Fergus Gill / 2020VISION / Tree Sparrow (Passer montanus) Perching on a snow covered branch. Perthshire, Scotland.

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis) perching on pine cones, North America

Anup Shah / Lilac-breasted roller (Coracias caudata) perched on the back of a Common zebra (Equus quagga). Masai Mara National Reserve, Kenya. December

Chris Gomersall / Golden eagle (Aquila chrysaetos) sub-adult in winter snow shower, captive bird, Speyside, Scotland, February

Donald M. Jones / Black-capped Chichadee (Poecile atricapillus) perching on snow-covered berries, western Montana

Luciano Candisani / Troupial (Icterus icterus) perched in flowering tree, Cerrado Ecosystem, Brazil

Patricio Robles Gil / Gambel's Quail (Callipepla gambelii) adult perched atop a blooming cactus, El Pinacate/Gran Desierto de Altar Biosphere Reserve, Sonora, Mexico

Tom Vezo / Blackpoll Warbler (Setophaga striata) male, portrait, Rio Grande Valley, Texas

Tom Vezo / Baltimore Oriole (Icterus galbula) male perched on a branch, Rio Grande Valley, Texas

Tom Vezo / Baltimore Oriole (Icterus galbula) juvenile male perched on a branch, Rio Grande Valley, Texas

Tom Vezo / Baltimore Oriole (Icterus galbula) male perched on a branch, Texas

Pete Oxford / Red-crested Cardinal (Paroaria coronata) perched on branch, Pantanal, Brazil

Tom Vezo / Turkey Vulture (Cathartes aura) perching on Cardon (Pachycereus pringlei) cactus, sunning itself with wings spread, Sonora, Mexico

ZSSD / California Condor (Gymnogyps californianus) spreading wings, native to California

Tim Fitzharris / Malachite Kingfisher (Alcedo cristata) perching on reeds, Kenya

Gerry Ellis / Hippopotamus (Hippopotamus amphibius) swimming in water lettuce, with Cattle Egret (Bulbulcus ibis) perched on head, Serengeti National Park, Tanzania

Gerry Ellis / Cape Sugarbird (Promerops cafer) male perching on Protea flowers (Mimetes protea), Kirstenbosch Garden, South Africa

Tom Vezo / Hermit Thrush (Catharus guttatus) adult perching on rock, Santa Rita Mountains, Arizona

Patricio Robles Gil / Blue-footed Booby (Sula nebouxii) perched on rocks and cactus on San Pedro Martir Island, Gulf of California, Mexico

Michael & Patricia Fogden / Keel-billed Toucan (Ramphastos sulfuratus) perched in tree, Costa Rican rainforest

Michael & Patricia Fogden / Keel-billed Toucan (Ramphastos sulfuratus) perched in tree, Costa Rican rainforest

Claus Meyer / Swallow-tailed Manakin (Chiroxiphia caudata) perching on moss covered branch, Atlantic Forest ecosystem, Brazil

Claus Meyer / Striped Manakin (Machaeropterus regulus) couple perching on branch, Atlantic Forest ecosystem, Brazil

Gerry Ellis / African Grey Parrot (Psittacus erithacus) portrait, east Africa

Claus Meyer / Toco Toucan (Ramphastos toco) calling while perching on branch, Cerrado, Brazil

Claus Meyer / Red-tailed Amazon (Amazona brasiliensis) pair, southern Brazil

Tom Vezo / Black-capped Chickadee (Poecile atricapillus) in Bayberry bush, Long Island, New York

Tom Vezo / Scarlet Tanager (Piranga olivacea) male perched in tree, Long Island, New York

Tom Vezo / Baltimore Oriole (Icterus galbula) female on perch, Long Island, New York

Thomas Mangelsen / Florida Jay (Aphelocoma coerulescens) perching in tree, Oscar Schever State Park, Florida

Thomas Mangelsen / Spotted Owl (Strix occidentalis) in old growth forest, southwest Oregon

Pete Oxford / Blue-fronted Parrot (Amazona aestiva) perched in tree, Piaui State, northeast Brazil

Pete Oxford / Golden Tanager (Tangara arthus) perched in Manu cloud forest, Peru

Pete Oxford / Andean Cock-of-the-rock (Rupicola peruvianus), Manu cloud forest, Peru

Thomas Mangelsen / Bald Eagle (Haliaeetus leucocephalus) adults on snags, North America

Thomas Mangelsen / Bald Eagle (Haliaeetus leucocephalus) adult perching on snag, North America

Tom Vezo / Purple Martin (Progne subis) and Tree Swallow (Tachycineta bicolor) mixed group perching on branch, Crane Creek, Ohio

Michael & Patricia Fogden / Violet-crowned Woodnymph (Thalurania colombica) hummingbird male perched in lowland rainforest, Costa Rica

Flip de Nooyer / Black-necked Aracari (Pteroglossus aracari) a toucanet, perching on branch, Pantanal, Brazil

Claus Meyer / Red-tailed Amazon (Amazona brasiliensis), Atlantic Forest, Brazil

Tom Vezo / Harris' Hawk (Parabuteo unicinctus) perching on branch with wings spread, southeast Arizona

Pete Oxford / Scaled Dove (Columbina squammata) four huddled together on branch, Brazil

Konrad Wothe / Peregrine Falcon (Falco peregrinus) perching on rocks, Colorado

Konrad Wothe / Brown Pelican (Pelecanus occidentalis) perched on rocks with ocean waves in background, Galapagos Islands, Ecuador

Konrad Wothe / Barn Owl (Tyto alba) perching on barn window, North America

Konrad Wothe / Cattle Tyrant (Machetornis rixosa) on Capybara (Hydrochoerus hydrochaeris), Pantanal, Brazil

Gerry Ellis / Tawny Frogmouth (Podargus strigoides), Australia

Gerry Ellis / African Grey Parrot (Psittacus erithacus) preening, east Africa

Gerry Ellis / Rhinoceros Hornbill (Buceros rhinoceros), southeast Asia

Gerry Ellis / Sulphur-crested Cockatoo (Cacatua galerita) perching on branch, New Guinea

Konrad Wothe / Red and Green Macaw (Ara chloroptera) pair, Pantanal, Brazil

Jim Brandenburg / Barred Owl (Strix varia) sitting on branch, Minnesota

Michio Hoshino / Bald Eagle (Haliaeetus leucocephalus) perching on a snag, Alaska

Michael Quinton / Pine Grosbeak (Pinicola enucleator) male, perched atop tree, Alaska

Michael Quinton / Northern Hawk Owl (Surnia ulula) baby perching on branch, Alaska

Tim Fitzharris / Snowy Owl (Nyctea scandiaca) amid dry grass, British Columbia, Canada

Tim Fitzharris / Great Gray Owl (Strix nebulosa) perching on a snow-covered branch, British Columbia, Canada

Tim Fitzharris / Northern Saw-whet Owl (Aegolius acadicus) perching in a wild rose bush, British Columbia, Canada

Michael Quinton / Northern Hawk Owl (Surnia ulula) perching on branch during snowfall in spring, Alaska

Tui De Roy / Common Cactus-Finch (Geospiza scandens) feeding on Opuntia (Opuntia sp) cactus blossom, Academy Bay, Santa Cruz Island, Galapagos Islands, Ecuador

Michio Hoshino / Bald Eagle (Haliaeetus leucocephalus) calling from perch, Alaska

Michio Hoshino / Bald Eagle (Haliaeetus leucocephalus) perching in snowy tree, Alaska

Tui De Roy / Volcan Alcedo Giant Tortoise (Chelonoidis nigra vandenburghi) with Galapagos Hawk (Buteo galapagoensis) perched on back, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Tim Fitzharris / Snowy Owl (Nyctea scandiaca) adult perching on a low stump in a field of green grass, British Columbia, Canada

Michael Quinton / Merlin (Falco columbarius) perching in tree during snowfall, spring, Alaska

Michael Quinton / Willow Ptarmigan (Lagopus lagopus) with fall plumage perching on branch, Alaska

Tui De Roy / Volcan Alcedo Giant Tortoise (Chelonoidis nigra vandenburghi) Galapagos Hawk (Buteo galapagoensis) riding on back, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Jim Brandenburg / Barred Owl (Strix varia) perching in tree, Minnesota

Michio Hoshino / Bald Eagle (Haliaeetus leucocephalus) trio sitting on snag, Alaska

Michio Hoshino / Horned Puffin (Fratercula corniculata) group on rocky cliff, Alaska

Jim Brandenburg / Blue Jay (Cyanocitta cristata) perching in pine tree, Minnesota

Mark Moffett / Emerald Toucanet (Aulacorhynchus prasinus), Monteverde Cloud Forest Reserve, Costa Rica

Tim Fitzharris / Western Screech Owl (Megascops kennicottii) perching in a tree with snow on its head, British Columbia, Canada

Tim Fitzharris / Great Horned Owl (Bubo virginianus), pale form, perching in a snow-covered tree, British Columbia, Canada

Neil Lucas / Crowned hawk eagle, Zimbabwe. Captive bird

SIMON KING / Female peregrine on rocks in a quarry, UK. Captive bird.

Richard Du Toit / Red-collared Widowbird (Euplectes ardens) male in breeding plumage, Rietvlei Nature Reserve, Gauteng, South Africa

Richard Du Toit / Cattle Egret (Bubulcus ibis) perched on a male Eland (Taurotragus oryx), Rietvlei Nature Reserve, Gauteng, South Africa

Donald M. Jones / Common Redpoll (Carduelis flammea) male perching among berries, Troy, Montana

Tom Vezo / Rose-breasted Grosbeak (Pheucticus ludovicianus) perching in blooming Beach Plum (Prunus maritima) tree, Long Island, New York

Martin Willis / Spotted Catbird (Ailuroedus melanotis), Atherton Tableland, Queensland, Australia

Martin Willis / Brown Falcon (Falco berigora), Winton, Queensland, Australia

Scott Leslie / Wood Stork (Mycteria americana) group roosting in Dwarf Cypress (Taxodium sp), Everglades National Park, Florida

Kevin Schafer / West Indian Whistling-Duck (Dendrocygna arborea) roosting in tree, Dominican Republic

Donald M. Jones / Townsend's Solitaire (Myadestes townsendi) perching on berries covered in snow, Troy, Montana

Donald M. Jones / Townsend's Solitaire (Myadestes townsendi) perching on berries covered in snow, Troy, Montana

Donald M. Jones / Red-tailed Hawk (Buteo jamaicensis) sub-adult perching on a post, Mission Valley, western Montana

Kerstin Hinze / Pygmy owl (Glaucidium passerinum) with bird prey sitting on a branch with lichens, Carinthia, Austria

Tui De Roy / Red-footed Booby (Sula sula) perching beside nest in mangroves, Galapagos Islands, Ecuador

Martin Willis / Golden Bowerbird (Prionodura newtoniana) male perching on lek, Mount Hypipamee National Park, Queensland, Australia

Steve Gettle / Red-tailed Hawk (Buteo jamaicensis) perching on fence post amid thistles, Michigan

Pete Oxford / Magnificent Frigatebird (Fregata magnificens) perching on a mangrove branch. Sian Ka'an Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico.

Pete Oxford / Cuban Parakeet (Aratinga euops) perching in tree, Cuba

Murray Cooper / Red-bellied Macaw (Ara manilata) group perching in palm, Amazon, Ecuador

Donald M. Jones / Pine Siskin (Carduelis pinus) perching on pine cone, western Montana