Doug Gimesy / Little pied cormorant (Microcarbo melanoleucos) standing on intertidal rocks, feeding on fish prey, Port Philip Bay, Victoria, Australia.

Jussi Murtosaari / Fieldfare (Turdus pilaris) perched in Rowan (Sorbus sp.) tree, feeding on berries, Finland. October.

Jussi Murtosaari / Two Broad-bordered bee hawkmoths (Hemaris fuciformis) nectaring on wildflower, Finland. July.

Jussi Murtosaari / Bank vole (Clethrionomys glareolus) standing on hind legs, feeding on Strawberry (Fragaria sp.) leaves, Finland. July.

Linda Pitkin / Green turtle (Chelonia mydas) resting on seabed feeding on Seagrass (Halophila stipulacea) with a Remora (Echeneis naucrates) on its back and shoals of small fish swimming around, Marsa Alam, Egypt, R...

Pal Hermansen / Melodius blackbird (Dives dives) attempting to catch a butterfly which is flying behind a plexiglass window, Costa Rica.

Roger Powell / Two Bearded vultures (Gypaetus barbatus) fighting over food, one with wings spread in threatening posture, Lamiana, Aragon, Spanish Pyrenees, Spain. April.

Joel Sartore / Photo Ark / Proboscis monkey (Nasalis larvatus) male using its hands to pick food up and eat. The animal leaves the frame. Taman Safari Prigen. Captive. Endangered.

Paul Harcourt Davies / Silver washed fritillary (Argynnis paphia) female, resting on kitchen curtains feeding from whatever has been deposited from the air, Podere Montecucco, Orvieto, Umbria, Italy. June.

Paul Harcourt Davies / Black-veined white butterfly (Aporia crataegi) nectaring on Hairy vetch (Vicia villosa) flower, Campo Imperatore, Gran Sasso, Abruzzo, Italy. May.

Phil Savoie / Buff-tailed bumblebee (Bombus terrestris) nectaring on Cucumber (Cucumis sativus) flower, Monmouthshire, Wales, UK.

Phil Savoie / Buff-tailed bumblebee (Bombus terrestris) nectaring on Cucumber (Cucumis sativus) flower, Monmouthshire, Wales, UK.

Phil Savoie / Red-tailed bumblebee (Bombus lapidarius) nectaring on flower (Allium sp.), Monmouthshire, Wales UK. July.

Phil Savoie / Red-tailed bumblebee (Bombus lapidarius) nectaring on flower (Allium sp.), Monmouthshire, Wales UK. July. Cropped.

Phil Savoie / Red-tailed bumblebee (Bombus lapidarius) nectaring on flower (Allium sp.), Monmouthshire, Wales UK. July. Cropped.

Phil Savoie / Buff-tailed bumblebee (Bombus terrestris) nectaring on flower (Dahlia sp.), Monmouthshire, Wales, UK.

Phil Savoie / Buff-tailed bumblebee (Bombus terrestris) nectaring on flower, Monmouthshire, Wales, UK.

Phil Savoie / Buff-tailed bumblebee (Bombus terrestris) nectaring on flower, Monmouthshire, Wales, UK.

Phil Savoie / Hairy footed flower bee (Anthophora plumipes) nectaring on Dwarf narcissus (Narcissus canaliculatus), Monmouthshire Wales, UK. March.

Jack Perks / Pike (Esox lucius) catching a Mayfly (Ephemeroptera sp.) as it emerges, Hampshire, UK, May.

Jack Perks / Common carp (Cyprinus carpio) swimming in a river, feeding on Zebra mussels (Dreissena polymorpha). The animal swims out of the frame. London, UK.

Jack Perks / Common barbel (Barbus barbus) appearing and feeding at the bottom of the river alongisde Common dace (Leuciscus leuciscus). The Barbel swims out of the frame. Nottinghamshire, UK.

Espen Bergersen / Four Herring gulls (Larus argentatus) in flight, one with remains of a Herring in its beak, being chased by the other three, Skjervoy, Troms, Norway, Norwegian Sea. October

Espen Bergersen / Fieldfare (Turdus pilaris) perched in Rowan (Sorbus aucuparia) tree, feeding on berries, Troms, Norway. October.

Espen Bergersen / Common starling (Sturnus vulgaris) perched in Rowan (Sorbus aucuparia) tree, feeding on berries, Troms, Norway. October. Cropped

Espen Bergersen / Moose (Alces alces) reaching head up to graze on Willow tree, Troms, Norway, March. Cropped.

Espen Bergersen / Moose (Alces alces) feeding on a tree, Troms, Norway. March.

Espen Bergersen / Ruff (Philomachus pugnax) male, watching its Mosquito (Culicidae) prey, Troms, Norway. June. Cropped

Andy Trowbridge / Eastern great egret (Ardea alba modesta) standing in shallow water with fish prey in beak, Lake McGregor, Canterbury, South Island, New Zealand.

Nigel Cattlin / Buff-tailed bumblebee (Bombus terrestris) gathering nectar from Spear thistle (Cirsium vulgare) flower with feeding Pollen beetles (Meligethes sp.), Berkshire, England, UK, July.

Mike Read / Eurasian otter (Lutra lutra) cub feeding on Velvet swimming crab (Necora puber) at the edge of Loch Linnhe, Kingairloch, Scotland, UK, May.

Mike Read / Eurasian otter (Lutra lutra) cub feeding on Velvet swimming crab (Necora puber) at the edge of Loch Linnhe, Kingairloch, Scotland, UK, May.

Heather Angel / Early bumblebee (Bombus pratorum) feeding on nectar from Water figwort (Scrophularia auriculata) flower, UK.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) female, sitting upright, alert, with infant feeding on grass close by, Norfolk, UK. June.

Nick Garbutt / Humpback whales (Megaptera novaeangliae) lunge feeding with flocks of Glaucous-winged gulls (Larus glaucescens) above, Sitka Sound, south east Alaska, USA. March

Nick Garbutt / Resplendent quetzal (Pharomachrus mocinno) male, perched on lichen covered branch with berry in beak, in montane rainforest, Talamanca, Costa Rica.

Bret Charman / Humpback whale (Megaptera novaeangliae) pod, bubble-net feeding at water surface, Tebenkof Bay, Alaska, USA. July.

Bret Charman / African wild dog (Lycaon pictus) dragging a dead Impala (Aepyceros melampus) from a shallow pool at the edge of the Luangwa River, South Luangwa National Park, Zambia.

Bret Charman / Chestnut-naped antpitta (Grallaria nuchalis) feeding from palm of a hand, Jardin, western Andes, Colombia.

Bret Charman / Red squirrel (Sciurus vulgaris) sitting on a low branch feeding, surrounded by Heather (Calluna vulgaris) in flower, Cairngorms National Park, Scotland, UK. August.

Bret Charman / Musk lorikeet (Glossopsitta concinna) perched in tree feeding on Eucalypt (Eucalyptus sp.) flowers, Murray River, South Australia.

Bret Charman / Atlantic puffin (Fratercula arctica) standing on clifftop with beak full of Sand eels (Ammodytes sp.), Skomer, Wales, UK. June.

Bret Charman / African elephant (Loxodonta africana) bull, reaching its trunk into tree canopy to feed on leaves of Sausage tree (Kigelia africana), Mana Pools National Park, Zimbabwe. Endangered.

Bret Charman / Humpback whale (Megaptera novaeangliae) pod bubble-net feeding at water surface, Frederick Sound, Alaska, USA, Pacific Ocean.

Bret Charman / Humpback whale (Megaptera novaeangliae) pod bubble-net feeding at water surface, Frederick Sound, Alaska, USA, Pacific Ocean.

Bret Charman / Atlantic puffin (Fratercula arctica) walking through bracken towards its burrow with beak full of fish, Skomer Island, Pembrokeshire, Wales, UK. May.

Bret Charman / Skomer vole (Clethrionomys glareolus skomerensis) feeding on grass, Skomer Island, Wales, UK. April.

Franco Banfi / Dugong (Dugong dugon) feeding on Seagrass (Halophila stipulacea) meadow accompanied by Golden trevally (Gnathanodon speciosus) juvenile, Marsa Alam, Egypt, Red Sea.

Suzi Eszterhas / A rescued Brush-tailed possum (Trichosurus vulpecula) albino, sitting on shoulder of wildlife sanctuary director, feeding, Bonorong Wildlife Sanctuary, Tasmania, Australia. October, 2015.

Suzi Eszterhas / Meerkat (Suricata suricatta) returning to burrow carrying insect prey in mouth, Makgadikgadi Pans, Botswana.

Suzi Eszterhas / Squirrel glider (Petaurus norfolcensis) orphan infant, aged 70 days, being hand fed fluids, Currumbin Wildlife Hospital, Queensland, Australia. October, 2015.

Suzi Eszterhas / Tawny frogmouth (Podargus strigoides) rescued after being hit by a car, being hand fed by wildlife sanctuary director, Bonorong Wildlife Sanctuary, Tasmania, Australia. October, 2015.

Suzi Eszterhas / Two Tawny frogmouths (Podargus strigoides) rescued after being hit by a car, being hand fed by wildlife sanctuary director, Bonorong Wildlife Sanctuary, Tasmania, Australia. October, 2015.

Suzi Eszterhas / Two Tawny frogmouths (Podargus strigoides) rescued after being hit by a car, being hand fed by wildlife sanctuary director, Bonorong Wildlife Sanctuary, Tasmania, Australia. October, 2015.

David Tipling / Great frigatebird (Fregata minor) in flight, harassing a Masked booby (Sula dactylatra) from below. The Masked booby releasing regurgitated fish to escape, Cosmoledo Atoll, Seychelles.

Neil Aldridge / Red lechwe (Kobus leche) herd with juveniles grazing in evening light. One animal walks into frame and then stands in the centre looking around. Spur-winged geese (Plectropterus gambensis) are amongst...

Neil Aldridge / Impala (Aepyceros Melampus) males and females standing side by side grazing and grooming each other in grassland, Okavango Delta, Botswana.

Neil Aldridge / Red lechwe (Kobus leche) male feeding on a grass stem. The animal walks out of frame. An Intermediate egret (Ardea intermedia) is feeding in the grass beside the Lechwe. Okavango Delta, Botswana.

Neil Aldridge / Yellow-billed oxpeckers (Buphagus africanus) entering frame and landing on young Impala (Aepyceros Melampus) male. The birds are feeding on insects on the Impala's body in midday heat. A herd of Burch...

David Tipling / Hedgehogs (Erinaceus europaeus) feeding from food bowl on garden patio, Holt, Norfolk, England, UK, July.

Konrad Wothe / Goldcrest (Regulus regulus) male attempting to feed fledgling perched in Spruce tree (Picea sp.) before leaving frame, Upper Bavaria, Germany, May.

Konrad Wothe / Sparrowhawk (Accipiter nisus) female eating House sparrow (Passer domesticus) whilst perched in tree, Baden-Wurttemberg, Germany.

Brian Bevan / Great crested grebe (Podiceps cristatus) pair attempt to feed feather to chick resting on one parent's back as the other preens, Bedfordshire UK, April.

Brian Bevan / Great crested grebe (Podiceps cristatus) pair attempt to feed fish to chick resting on one parent's back, Bedfordshire UK, April.

Brian Bevan / Great crested grebe (Podiceps cristatus) pair attempt to feed fish to chick resting on one parent's back, Bedfordshire UK, April.

Brian Bevan / Collared dove (Streptopelia decaocto) feeding chicks in nest in Palm tree (Arecaceae sp.), Bedfordshire, UK, June.

Brian Bevan / Close up of Collared dove (Streptopelia decaocto) feeding chicks at nest in Palm tree (Arecaceae sp.), Bedfordshire UK, June.

Harry Collins / Brown bear (Ursus arctos) mother and cub feeding on salmon. Cub pulls half of salmon apart and walks away, leaving frame. Second cub enters frame and walks towards mother, Katmai, Alaska, USA, August.

Harry Collins / Tracking shot of Common loon (Gavia immer) feeding chick small fish, Maine, USA, July.

Juan Carlos Munoz / Timelapse of Domestic cattle (Bos taurus) feeding on grassy mountainside, Collados del Ason Natural Park, Cantabria, Spain. July.

Neil Aldridge / Focus pull from Ostrich (Struthio camelus) females feeding to Chacma baboon (Papio ursinus) female suckling infant in grassland, Okavango Delta, Botswana, June.

Neil Aldridge / Focus pull from Chacma baboon (Papio ursinus) female suckling infant to Ostrich (Struthio camelus) females feeding in grassland. Two other baboons pass through centre of shot, Okavango Delta, Botswana...

Neil Aldridge / Tracking shot of Ostriches (Struthio camelus) feeding in grassland, Okavango Delta, Botswana.

Neil Aldridge / Ostrich (Struthio camelus) female foraging in grassland before walking away and leaving frame, Okavango Delta, Botswana.

Neil Aldridge / Tracking shot Chacma baboon (Papio ursinus) troop congregating beside feeding Ostrich (Struthio camelus) females in grassland, Okavango Delta, Botswana.

Marie Read / Black-capped chickadees (Poecile atricapilla) feeding from sunflower seedhead in snow, Freeville, New York, USA, February.

Nick Upton / Spotted flycatcher (Muscicapa striata) male with insect prey in beak, hovering above a begging female, offering food during courtship, Forest of Dean, Gloucestershire, UK. May.

Ewan Flynn / Atlantic canary (Serinus canaria) male, perched in bush feeding on sun dried seeds, Ponta de Sao Lourenco, Madeira. September.

Ewan Flynn / Atlantic canary (Serinus canaria) male, perched in bush feeding on sun dried seeds, Ponta de Sao Lourenco, Madeira. September.

Ewan Flynn / Atlantic canary (Serinus canaria) male, perched in bush feeding on sun dried seeds, Ponta de Sao Lourenco, Madeira. September.

Ewan Flynn / Atlantic canary (Serinus canaria) male, perching in bush covered in sun dried seeds, Ponta de Sao Lourenco, Madeira. September.

Joel Sartore / Photo Ark / Peruvian woolly monkey (Lagothrix cana) female juvenile, feeding, showing severe growth deformities due to poor nutrition after being reared as a pet, Cetas-IBAMA wildlife rehabilitation centre, Manau...

Roland Seitre / Chestnut-bellied pigeon (Ducula goliath) hanging upside down in tree, feeding on berries, Touaourou, New Caledonia.

Roland Seitre / Chestnut-bellied pigeon (Ducula goliath) hanging upside down in tree, feeding on berries, Touaourou, New Caledonia.

Roland Seitre / Chestnut-bellied pigeon (Ducula goliath) perched in tree feeding on berries, Touaourou, New Caledonia.

Roland Seitre / Black-naped fruit dove (Ptilinopus melanospilus) male, perched in tree feeding on fruit, Borneo.

Roland Seitre / Black-naped fruit dove (Ptilinopus melanospilus) male, perched in tree feeding on fruit, Borneo.

Roland Seitre / Orange-breasted green pigeon (Treron bicinctus) perched in tree feeding on fruit, Sri Lanka.

Roland Seitre / Cloven-feathered dove (Drepanoptila holosericea) perched in tree, feeding on fruit, Parc des Grandes Fougeres, Farino, New Caledonia.

Roland Seitre / White-capped fruit dove (Ptilinopus dupetithouarsii) perched in tree feeding on fruit, Ua Huka, Marquesas Archipelago, French Polynesia.

Roland Seitre / Two Green-naped pheasant pigeons (Otidiphaps nobilis nobilis) feeding, New Guinea. Captive.

Roland Seitre / Bartlett's bleeding heart dove (Gallicolumba crinigera) pair, feeding during courtship, Philippines. Captive.

Roland Seitre / Crested pigeon (Ocyphaps lophotes) flock foraging on dry ground, Alice Springs, Northern Territory, Australia.

Roland Seitre / Flock pigeon (Phaps histrionica) flock foraging on dry ground, Alice Springs, Northern Territory, Australia.

Doug Perrine / Hawaiian spinner dolphin (Stenella longirostris longirostris) pod, with male performing genital buzz courtship behaviour on female. A shoal of Black durgon triggerfish (Melichthys niger) swimming behi...

Steve Gettle / Sandhill Crane (Grus canadensis) parents foraging near chick and adopted Canada Goose (Branta canadensis) gosling, Kensington Metropark, Michigan