Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider (Misumena vatia) prey to nest, Monmouthshire Wales, UK, May.

Andres M. Dominguez / Hawfinch (Coccothraustes coccothraustes) perched on branch amongst Hawthorn (Crataegus sp) berries. Sierra de Grazalema Natural Park, Cadiz, Spain. February.

SCOTLAND: The Big Picture / Crested tit (Lophophanes cristatus) perched above pine forest with a series of small lochans in background, Cairngorms National Park, Scotland, UK, December 2014.

Loic Poidevin / Northern ravens (Corvus corax) interacting in snow, Leon, Spain, February.

Loic Poidevin / Eurasian bullfinch (Pyrrhula pyrrhula) male on a branch feeding on Rowan (Sorbus aucuparia) berries, Leon, Spain, February.

Loic Poidevin / Eurasian bullfinch (Pyrrhula pyrrhula) male on a branch feeding on Rowan (Sorbus aucuparia) berries, Leon, Spain, February.

Loic Poidevin / Eurasian blue tit (Cyanistes caeruleus) on a branch, Vendee, France, January.

John Shaw / Yellow warbler (Setophaga petechia aureola) on lava rocks. Isabela Island, Galapagos. May.

Andy Rouse / Espanola mockingbird, (Mimus macdonaldi), on beach, Galapagos

Andy Rouse / Black headed bunting, (Emberiza melanocephala), catching flies on sunflower crop, Bulgaria, June.

Andy Rouse / Stonechat, (Saxicola rubicola) male shaking head, blurred motion. UK

Jack Dykinga / Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Jack Dykinga / Murmuration of Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) at sunset, before roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

SCOTLAND: The Big Picture / Crested tit (Parus cristatus) backlit on lichen-covered branch, Inshriach Forest, Scotland, UK, January.January

Bernard Castelein / Yellow-rumped cacique (Cacicus cela) calling, Madidi NP, Bolivia

Steven David Miller / Olive-backed sunbird (Nectarinia jugularis) female returning to her nest with nesting material, Cape Hillsborough National Park, Queensland, Australia, September.

Steven David Miller / Olive-backed Sunbird (Nectarinia jugularis) female in her nest, Cape Hillsborough National Park, Queensland, Australia, September.

Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male displaying in cattail marsh, Viera Wetlands, Brevard County, Florida, USA, January.

Marie Read / Snow buntings (Plectrophenax nivalis) flock in flight during a snowstorm, New York, USA, January.

Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.

Marie Read / Loggerhead shrike (Lanius ludovicianus) on an ice-covered fence after an ice storm, Anahuac National Wildlife Refuge, Texas, USA. January.

Marie Read / Northern cardinal (Cardinalis cardinalis) male perched amid snow-covered branches, New York, USA, February.

Marie Read / Common redpoll (Carduelis flammea), male perched in alder (Alnus rugosa) during a snowstorm in winter, New York, USA, January.

Marie Read / Eastern bluebird (Sialia sialis) male fluttering wings while perched on cherry (Prunus sp.) branch in spring, New York, USA, April.

Marie Read / Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May.

Marie Read / American Robin (Turdus migratorius), feeding on winterberry (Ilex) fruits in winter, New York, USA, December.

Ernie Janes / House sparrow (Passer domesticus) in building, Scottish borders, UK, July.

Ernie Janes / Goldfinch (Carduelis carduelis) feeding on thistle flowers, England

David Gallan / Cameratrap video of a male Superb lyrebird (Menura novaehollandiae) courting female on display mound, Australia, July.

David Gallan / Male Satin bowerbird (Ptilonorhynchus violaceus) courting female on suburban street verge, bower filled with blue plastic, Australia, October 2018.

Markus Varesvuo / Jay (Garrulus glandarius), two fighting in mid-air with another observing. Norway. October.

Markus Varesvuo / Jay (Garrulus glandarius), two fighting in mid-air with another observing. Norway. October.

Markus Varesvuo / Citrine wagtail (Motacilla citreola) male perched on Reed. Latvia. April.

John Waters / Large group of Pied wagtails (Motacilla alba) roosting in a Plane tree (Platanus hispanica), Bath, England, UK, January.

John Waters / Large murmuration of Common starlings (Sturnus vulgaris) swirling over reedbed roost at sunset, Ham Wall RSPB Reserve, Somerset, England, UK, January.

John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.

John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.

Jed Weingarten / Wild Wonders of China / Mrs Gould's sunbird (Aethopyga gouldiae) perched on branch, Tangjiahe Nature Reserve, Sichuan Province, China.

Pedro Narra / Barn Swallow (Hirundo rustica) in flight. Portugal, Europe

Paul Hobson / Wood warbler (Phylloscopus sibilatrix) singing whilst perched on branch, silhouetted at dawn. Sheffield, England, UK. May.

Brian Bevan / Long tailed tit (Aegithalos caudates) nest building, Bedfordshire, England, UK, April.

Ann & Steve Toon / Malachite sunbird (Nectarinia famosa) feding at flower, Kirstenbosch National Botanical Garden, Cape Town, South Africa, September

Ann & Steve Toon / Orange-breasted sunbird (Anthobaphes violacea), Kirstenbosch National Botanical Garden, Cape Town, South Africa, September

Hermann Brehm / Blackcap (Sylviya atricapilla) male perched in blossom, Hungary, April.

Steven David Miller / Great bowerbird (Chlamydera nuchalis), male showing off treasures whilst female inspects bower. Lake Argyle, Kununurra, Western Australia.

Hermann Brehm / Nightingale (Luscinia megarhynchos ) singing, Germany, April.

Kerstin Hinze / Red crossbill (Loxia curvirostra) feeding from a spruce cone, Bavarian Forest National Park, Germany, October.

Kim Taylor / Slow motion clip of a male Common blackbird (Turdus merula) bathing in a birdbath, Surrey, England, UK, October.

Kerstin Hinze / Dipper (Cinclus cinclus) foraging in a stream, Harz National Park, Saxony-Anhalt, Germany, March.

Philippe Clement / Territorial Common raven (Corvus corax) on cliff top, tearing out vegetation, Eshaness, Northmavine, Shetland Islands, Scotland, UK, May.

Philippe Clement / Common raven (Corvus corax) taking off from the top of a sea cliff, Eshaness, Northmavine, Shetland Islands, Scotland, UK, May.

Philippe Clement / Common raven (Corvus corax) calling from top of sea cliff, Eshaness, Northmavine, Shetland Islands, Scotland, UK, May.

Philippe Clement / European dipper (Cinclus cinclus) perched on rock in stream and looking around, Luxembourg, April.

Philippe Clement / European dipper (Cinclus cinclus) perched on a rock at the base of a waterfall and bobbing, Luxembourg, April.

Dave Bevan / Pair of Sand martins (Riparia riparia) feeding chicks, Carmarthenshire, Wales, UK, July.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / Female Chaffinch (Fringilla coelebs) bringing moss to nest and incorporating it into nest before flying out of frame, Carmarthenshire, Wales, UK, May.

Dave Bevan / Female Chaffinch (Fringilla coelebs) shaping nest with her body and wings, Carmarthenshire, Wales, UK, May.

Dave Bevan / Male Pied flycatcher (Ficedula hypoleuca) calling to establish territory and attract a mate, Carmarthenshire, Wales, UK, May.

David Tipling / Fieldfare (Turdus pilaris) in garden in freezing weather with snow on the ground Norfolk, England, UK. february

David Tipling / Eurasian magpies (Pica pica) five gathering prior to going to roost Hortobagy National Park, Hungary January

Hermann Brehm / Coal Tit (Parus ater) with food for the chicks, Germany. April

Hermann Brehm / Coal Tit (Parus ater) by pond, Germany. April

Hermann Brehm / Coal Tit (Parus ater) with food for the chicks Germany. November

Hermann Brehm / Middle spotted Woodpecker (Dendrocopus medius) and Jay (Garrulus glandarius), Germany. October

Hermann Brehm / Starling (Sturnus vulgaris) at the nesthole, Germany. June

Hermann Brehm / Starling (Sturnus vulgaris) feeding young at the nesthole, Germany. May

Peter Lewis / Starling (Sturnus vulgaris) coming into roost at sunset, Brighton, Sussex, England, UK, December.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at Studland, Dorset, England, UK, January.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at Studland, Dorset, England, UK, January.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at Studland, Dorset, England, UK, January.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at sunset, West Pier, Brighton, England, UK.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at sunset, West Pier, Brighton, England, UK.

Peter Lewis / Starling (Sturnus vulgaris) murmuration at sunset, West Pier, Brighton, England, UK.

Peter Lewis / Redstart (Phoenicurus phoenicurus) male, Surrey, England, UK. June.

Peter Lewis / Stonechat (Saxicola torquata) Surrey, England, UK.

Bernard Castelein / Barn swallow (Hirundo rustica) two juveniles, one in flight, the other resting on roof. Klein Schietveld, Brasschaat, Belgium. August.

Bernard Castelein / Barn swallow (Hirundo rustica) juvenile perched on barbed wire. Klein Schietveld, Brasschaat, Belgium. August.

Bernard Castelein / Barn Swallow; (Hirundo rustica), juvenile, Klein Schietveld, Brasschaat, Belgium. August.

John Cancalosi / House finch (Haemorhous mexicanus), two females on Sotol (Dasylirion wheeleri). Sonoran desert, Arizona, USA. July.

Oscar Dewhurst / Red-vented bulbul (Pycnonotus cafer) perched on rock. Karnataka, India.

Oscar Dewhurst / Long-billed sunbird (Cinnyris lotenius) nectaring on flowers. Goa, India. September.

Oscar Dewhurst / Velvet-fronted nuthatch (Sitta frontalis) on tree trunk. Goa, India.

Oscar Dewhurst / Bonnet macaque (Acridotheres tristis) infant eating biscuits provided by humans. Hampi, Karnataka, India.

Oscar Dewhurst / Bonnet macaque (Acridotheres tristis) walking along wall of temple. Hampi, Karnataka, India.

Oscar Dewhurst / Mountain bluebird (Sialia currucoides). Yellowstone National Park, Wyoming, USA. September.

Oscar Dewhurst / Steller's jay (Cyanocitta stelleri) perched on branch. Grand Teton National Park, Wyoming, USA. September.

Oscar Dewhurst / Clark's nutcracker (Nucifraga columbiana) feeding on Pine (Pinus sp) seeds. Grand Teton National Park, Wyoming, USA. September.

Hanne & Jens Eriksen / Common starling (Sturnus vulgaris) with food in beak, on lawn, Sweden. May.

Hanne & Jens Eriksen / Brambling (Fringilla montifringilla) male standing on ground. Norway, May.

Hanne & Jens Eriksen / Black-billed magpie (Pica hudsonia) in flight. Colorado, USA, August.

Hanne & Jens Eriksen / Tawny pipit (Anthus campestris) standing on ground. Oman, March.

Hanne & Jens Eriksen / Great tit (Parus major) perched in tree with fluffed up feathers. Denmark, February.

Hanne & Jens Eriksen / Eurasian blue tit (Cyanistes caeruleus) perched in tree amongst catkins. Denmark, February.

Hanne & Jens Eriksen / Corn bunting (Emberiza calandra) singing, perched on branch. Denmark, May.