Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) on bullrush, Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor)perched on snowy branch, Kuusamo, Finland January. Fascinating birds bookplate.

David Noton / The village of Eus perched on a hilltop with sunlight with the Pic de Canigou beyond, the Pyrenees, Languedoc-Rousillon, France. June 2006.

Markus Varesvuo / Black woodpecker (Dryocopus martius) hammering tree trunk, Posio, Finland, January

Andy Sands / Green Woodpecker (Picus viridis) male looking alert among fallen apples in snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male among wind-fallen apples. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male foraging on wind-fallen apples, calling in aggression display to deter other birds. Hertfordshire, England, UK, February.

Sven Zacek / Tail of a Pine Marten (Martes martes) sticking out from a black woodpecker hole as it forages for eggs and chicks. Estonia, Europe, May.

Lassi Rautiainen / Black woodpecker (Dryocopus martius) male feeding on tree trunk with beak open showing tongue, Finland, March

Claudio Contreras / Macaya breast-spot landfrog (Eleutherodactylus thorectes), critically endangered, Pic Macaya National Park, Massif de la Hotte, Haiti, October

Claudio Contreras / Cloud forest, Pic Macaya National Park, Massif de la Hotte, Haiti, October 2010

Claudio Contreras / Hispaniolan montane racerlet (Ialtris haetianus), Pic Macaya National Park, Massif de la Hotte, Haiti, October

Claudio Contreras / Hispaniolan montane racerlet (Ialtris haetianus), Pic Macaya National Park, Massif de la Hotte, Haiti, October

Claudio Contreras / La Hotte landfrog (Eleutherodactylus bakeri), critically endangered, Pic Macaya National Park, Massif de la Hotte, Haiti, October

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

Colin Varndell / Great spotted woodpecker (Dendrocopos major) female drumming on tree branch in winter, Dorset, UK January

Mike Wilkes / Great spotted woodpecker (Dendrocopos major) pecking at bark, searching for bugs under the bark, Warwickshire, UK

Marie Read / Acorn Woodpecker (Melanerpes formicivorus), male at granary tree showing many acorns stored for winter survival, Orange County, California, USA

Mike Read / Male Great spotted woodpecker (Dendrocopos major) on branch, near Ringwood, Hampshire, England, February

Poinsignon and Hackel / Sillhouette of Black woodpecker {Dryocopus martius} flying from nest hole in tree trunk in mist / rain, ancient forest, Vosges mountains, Lorraine, France. Overall winner and winner of the Birds categ...

Michel Poinsignon / Green woodpecker {Picus viridis} male at nest hole, Lorraine, France

Wild Wonders of Europe / Wothe / Great spotted woodpecker (Dendrocopos major) feeding chick at nest hole, deciduous forest in the Vihorlat Mountains near Michalovce, Western Carpathians, Eastern Slovakia, Europe, May 2009

Wild Wonders of Europe / Wothe / Young Great spotted woodpecker (Dendrocopos major) looking out of hole, deciduous forest in the Vihorlat Mountains near Michalovce, Western Carpathians, Eastern Slovakia, Europe, May 2009

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...

Wild Wonders of Europe / Zacek / Black woodpecker (Dryocopus martius) head profile on tree trunk, Korouma, Posio, Finland, February 2009 WWE BOOK. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Zacek / Black woodpecker (Dryocopos martius) on tree trunk, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Two Great spotted woodpeckers (Dendrocopos major) on tree trunks, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Black woodpecker (Dryocopos martius) on dead tree trunk, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Great spotted woodpecker (Dendrocopos major) on dead tree trunk, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Black woodpecker (Dryocopus martius) on tree trunk, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Black woodpecker (Dryocopus martius) pecking at tree trunk, Korouma, Posio, Finland, February 2009

Wild Wonders of Europe / Zacek / Male Great spotted woodpecker (Dendrocopos major) in snow, Posio, Korouma, Finland, February 2009

Chris O'Reilly / Female Great spotted woodpecker (Dendrocopus major) perched on a lichen covered branch, Cairngorm NP, Scotland, UK, winter

Niall Benvie / Black woodpecker (Dryocopus martius), in boreal forest, near Posio, Finland.

Wild Wonders of Europe / Varesvuo / Black Woodpecker (Dryocopus martius) Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Black Woodpecker (Dryocopus martius) at water, Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Great Spotted Woodpecker (Dendrocopus major) at water, Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Black Woodpecker (Dryocopus martius) drinking, Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Black Woodpecker (Dryocopus martius) Pusztaszer, Hungary, May 2008

Jose B. Ruiz / Green woodpecker (Picus viridis) drinking, Alicante, Spain

Jose B. Ruiz / Green woodpecker (Picus viridis) drinking, Alicante, Spain

Kim Taylor / Green Woodpecker (Picus viridis) male flying through Beech woodland in spring, Surrey, UK. Digital composite

Kim Taylor / Green Woodpecker (Picus viridis) using its tongue to extract a beetle larva from hole in Birch trunk. Digital composite, Surrey, UK

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female, Madera Canyon, Arizona

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female bringing food to nest cavity, Madera Canyon, Arizona

Mike Wilkes / Great spotted woodpecker {Dendrocopos major} female, Warwickshire, UK.

Pete Cairns / Great spotted woodpecker (Dendrocopus major) in winter, Cairngorms NP, Scotland, UK

Rolf Nussbaumer / Acorn woodpecker {Melanerpes formicovus} Male, Madera Canyon, Arizona, USA.

Mike Wilkes / Green Woodpeckers feeding young at nest in tree, UK

Rolf Nussbaumer / Gilded flicker, male on saguaro cactus {Colaptes chrysoides} Arizona, USA

Yva Momatiuk & John Eastcott / Gila Woodpecker (Melanerpes uropygialis) nesting in Saguaro (Carnegiea gigantea) in desert, spring, Sonoran Desert National Monument, Arizona

WILLIAM OSBORN / Green woodpecker (Picus viridis) at nest hole. UK, England

David Kjaer / Lesser spotted woodpecker (Dendrocopos minor) male with food at nest entrance, Sussex UK

Mike Wilkes / Green Woodpecker feeding young at nest in tree, England, UK

Mike Wilkes / Green Woodpecker feeding young at nest in tree, England, UK

Hermann Brehm / Black Woodpecker (Dryocopus martius) pair at nest hole, left female, right male, Germany, March

Hermann Brehm / Black Woodpecker (Dryocopus martius) pair at nest hole, female on left, male on right, Germany, March

Hermann Brehm / Green Woodpecker (Picus viridis) female on tree trunk, Germany

Hermann Brehm / Green Woodpecker (Picus viridis) female on tree trunk and with Red Squirrel (Red squirrel) emerging from hole in the tree, Germany, April

Hermann Brehm / Green Woodpecker (Picus viridis) juvenile, Germany

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...

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) scratching head against reed, Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopus minor) Uto Finland October

Markus Varesvuo / Lesser Spotted Woodpecker (Dendrocopos minor) male drumming on snowy tree trunk, Kotka, Finland, January. Fascinating birds bookplate.

Marie Read / Red-bellied Woodpecker (Melanerpes carolinus) pair, male calling, female in background, both clinging to treetrunk where their nest is located (not visible), Lakeland, Florida, USA, March.

Marie Read / Pileated Woodpeckers (Dryocopus pileatus), pair during incubation exchange, female clinging to treetrunk as male comes out of nest hole entrance, spring, New York, USA, May.

Claudio Contreras / Acorn woodpecker (Melanerpes formicivorus) at acorn-storing site, Los Ojos Ranch, Sonora, northwestern Mexico, February.

Loic Poidevin / Green woodpecker (Picus viridis) parent feeding chicks at nest in tree, West France, June

Donald M. Jones / Pileated Woodpecker (Dryocopus pileatus) mother with chicks in nest cavity, Troy, Montana

Donald M. Jones / Pileated Woodpecker (Dryocopus pileatus) mother feeding chick in nest cavity, Troy, Montana

Donald M. Jones / Pileated Woodpecker (Dryocopus pileatus) chicks in nest cavity, Troy, Montana

Donald M. Jones / Pileated Woodpecker (Dryocopus pileatus) female, Troy, Montana

Philippe Clement / The Pic du Midi d'Ossau (2,884 m), a mountain in the Pyrenees-Atlantiques, Pyrenees, France, June 2012

Philippe Clement / The Pic du Midi d'Ossau (2,884 m), a mountain in the Pyrenees-Atlantiques, Pyrenees, France, June 2012

Konrad Wothe / Acorn woodpecker (Melanerpes formicivorus striatipectus) Costa Rica

Markus Varesvuo / Lesser spotted woodpecker (Dendrocopus minor) feeding on tree trunk, Kotka, Finland, January, digital removal of a branch

Andy Sands / Green Woodpecker (Picus viridis) male on snow, calling. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female looking for apples in snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male on snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female feeding on apple she has uncovered from snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female feeding on fallen apple on snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male perched on trunk of an apple tree. Hertfordshire, England, UK, October.

Andy Sands / Green Woodpecker (Picus viridis) male in alert posture among apples on ground. Hertfordshire, England, UK, October.

Andy Sands / Green Woodpecker (Picus viridis) male in snow with apple. The ants on his beak are from a previous attack on an ant nest. Hertfordshire, England, UK. February.

Andy Sands / Green Woodpecker (Picus viridis) female foraging for fallen apples in snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female preening on apple tree trunk. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female preening on apple tree trunk. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female foraging for fallen apples in snow. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male among wind-fallen apples. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) female preening on apple tree trunk. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male feeding on wind-fallen apples. Hertfordshire, England, UK, February.

Andy Sands / Green Woodpecker (Picus viridis) male in alert posture among fallen apples. Hertfordshire, England, UK, December.