Tui De Roy / Greater Flamingo (Phoenicopterus ruber) pair in territorial display while two other feed, Galapagos Islands, Ecuador

Eric Medard / Kestrel (Falco tunninculus) female with bird prey to feed young in nest, France, May

Eric Medard / Kestrel (Falco tunninculus) female with bird prey to feed young in nest, France, May

Paul Williams / Capybara (Hydrochoerus hydrochaeris) with Cattle tyrant (Machetornis rixosa) bird on its back looking for insects to feed on, Pantanal, Pocone, Brazil

Paul Williams / Capybara (Hydrochoerus hydrochaeris) with Cattle tyrant (Machetornis rixosa) bird on its back looking for insects to feed on, Pantanal, Pocone, Brazil

Martin Willis / Noisy Pitta (Pitta versicolor) carrying insects to feed young, Paluma Range National Park, Queensland, Australia

Martin Willis / Noisy Pitta (Pitta versicolor) carrying a small skink to feed young, Paluma Range National Park, Queensland, Australia

Martin Willis / Cockatiel (Nymphicus hollandicus) large flock descending to feed on the grass, Boulia, Queensland, Australia

Martin Willis / Budgerigar (Melopsittacus undulatus) flock descending to feed on grass, Boulia, Queensland, Australia

Ernie Janes / Great tit (Parus major) three juveniles waiting for parent bird to feed them, Norfolk, UK, June

Colin Varndell / Sick male Chaffinch (Fringilla colebs) attempting to feed from bird table. Dorset, UK March 2010

Tui De Roy / Tui (Prosthemadera novaeseelandiae) hanging on branch to feed on nectar from flowers with pollen on beak, New Zealand

Tui De Roy / Tui (Prosthemadera novaeseelandiae) hanging on branch to feed on nectar from flowers in spring, New Zealand

Tui De Roy / Common Cactus-Finch (Geospiza scandens) using long beak to feed on Opuntia (Opuntia sp) cactus flower, Galapagos Islands, Ecuador

Murray Cooper / Black-billed Mountain-Toucan (Andigena nigrirostris) with chick prey to feed young, Ecuador

David Woodfall / Red squirrel (Sciurus vulgaris) trying to feed on nuts from bird feeder, UK

Peter Cairns / Red squirrel (Sciurus vulgaris) in pine forest attempting to feed from bird feeder, Cairngorms NP, Highland, Scotland, UK, February

Pete Oxford / Gentoo Penguin (Pygoscelis papua) group coming down highway, each day the penguins go between their colonies and the sea to feed, walking long distances on land, Keppel Island, Falkland Islands

Tim Laman / Adult and juvenile Roseate Spoonbills rest, groom, and feed in the lagoon of a mangrove island, Alafia Bank Bird Sanctuary, Sunken Island, Tampa Bay, Florida, USA.

Tim Laman / A flock of adult and juvenile Roseate Spoonbill (Platalea ajaja) rest, preen and feed on the shore of a mangrove island with chimneys of a large electric power plant in the background, Alafia Bank Bir...

Fred Bavendam / Ruddy Turnstone (Arenaria interpres) flock stopping at Delaware Bay to feed on Horseshoe Crab eggs while flying from South America to arctic nesting grounds, Cape May, New Jersey

Michael Quinton / Red-throated Loon (Gavia stellata) with fish to feed young, Alaska

Adrian Davies / Bird flu poster telling people not to feed wild birds, Hong Kong, China, 2008

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) world's only nocturnal and pelagic gull departs at dusk to feed offshore, Genovesa Island, Galapagos Islands, Ecuador

Pete Oxford / White woodpeckers feed at bird table {Melanerpes candidus} Cerrado, Piaui, Brazil

Winfried Wisniewski / Ruppell's Griffon (Gyps rueppellii) flock gathering to feed on carcass, Africa

Michael & Patricia Fogden / Blue-crowned Motmot (Momotus momota) carrying rain frog to feed to nestlings, rainforest, Costa Rica

Duncan Usher / Garden Warbler (Sylvia borin) parent at nest with chicks, preparing to feed them a caterpillar, Europe

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding capelin in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding capelin in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding capelin in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding capelin in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Thomas Mangelsen / Timber Wolf (Canis lupus) group and Common Raven (Corvus corax) feed on Elk (Cervus elaphus) carcass, National Elk Refuge, Wyoming

Mark Moffett / White-eared Pheasant (Crossoptilon crossoptilon) is drawn to the temple by Buddhist monks who feed them, Sichuan Province, China

Yva Momatiuk & John Eastcott / Western Sandpiper (Calidris mauri) migrating to breed on arctic coast, large flock flying low over mudflats where they feed on worms, insects and crustaceans in the spring, Copper River Delta, Alaska

Yva Momatiuk & John Eastcott / Western Sandpiper (Calidris mauri) migrating to breed on arctic coast, large flock flying low over mudflats where they feed on worms, insects and crustaceans in the spring, Copper River Delta, Alaska

Yva Momatiuk & John Eastcott / Western Sandpiper (Calidris mauri) migrating to breed on arctic coast, large flock flying low over mudflats where they feed on worms, insects and crustaceans in the spring, Copper River Delta, Alaska

Yva Momatiuk & John Eastcott / Western Sandpiper (Calidris mauri) migrating to breed on arctic coast, large flock flying low over mudflats of Copper River Delta where they feed on worms, insects and crustaceans in the spring, Alask...

Yva Momatiuk & John Eastcott / Western Sandpiper (Calidris mauri) migrating to breed on arctic coast, large flock flying low over mudflats where they feed on worms, insects and crustaceans in the spring, Copper River Delta, Alaska

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs at dusk to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Kea (Nestor notabilis) perched on sign that reads 'Do Not Feed the Keas', Fox Glacier, Westland National Park, South Island, New Zealand

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs at dusk to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs at dusk to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Flip Nicklin / White Tern (Gygis alba) landing with fish to feed to its chick, Hawaiian Leeward Islands, Hawaii

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, flock walking in a line in saline lake tinted red by diatoms that the flamingos feed on, Laguna Colorada, Andean altiplano above 4,000 meters elevation, Bol...

Fred Bavendam / Little Blue Penguin (Eudyptula minor) chick waiting at burrow for parents to come feed it, Port Campbell, Victoria, Australia

Fred Bavendam / Little Blue Penguin (Eudyptula minor) two chicks waiting at burrow for parents to come feed them, Port Campbell, Victoria, Australia

Fred Bavendam / Little Blue Penguin (Eudyptula minor) two chicks and parents who have just arrived to feed them, Port Campbell, Victoria, Australia

Fred Bavendam / Little Blue Penguin (Eudyptula minor) two chicks and parents who have just arrived to feed them, Port Campbell, Victoria, Australia

Tui De Roy / Weka (Gallirallus australis) an endemic flightless rail parent carrying small bird to feed its chicks, Golden Bay, South Island, New Zealand

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, flock feeding, highly adapted to feed on microscopic diatoms, Laguna Colorada, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, pair feeding in Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, pair feeding in Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, feeding in Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, wading, Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, feeding in Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Puna Flamingo (Phoenicopterus jamesi) rare, feeding in Laguna Colorada, highly adapted to feed on microscopic diatoms, Andean altiplano above 4,000 meters elevation, Bolivia

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs at dusk to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Swallow-tailed Gull (Creagrus furcatus) endemic, world's only nocturnal and pelagic gull departs at dusk to feed far offshore, Genovesa Tower Island, Galapagos Islands, Ecuador

Pete Oxford / Long billed vultures {Gyps indicus} feed on dead Buffalo Rajasthan, India

Ross Hoddinott / Brown rat {Rattus norvegicus} climbing to feed on nuts in bird feeder. Cornwall, UK

Tui De Roy / Greater Flamingo (Phoenicopterus ruber) pair in territorial display while three others feed, Galapagos Islands, Ecuador

Tui De Roy / Greater Flamingo (Phoenicopterus ruber) pair in territorial display while two others feed, Galapagos Islands, Ecuador

Piotr Naskrecki / Black-headed Gull (Chroicocephalus ridibundus) pair landing to feed on horseshoe crab eggs, Delaware

Michael Quinton / Bald Eagle (Haliaeetus leucocephalus) group congregating in cottonwood trees nea Chilkat River to feed on salmon, Alaska

Norbert Wu / Adelie Penguin (Pygoscelis adeliae) group at rookery, starving parents seek access to sea to feed but are fearful of leopard seals, Cape Bird, Antarctica

Jim Brandenburg / American Bison (Bison bison) grazing while Brown-headed Cowbirds (Molothrus ater) feed on grass seed and insects stirred up by the Buffalo, South Dakota

Pete Oxford / Hermit crabs {Coenibita rugosus} + {C phaeton} feed on Red-tailed tropic bird

Elio Della Ferrera / Indian white backed vulture juveniles feed on cattle {Gyps bengalensis} Thar desert, India

Mitsuaki Iwago / Domestic Cat (Felis catus) group at the fishing dock watch as fishermen feed a pelican, Mediterranean Sea, Europe

Nigel Bean / Brown rats feed on seed dropped from bird feeder {Rattus norvegicus} Tyneside UK

Nigel Bean / Brown rat feeds on seed dropped from bird feeder {Rattus norvegicus} Tyneside UK