Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopos minor)perched on branch in snow, Kuusamo, Finland, January

Michel Poinsignon / Black Woodpecker (Dryocopus martius) flying from nest-hole in tree, Vosges Mountains, France. Veolia Environnement Wildlife Photographer of the Year 2009: Nature in Black and White category: Runner-up...

Juan Manuel Borrero / Illustration of silhouettes of the Pyrenean animals, Roe deer (Capreolus capreolus), Red deer (Cervus elaphus), Pyrenean chamois (Rupicapra pyrenaica), Red squirrel (Sciurus vulgaris), Red fox (Vulpes...

Juan Manuel Borrero / Illustration of threatened species of birds of Spain. Iberian Guillemot (Uria aalge ibericus), Cantabrian capercallie (Tetrao urogallus cantabricus), White backed woodpecker (Dendrocopos leucotos), Be...

Marie Read / White-headed Woodpecker (Picoides albolarvatus), male outside its nest hole with beak full of insects to feed young. June Lake, California, USA, June.

MYN / Brady Beck / Red-cockaded Woodpecker (Picoides borealis) feeding on tree trunk, endangered species, Richmond County, North Carolina, USA, May, meetyourneighboursproject.net

Grzegorz Lesniewski / White-backed Woodpecker (Dendrocopos leucotos). Bieszczady National Park, the Carpathians, Poland, February.

Wild Wonders of Europe / Lesniewski / White-backed Woodpecker (Dendrocopos leucotos). Bieszczady, Carpathian Mountains, Poland, February.

Wild Wonders of Europe / Lesniewski / White-backed Woodpecker (Dendrocopos leucotos). Bieszczady, Carpathian Mountains, Poland, February.

Axel Gomille / White-bellied Woodpecker (Dryocopus javensis), male (below) and female. Western Ghats, South India.

Michel Poinsignon / Great spotted woodpecker (Dendrocopos major) on branch, Lorraine, France, February

Gerrit Vyn / White-headed Woodpecker (Picoides albolarvatus) male on trunk of tree, Yakima County, Washington, USA, May.

Colin Varndell / Adult male Great spotted woodpecker (Dendrocopus major) Dorset, UK, March

Aflo / White backed woodpecker {Dendrocopos leucotos} Japan.

Peter Cairns / naturepl.com / Great-spotted woodpecker {Dendrocopos major} in winter forest, Cairngorms, Scotland, UK

Tom Vezo / Lewis's Woodpecker (Melanerpes lewis) peeking out of nest hole, White Mountains, Arizona

Tom Vezo / Lewis's Woodpecker (Melanerpes lewis) at nest with food, White Mountains, Arizona

Tom Vezo / Lewis's Woodpecker (Melanerpes lewis) portrait, White Mountains, Arizona

Tom Vezo / Lewis's Woodpecker (Melanerpes lewis) perched on a tree, White Mountains, Arizona

Yuri Shibnev / White backed woodpecker {Dendrocopos leucotos} at nest hole, South Primorskiy, Ussuriland, Far East Russia

Pete Oxford / White woodpecker (Melanerpes candidus) at nest hole, Pantanal. Brazil

Pete Oxford / White woodpeckers feed at bird table {Melanerpes candidus} Cerrado, Piaui, Brazil

Pete Oxford / White woodpecker {Melanerpes candidus} Cerrado, Piaui state, Brazil.

Pete Oxford / White Woodpecker (Melanerpes candidus) pair on tree trunk, South America

Michael Quinton / Hairy Woodpecker (Picoides villosus) with white bark pine nut in beak, North America

Yuri Shibnev / White backed woodpecker (Dendrocopos leucotos) at nest hole Russia Ussuriland, South Primorskiy Region. Clearing wood chippings from nest entrance