
- Warbler, Cerulean
- Warbler, Chestnut-sided
- Warbler, Connecticut
- Warbler, Golden-cheeked
- Warbler, Golden-winged
- Warbler, Grace's
- Warbler, Hermit
- Warbler, Hooded
- Warbler, Kentucky
- Warbler, Kirtland's
- Warbler, Lawrence's
- Warbler, Lucy's
- Warbler, MacGillivray's
- Warbler, Magnolia
- Warbler, Mourning
- Warbler, Nashville
- Warbler, Olive
- Warbler, Orange-crowned
- Warbler, Palm
- Warbler, Pine
- Warbler, Prairie
- Warbler, Prothonotary
- Warbler, Red-faced
- Warbler, Swainson's
- Warbler, Tennessee
- Warbler, Townsend's
- Warbler, Virginia's
- Warbler, Wilson's
- Warbler, Worm-eating
- Warbler, Yellow
- Warbler, Yellow-rumped
- Warbler, Audubon's
- Warbler, Myrtle
- Warbler, Yellow-throated
- Waterthrush, Louisiana
- Waterthrush, Northern
- Waxwing, Bohemian
- Waxwing, Cedar
- Wheatear, Northern
- Whimbrel
- Whistling-Duck, Black-bellied
- Whistling-Duck, Fulvous
- Wigeon, American
- Wigeon, Eurasian
- Willet
- Wood-Pewee, Eastern
- Wood-Pewee, Western
- Woodcock, American
- Woodpecker, Acorn
- Woodpecker, American Three-toed
- Woodpecker, Arizona
- Woodpecker, Black-backed
- Woodpecker, Downy
- Woodpecker, Gila
- Woodpecker, Golden-fronted
- Woodpecker, Hairy
- Woodpecker, Ladder-backed
- Woodpecker, Lewis's
- Woodpecker, Nuttall's
- Woodpecker, Pileated
- Woodpecker, Red-bellied
- Woodpecker, Red-cockaded
- Woodpecker, Red-headed
- Woodpecker, White-headed
- Wren, Bewick's
- Wren, Cactus
- Wren, Canyon
- Wren, Carolina
- Wren, House
- Wren, Marsh
- Wren, Pacific
- Wren, Rock
- Wren, Sedge
- Wren, Sinaloa
- Wren, Winter
- Wrentit
- Yellowlegs, Greater
- Yellowlegs, Lesser
- Yellowthroat, Common
