O
Oilbird
Openbill, Asian
Oriole, Altamira
Oriole, Audubon’s
Oriole, Baltimore
Oriole, Black-vented
Oriole, Bullock’s
Oriole, Hooded
Oriole, Orchard
Oriole, Scott’s
Oriole, Spot-breasted
Oriole, Streak-backed
Oropendola, Chestnut-headed
Oropendola, Crested
Oropendola, Montezuma
Osprey
Ovenbird
Owl, Amazonian Pygmy-
Own, American Barn
Owl, Barred
Owl, Black-and-white
Owl, Blakiston’s Fish
Owl, Boreal
Owl, Burrowing
Owl, Cuban Pygmy-
Owl, Flammulated
Owl, Fulvous
Owl, Great Gray
Owl, Great Horned
Owl, Long-eared
Owl, Mottled
Owl, Northern Hawk
Owl, Northern Pygmy-
Owl, Northern Saw-whet
Owl, Pacific Screech-
Owl, Powerful
Owl, Puerto Rican Screech-
Owl, Rufous
Owl, Rufous-banded
Owl, Short-eared
Owl, Snowy
Owl, Spectacled
Owl, Spotted
Owl, Striped
Owl, Tawny-browed
Owl, Tropical Screech-
Owl, Ural
Owl, Western Screech-
Owl, Whiskered Screech-
Owlet, Pearl-spotted
Oystercatcher, American
Oystercatcher, Australasian Pied
Oystercatcher, Black
Oystercatcher, Blackish
Oystercatcher, Chatham Island Pied
Oystercatcher, Eurasian
Oystercatcher, Magellanic
Oystercatcher, Sooty
Oystercatcher, Variable
P
Palm Swift, Fork-tailed
Parakeet, Cuban
Parakeet, Green
Parakeet, Jandaya
Parakeet, Monk
Parakeet, Nanday
Parakeet, Orange-chinned
Parakeet, Orange-fronted
Parakeet, Peach-fronted
Parakeet, Red-masked
Parakeet, Rose-ringed
Parakeet, Sulphur-winged
Parakeet, Yellow-chevroned
Pardalote, Forty-spotted
Pardalote, Spotted
Pardalote, Striated
Parrot, Blue-headed
Parrot, Brown-hooded
Parrot, Double-eyed Fig-
Parrot, King
Parrot, Lilac-crowned
Parrot, Mulga
Parrot, Puerto Rican
Parrot, Red-crowned
Parrot, Red-lored
Parrot, Red-rumped
Parrot, Red-winged
Parrot, Senegal
Parrot, Thick-billed
Parrot, Turquoise-fronted
Parrot, White-fronted
Parrot, Yellow-crowned
Parrot, Yellow-headed
Parrot, Yellow-lored
Parrotlet, Green-rumped
Parrotlet, Spectacled
Partridge, Gray
Rufous-throated Partridge
Partridge, Scaly-breasted
Parula, Northern
Parula, Tropical
Pauraque, Common
Peacock-Pheasant, Gray
Pelican, American White
Pelican, Australian
Pelican, Brown
Pelican, Great White
Pelican, Peruvian
Pelican, Pink-backed
Pelican, Spot-billed
Penguin, Adelie
Penguin, Chinstrap
Penguin, Erect-crested
Penguin, Gentoo
Penguin, King
Penguin, Little Blue
Penguin, Macaroni
Penguin, Magellanic
Penguin, Royal
Penguin, Snares Island
Penguin, Western Rockhopper
Penguin, Yellow-eyed
Peppershrike, Rufous-browed
Petrel, Antarctic
Petrel, Black-capped
Petrel, Bonin
Petrel, Cape
Petrel, Cook’s
Petrel, Northern Giant
Petrel, Southern Giant
Petrel, Trindade
Petrel, Westland
Petrel, White-chinned
Pewee, Cuban
Pewee, Eastern Wood-
Pewee, Greater
Pewee, Western Wood-
Phainopepla
Phalarope, Red
Phalarope, Red-necked
Phalarope, Wilson’s
Pheasant, Hume’s
Pheasant, Ring-necked
Pheasant, Silver
Phoebe, Black
Phoebe, Eastern
Phoebe, Say’s
Piculet, Grayish
Piculet, Plain-breasted
Pigeon, Band-tailed
Pigeon, Bare-eyed
Pigeon, Chatham Island
Pigeon, Crested
Pigeon, Mountain Imperial-
Pigeon, Picazuro
Pigeon, Plumbeous
Pigeon, Red-billed
Pigeon, Rock
Pigeon, Scaly-naped
Pigeon, Squatter
Pintail, Northern
Pintail, White-cheeked
Pintail, Yellow-billed
Piping-Guan, Blue-throated
Piping-Guan, Red-throated
Pipit, American
Pipit, Auckland Island
Pipit, Campbell Island
Pipit, Olive-backed
Pipit, Paddyfield
Plantain-eater, Western
Plover, American Golden-
Plover, Black-bellied
Plover, Collared
Plover, Common Ringed
Plover, European Golden-
Plover, Greater Sand-
Plover, Hooded
Plover, Little Ringed
Plover, Malaysian
Plover, Mountain
Plover, Pacific Golden-
Plover, Piping
Plover, Red-capped
Plover, Semipalmated
Plover, Shore
Plover, Snowy
Plover, Spur-winged
Plover, Tibetan Sand-
Plover, Wilson’s
Poorwill, Common
Potoo, Common
Potoo, Great
Potoo, Northern
Potoo, Rufous
Prairie-Chicken, Greater
Prairie-Chicken, Lesser
Prinia, Hill
Prion, Broad-billed
Ptarmigan, Rock
Ptarmigan, White-tailed
Ptarmigan, Willow
Puffback, Northern
Puffbird, Rufous-necked
Puffbird, Striolated
Puffbird, Two-banded
Puffleg, Golden-breasted
Puffin, Atlantic
Puffin, Horned
Puffin, Tufted
Pyrrhuloxia
Q
Quail, California
Quail, Elegant
Quail, Gambell’s
Quail, Montezuma’s
Quail, Mountain
Quail, Scaled
Quetzal, Eared
Quetzal, Golden-headed
Quetzal, Resplendent
R
Racquet-tail, Booted
Rail, Black
Rail, Clapper
Rail, King
Rail, Ridgway’s
Rail, Virginia
Raven, Chihuahuan
Raven, Common
Rayadito, Thorn-tailed
Razorbill
Redhead
Redpoll
Redshank, Common
Redshank, Spotted
Redstart, American
Redstart, Painted
Redstart, Slate-throated
Redstart, White-capped
Rhea, Greater
Riflebird, Victoria’s
Roadrunner, Greater
Robin, American
Robin, Dusky
Robin, Eastern Yellow
Robin, Flame
Robin, Hooded
Robin, Oriental Magpie
Robin, Pink
Robin, Red-capped
Robin, Rufous-backed
Robin, White-tailed
Roller, Abyssinian
Rosella, Crimson
Rosella, Green
Rosella, Pale-headed
Rosy-Finch, Black
Rosy-Finch, Brown-capped
Rosy-Finch, Gray-crowned
Ruby, Brazilian
Ruff
S
Sabrewing, Violet
Sabrewing, Wedge-tailed
Saltator, Black-throated
Saltator, Blue-gray
Saltator, Buff-throated
Saltator, Cinnamon-bellied
Saltator, Green-winged
Saltator, Orinocan
Sanderling
Sandpiper, Baird’s
Sandpiper, Buff-breasted
Sandpiper, Common
Sandpiper, Curlew
Sandpiper, Least
Sandpiper, Marsh
Sandpiper, Pectoral
Sandpiper, Purple
Sandpiper, Rock
Sandpiper, Semipalmated
Sandpiper, Solitary
Sandpiper, Spoon-billed
Sandpiper, Spotted
Sandpiper, Stilt
Sandpiper, Upland
Sandpiper, Western
Sandpiper, Wood
Sapphire, Blue-chinned
Sapphirewing, Great
Sapsucker, Red-breasted
Sapsucker, Red-naped
Sapsucker, Williamson’s
Sapsucker, Yellow-bellied
Scaup, Greater
Scaup, Lesser
Scaup, New Zealand
Schiffronis, Brown-winged
Scoter, Black
Scoter, Surf
Scoter, White-winged
Screamer, Southern
Scrubfowl, Orange-footed
Scrubwren, White-throated
Seedeater, Cinnamon-rumped
Seedeater, Double-collared
Seedeater, Morelet’s
Seedeater, Rudy-breasted
Seedsnipe, Rufous-bellied
Seriema, Red-legged
Shag, Antarctic
Shag, Auckland Island
Shag, Bounty Island
Shag, Blue-eyed
Shag, Campbell Island
Shag, Chatham Island
Shag, King
Shag, Macquarie
Shag, Pied
Shag, Spotted
Shama, White-rumped
Shearwater, Black-vented
Shearwater, Cory’s
Shearwater, Fluttering
Shearwater, Great
Shearwater, Hutton’s
Shearwater, Pink-footed
Shearwater, Sooty
Sheathbill, Snowy
Shelduck, Paradise
Shelduck, Radjah
Shoveler, Australasian
Shoveler, Northern
Shrike, Brown
Shrike, Loggerhead
Shrike, Northern
Shrike-Tanager, White-winged
Shrike-Thrush, Bower’s
Shrike-Thrush, Grey
Sibia, Black-headed
Sierra-Finch, Plumbeous
Silky-flycatcher, Gray
Sirystes, Sibilant
Siskin, Black-headed
Siskin, Pine
Skimmer, Black
Skua, Brown
Skua, Chilean
Skua, Great
Skua, South Polar
Snipe, Auckland Island
Snipe, Magellanic
Snipe, Paraguayan
Snipe, Wilson’s
Snowfinch, White-winged
Solitaire, Brown-backed
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, Bridled
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, Java
Sparrow, Lark
Sparrow, LeConte’s
Sparrow, Lincoln’s
Sparrow, Nelson’s
Sparrow, Northern Gray-headed
Sparrow, Olive
Sparrow, Rufous-collared
Sparrow, Rufous-crowned
Sparrow, Rufous-winged
Sparrow, Sagebrush
Sparrow, Saltmarsh
Sparrow, Savannah
Sparrow, Seaside
Sparrow, Song
Sparrow, Stripe-headed
Sparrow, Swamp
Sparrow, Vesper
Sparrow, White-crowned
Sparrow, White-throated
Sparrow, Zapata
Spinebill, Eastern
Spinebill, Yellow-chinned
Spoonbill, African
Spoonbill, Roseate
Spoonbill, Royal
Spoonbill, Yellow
Starfrontlet, Buff-winged
Starling, Black-collared
Starling, European
Starling, Long-tailed Glossy
Starling, Metallic
Starthroat, Long-billed
Starthroat, Plain-capped
Stilt, Black-necked
Stilt, Black-winged
Stilt, Pied
Stint, Long-toed
Stint, Red-necked
Stonechat, European
Stork, Maguari
Stork, Wood
Stork, Yellow-billed
Storm-Petrel, Band-rumped
Storm-Petrel, Black
Storm-Petrel, Wedge-rumped
Storm-Petrel, Wilson’s
Sunangel, Tourmaline
Sunbeam, Shinning
Sunbird, Beautiful
Sunbird, Mouse-brown
Sunbird, Olive-backed
Sunbird, Pygmy
Sunbittern
Surfbird
Swallow, Bank
Swallow, Barn
Swallow, Brown-bellied
Swallow, Cliff
Swallow, Northern Rough-winged
Swallow, Red-rumped
Swallow, Rufous-chested
Swallow, Southern Rough-winged
Swallow, Tree
Swallow, Violet-green
Swallow, Welcome
Swallow, White-winged
Swallow, Wire-tailed
Swamphen, Australasian
Swamphen, Purple
Swan, Black
Swan, Mute
Swan, Trumpeter
Swan, Tundra
Swan, Whooper
Swift, African Palm
Swift, Alpine
Swift, Black
Swift, Common
Swift, Vaux’s
Sylph, Long-tailed
Sylph, Violet-tailed