Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub playing with mother, Katmai National Park, Alaska, USA, August

Dietmar Nill / Brambling (Fringilla montifringilla) male. Germany, Europe

Dietmar Nill / Brambling (Fringilla montifringilla) on birdtable in snow. Germany, Europe

Juan Carlos Munoz / Huge flock of Bramblings (Fringilla montifringilla) flying to roost in trees, Gorbeia Natural Park, Basque country, Spain, January 2011, unusual winter visitors pushed further south than usual by the...

David Kjaer / Flock of Bramblings {Fringilla montifringilla} perched in Beech tree in winter, Wiltshire, UK

David Kjaer / Large flock of Bramblings {Fringilla montifringilla} feeding on Beech mast / seeds, Wiltshire, UK

Ingo Arndt / Brambling (Fringilla montifringilla) flock arriving at sleeping place while overwintering, Steiermark, Austria

Ingo Arndt / Brambling (Fringilla montifringilla) flock, four million, returning to sleeping place during overwintering in Black Forest, Germany

Ingo Arndt / Brambling (Fringilla montifringilla) flock arriving at sleeping place while overwintering, Steiermark, Austria

Mike Read / Brambling {Fringilla montifringilla} male in garden feeding on frosty lawn, Ringwood, Hampshire, UK, January

Nature Production / Brambling {Fringilla montifringilla} perched on frosted branch, Nagano, Japan, February

Mike Read / Brambling female in hazel tree {Fringilla montifringilla} Hampshire UK