Andy Sands / Yellowhammer (Emberiza citrinella) perched on tree stump in snow, Hertfordshire, England, UK.

Andy Sands / Yellowhammer (Emberiza citrinella) perched with feathers puffed out on cold winter morning, Hertfordshire, England, UK.

Laurie Campbell / Male Yellowhammer (Emberiza citrinella) perched in Beech hedge, Berwickshire, Scotland, UK, January

Wild Wonders of Europe / Varesvuo / Yellowhammer (Emberiza citrinellus) male at water, Pusztaszer, Hungary, May 2008

Colin Varndell / Male Yellowhammer {Emberiza citrinella} UK.

Dietmar Nill / Portrait of Yellowhammer perched amongst blossom {Emberiza citrinella}

Mike Wilkes / Portrait, Yellowhammer on perch. UK

Mike Wilkes / Yellowhammer (Emberiza citrinella) male. UK, Europe

Ernie Janes / Yellow hammer (Emberiza citinella) on Elder tree, England, UK. May.

Ernie Janes / Yellow hammer (Emberiza citinella) flying sequence, England, UK. Digital composite.

Paul Hobson / Yellow bunting (Emberiza citrinella) male singing, perched on Hawthorn (Crataegus monogyna) branch. Sheffield, England, UK. April.

Paul Hobson / Yellow bunting (Emberiza citrinella) male singing, perched in Hawthorn (Crataegus monogyna) tree. Sheffield, England, UK. April.