Guy Edwardes / Blue tit (Cyanistes caeruleus) in flight. Slovenia. February.

Philippe Clement / Blue tit (Cyanistes caeruleus) collecting cotton wool for nest building before flying out of frame, Belgium, April.

Andres M. Dominguez / Blue tit (Cyanistes caeruleus) Sierra de Grazalema Natural Park. Southern Spain. July

Andres M. Dominguez / Blue Tit (Cyanistes caeruleus) eating Hawthorn berries, Sierra de Grazalema Natural Park, southern Spain, December.

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

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

Dave Bevan / Bank vole (Myodes glareolus) feeding from a bird feeder anlongside a Coal tit (Periparus ater) and Blue tit (Cyanistes caeruleus), Carmarthenshire, Wales, UK, September.

Klein & Hubert / Blue tit (Cyanistes caeruleus) on flowering Forsythia branch in spring, France

Dave Bevan / Slow motion clip of a Blue tit (Cyanistes caeruleus) flying to nest box, enters to feed nestlings and leaves, Carmarthenshire, Wales, UK, June.

Stephen Dalton / Great tit (Parus major) and Blue tit (Cyanistes caeruleus) squabbling on flower pots, Sussex, UK December

Dave Bevan / Blue tit (Cyanistes caeruleus) perched on a tree stump, Carmarthenshire, Wales, UK, November.

Ernie Janes / Blue tit (Cyanistes caeruleus) hanging on Pussy willow branch, Norfolk, England, UK, April.

Pal Hermansen / Silhouette of a Blue tit (Cyanistes / Parus caeruleus) seen through the windscreen of an old car, Bastnas, Sweden, December. Winner of the Fritz Polking Prize at the GDT competition 2013 and winner of...

Pål Hermansen,Pal Hermansen / Blue tit (Cyanistes caeruleus) with food in its beak at the entrance to its nest in the exhaust pipe of an old car, Bastnas, Sweden, June. Winner of the Fritz Polking Prize at the GDT competition 2013...

Pal Hermansen / Blue tit (Cyanistes caeruleus) taking off in the snow, with old cars in the background, Bastnas, Sweden, February. Winner of the Fritz Polking Prize at the GDT competition 2013 and winner of the Portf...

Sven Zacek / Blue tit (Parus caeruleus) perched on a frosty tree, Southern Estonia, January.

Andy Rouse / 2020VISION / Blue Tit (Cyanistes / Parus caeruleus) perched on lichen-covered twig. Wales, UK, February. Did you know? The front of a Blue tit's head glows brightly under UV light, which is used by females to choo...

Andy Rouse / 2020VISION / Blue Tit (Cyanistes / Parus caeruleus) perched on lichen-covered twig. Wales, UK, February.

Andy Rouse / Blue Tit (Cyanistes caeruleus) perched on snow covered Fir tree (Abies) branch, in a garden, Wales, UK December

Andy Rouse / Blue Tit (Cyanistes caeruleus) perched on snow covered Fir tree (Abies) branch, in a garden, Wales, UK December

Andy Rouse / Blue Tit (Cyanistes caeruleus) perched on snow covered Fir tree (Abies) branch, in a garden, Wales, UK December

Konrad Wothe / Blue Tit (Cyanistes caeruleus) parent delivering caterpillar to chicks in nest, Europe

NaturePL Showreels / Showreel (or snowreel!) featuring wintery landscapes and animals adapting to cold weather around the world.

Fabrice Cahez / Eurasian Blue Tit (Cyanistes caeruleus) hanging from twig, France, January.

Oscar Dewhurst / Blue tit (Cyanistes caeruleus) perched on lichen-covered branch. Yorkshire, UK. April.

Philippe Clement / Blue tit (Parus caeruleus) collecting dry moss and cotton wool as nest building material in spring, Belgium. April.

Brian Bevan / Blue tit (Cyanistes caeruleus) feeding amongst flowers of cherry tree, Bedfordshire, UK, April.

Neil Challis / Blue tit (Cyanistes caeruleus) feeding on Elderberries (Sambucus), whilst checking for predators, Ashridge, Hertfordshire, August.

Neil Challis / Blue tit (Cyanistes caeruleus) feeding on Elderberries (Sambucus), Ashridge, Hertfordshire, August.

Neil Challis / Blue tit (Cyanistes caeruleus) feeding on Elderberries (Sambucus), Ashridge, Hertfordshire, August.

Neil Challis / Blue tit (Cyanistes caeruleus) feeding on Elderberries (Sambucus), Ashridge, Hertfordshire, August.

Bernard Castelein / Blue tit (Parus caeruleus) chick bathing, adults in background. Brasschaat, Belgium. June.

Bernard Castelein / Blue tit (Parus caeruleus) chick bathing. Brasschaat, Belgium. June.

Guy Edwardes / Blue tit (Cyanistes caeruleus) in flight. Slovenia. February.

Guy Edwardes / Blue tit (Cyanistes caeruleus) in flight. Slovenia. February.

Guy Edwardes / Blue tit (Cyanistes caeruleus) in flight. Slovenia. February.

Guy Edwardes / Blue tit (Cyanistes caeruleus) flying towards camera. Slovenia. February.

Nick Upton / Blue tit (Parus caeruleus) perched on a Crab apple (Malus sylvestris) tree branch in garden, Wiltshire, UK, April.

Nick Upton / Blue tit (Parus caeruleus) perched on a Crab apple (Malus sylvestris) tree branch in a garden, fluffing up its feathers to keep warm late in the day, Wiltshire, UK, March.

Philippe Clement / Blue tit (Cyanistes caeruleus) collecting dry moss and animal hair from a bowl to use for nest building, Belgium, April.

Hanne & Jens Eriksen / Eurasian blue tit (Parus caeruleus) fluffed up and perched on twig, Denmark, March

Erlend Haarberg / European Blue tit (Cyanistes caeruleus), Nordherad, Norway, October.

Erlend Haarberg / European Blue tit (Cyanistes caeruleus), Nordherad, Norway, October.

Guy Edwardes / Blue tit (Cyanistes caeruleus) in flight, Slovenia, February.

David Tipling / Blue tit (Cyanistes caeruleus) feeding young in nest box in garden, Norfolk, England, UK, May.

David Tipling / Blue tit (Cyanistes caeruleus) feeding young in nest box in garden, Norfolk, England, UK, May.

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

Melvin Grey / Blue tit (Cyanistes caeruleus), two feeding on fat ball, one leucistic. Carmarthenshire, Wales, UK. August.