Tony Wu / Long-tailed tit (Aegithalos caudatus) perched on branch. Hokkaido, Japan. February.

Tony Wu / Long-tailed tit (Aegithalos caudatus) taking off from lichen covered branch. Hokkaido, Japan. February.

Tony Wu / Eurasian nuthatch (Sitta europaea amurensis) perched on hand, tame bird habituated to people. Hokkaido, Japan. March.

Tony Wu / Long-tailed tit (Aegithalos caudatus) defecating, perched on branch. Hokkaido, Japan. February.

Tony Wu / Long-tailed tit (Aegithalos caudatus) perched on branch. Hokkaido, Japan. February.

Danny Green / Goldfinch (Carduelis carduelis) perched on a branch, Scotland, UK, January.

Danny Green / Goldfinch (Carduelis carduelis) perched on a branch, Scotland, UK, January.

Danny Green / Cuckoo (Cuculus canorus) perched on a post. Thursley Common, Surrey, UK, May.

Danny Green / Cuckoo (Cuculus canorus) perched on a branch. Thursley Common, Surrey, UK, May.

Danny Green / Cuckoo (Cuculus canorus) perched on a post. Thursley Common, Surrey, UK, May.

Danny Green / Cuckoo (Cuculus canorus) perched on a branch. Thursley Common, Surrey, UK, May.

Danny Green / Black Grouse (Lyrurus tetrix) displaying. Norway, April.

Danny Green / Black Grouse (Lyrurus tetrix) displaying. Norway, April.

Danny Green / Black Grouse (Lyrurus tetrix) displaying. Norway, April.

Danny Green / Arctic Tern (Sterna paradisaea) in flight. Shetland Isles, Scotland, UK, June.

Danny Green / Osprey (Pandion haliaetus) Male landing at the nest with a fish. Finland, July.

Danny Green / Osprey (Pandion haliaetus) in flight catching a fish. Scotland, UK, August.

Danny Green / Grey Heron (Ardea cinerea) at night. Lincolnshire, UK, September.

Danny Green / Grey Heron (Ardea cinerea) at night. Lincolnshire, UK, September.

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Eurasian coot (Fulica atra) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Slavonian grebe (Podiceps auritus) Kyrkbosjon, Bromma, Stockholm, Sweden

Staffan Widstrand / Blackbird chicks (Turdus merula) in their nest in a bicycle basket, Jarfalla, Sweden

Staffan Widstrand / Blackbird chicks (Turdus merula) in their nest in a bicycle basket, Jarfalla, Sweden

Loic Poidevin / Black-headed gull (Chroicocephalus ridibundus) female and chicks foraging, Vendee, France.

Loic Poidevin / Western cattle egret (Bubulcus ibis) in flight, Marais de Brenne, France, June.

Loic Poidevin / Black-crowned night heron (Nycticorax nycticorax) in flight, Marais de Brenne, France, June.

Loic Poidevin / Purple heron (Ardea purpurea) in flight, Marais de Brenne, France, June.

Loic Poidevin / Pied avocet (Recurvirostra avosetta) in grass, Marais / Marsh Vendee , France, June.

Loic Poidevin / Northern shoveler (Spatula clypeata) mother and young, Marais / Marsh Vendee, France, June.

Loic Poidevin / Eurasian hoopoe (Upupa epops) foraging in grass, Vendee, France, May.

Loic Poidevin / Mute swan (Cygnus olor) Vendee, France, May.

Loic Poidevin / Pied avocet (Recurvirostra avocetta) Vendee, France, May.

Loic Poidevin / Pied avocet (Recurvirostra avocetta) with chick, Vendee, France, May.

Loic Poidevin / Long-eared owl (Asio otus) on a branch, Vendeen Marsh, Vendee ,France, August. Small repro only

Loic Poidevin / Common blackbird (Turdus merula) young female, Vendee, France, July

Loic Poidevin / Barn swallow (Hirundo rustica) feeding young, in flight, Vendee, France, July

Loic Poidevin / Western cattle egret (Bubulcus ibis) foraging in grass, Vendee, France, June

Loic Poidevin / Sandwich tern (Thalasseus sandvicensis) in flight with fish, Noirmoutier Island, Vendee, France, July. Small repro only

Loic Poidevin / Sandwich Tern (Thalasseus sandvicensis) Noirmoutier Island, Vendee, France, June

Loic Poidevin / Sandwich tern (Thalasseus sandvicensis) juvenile Noirmoutier Island, Vendee, France, June. Small repro only

Loic Poidevin / Sandwich tern (Thalasseus sandvicensis) Noirmoutier Island, Vendee, France, June. Small repro only

Konrad Wothe / Papuan boys with King of Saxony bird of paradise (Pteridophora alberti), killed with slingshot. Eastern Highlands, Papua New Guinea. 2019.

Konrad Wothe / Lawes's parotia (Parotia lawesii) male at display ground in forest. Papua New Guinea.

Konrad Wothe / Blue bird-of-paradise (Paradisaea rudolphi) female perched in Schefflera (Schefflera sp) tree. Papua New Guinea.

Konrad Wothe / Great cuckoo-dove (Reinwardtoena reinwardtii) perched in Schefflera (Schefflera sp) tree. Eastern highlands, Papua New Guinea.

Konrad Wothe / Lawes's parotia (Parotia lawesii) female perched on branch. Papua New Guinea.

Konrad Wothe / Pygmy eagle (Hieraaetus weiskei) perched on branch. Papua New Guinea.

Konrad Wothe / Papuan hornbill (Rhyticeros plicatus) pair perched in tree, male preening. Papua New Guinea.

Konrad Wothe / Papuan hornbill (Rhyticeros plicatus) male perched in tree. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male decorating bower at display site. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male perched on branch, material to decorate bower in beak. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male at bower. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male constructing bower at display site, material in beak. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) pair at bower. Papua New Guinea.

Konrad Wothe / Superb bird-of-paradise ( Lophorina superba) male displaying, perched on branch. Papua New Guinea.

Konrad Wothe / Lawes's parotia (Parotia lawesii) male displaying. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) bower in rainforest. Eastern Highlands, Papua New Guinea.

Konrad Wothe / Lawes's parotia (Parotia lawesii) male. Papua New Guinea.

Konrad Wothe / Lawes's parotia (Parotia lawesii) female perched on branch. Papua New Guinea.

Konrad Wothe / Bird-of-paradise (Astrapia sp), stuffed specimen for sale on market stall. Papua New Guinea. 2019.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) at nest. Papua New Guinea.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) pair at nest, one incubating. Papua New Guinea.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) on nest. Papua New Guinea.

Konrad Wothe / Superb bird-of-paradise (Lophorina superba) male displaying. Papua New Guinea.

Konrad Wothe / Stephanie's astrapia (Astrapia stephaniae) male perched in tree. Papua New Guinea.

Konrad Wothe / Slaty robin (Peneothello cyanus) perched on mossy tree trunk. Western Highlands, Papua New Guinea.

Konrad Wothe / Common smoky honeyeater (Melipotes fumigatus) perched in tree, in rainforest. Western Highlands, Papua New Guinea.

Konrad Wothe / Brown sicklebill (Epimachus meyeri) female perched in tree. Western Highlands, Papua New Guinea.

Jack Dykinga / Burrowing owl (Athene cunicularia) chick, approximately 3 weeks after leaving burrow, running to meet parent arriving with food. Marana, Sonoran Desert, Arizona, USA.

Jack Dykinga / Burrowing owl (Athene cunicularia) chicks, approximately 3 weeks after leaving burrow, running to meet parent arriving with food. Marana, Sonoran Desert, Arizona, USA.

Ernie Janes / RF - Pheasant (Phasianus colchicus) male in spring, Norfolk, England, UK, April. (This image may be licensed either as rights managed or royalty free.)

Oscar Dewhurst / Northern shoveler (Anas clypeata) drake in flight. London, England, UK. December.

Oscar Dewhurst / European herring gull (Larus argentatus) shakes its feathers mid-flight. London, England, UK. December.

Oscar Dewhurst / Canada goose (Branta canadensis) flock flying over reedbed with London in the background. London, England, UK. December

Oscar Dewhurst / European robin (Erithacus rubecula) singing. London. January.

Oscar Dewhurst / A domestic dog chases a common pochard (Aythya ferina) through the water, pursued by a pair of mute swans (Cygnus olor), with the dog's owner looking on from the path. Hyde Park, London. January

Oscar Dewhurst / Great cormorant (Phalacrocorax carbo) surfacing after a successful dive to hunt for fish. London. January

Oscar Dewhurst / Great cormorant (Phalacrocorax carbo) with fish prey. London. January

Oscar Dewhurst / Herring gull (Larus argentatus) first winter bird. London, UK. January

Oscar Dewhurst / Great cormorant (Phalacrocorax carbo) with beak open perched on a wooden post in Hyde Park, London, England, UK, January.

Oscar Dewhurst / Great cormorant (Phalacrocorax carbo) swimming in a shaft of sunlight in shaded water. London, England, UK, January.

Oscar Dewhurst / Eurasian hobby (Falco subbuteo) juvenile about to catch mating pair of common darters (Sympetrum striolatum). London, England, UK. September.

Oscar Dewhurst / Green woodpecker (Picus viridis) female feeding in short grass. London, England, UK. January.

Oscar Dewhurst / Black-headed gulls (Chroicocephalus ridibundus) chasing a predatory European herring gull (Larus argentatus) away from their breeding colony. Suffolk, UK. June.

Oscar Dewhurst / Eurasian hobby (Falco subbuteo) in flight. Suffolk, UK. May.

Oscar Dewhurst / Eurasian Hobby (Falco subbuteo), diving to catch dragonflies over reedbed. Suffolk, May.

Oscar Dewhurst / Western marsh harrier (Circus aeruginosus) male hunting over reedbed, backlit at sunset. Suffolk, UK. May.

Oscar Dewhurst / Western marsh harrier (Circus aeruginosus) male hunting over reedbed. Suffolk, UK. May.

Oscar Dewhurst / Common swift (Apus apus) in flight. Suffolk, UK. May.

Oscar Dewhurst / Eurasian hobby (Falco subbuteo) feeding on a dragonfly whilst in flight. London, UK. September.

Oscar Dewhurst / Eurasian hobby (Falco subbuteo) feeding on a dragonfly whilst in flight. London, UK. September.