Grzegorz Lesniewski / Red-breasted Flycatcher (Ficedula parva) perched. Bieszczady National Park, the Carpathians, Poland, June.

Grzegorz Lesniewski / Firecrest (Regulus ignicapilla) perched on fir branch. Bieszczady National Park, the Carpathians, Poland, April.

Grzegorz Lesniewski / Brown Bear (Ursus arctos) sharpening its claws on a tree. Bieszczady National Park, the Carpathians, Poland, April.

Grzegorz Lesniewski / Long-tailed Tit (Aegithalos caudatus) portrait. Bieszczady National Park, the Carpathians, Poland, March.

Grzegorz Lesniewski / Herd of Carpathian Pony / Hucul (Equus caballus) in snow. Bieszczady National Park, the Carpathians, Poland, March.

Grzegorz Lesniewski / Herd of Carpathian Pony / Hucul (Equus caballus) in snow. Bieszczady National Park, the Carpathians, Poland, March.

Grzegorz Lesniewski / Herd of Carpathian Pony / Hucul (Equus caballus) in snow. Bieszczady National Park, the Carpathians, Poland, March.

Grzegorz Lesniewski / Ural Owl (Strix uralensis) perched. Bieszczady National Park, the Carpathians, Poland, December.

Grzegorz Lesniewski / Four Wisent / Bison (Bison bonasus) standing in a row. Bialowieza Forest, Bialowieza National Park, Poland, November.

Grzegorz Lesniewski / Two Wisent / Bison (Bison bonasus). Bialowieza Forest, Bialowieza National Park, Poland, November.

Grzegorz Lesniewski / Dawn rising behind Polonina Carynska. Bieszczady National Park, the Carpathians, Poland, October 2009.

Grzegorz Lesniewski / Swallowwort Gentian (Gentiana asclepiadea). Bieszczady National Park, the Carpathians, Poland, September.

Grzegorz Lesniewski / Eurasian Curlew (Numenius arquata) in wet grass lit by dawn light. Biebrza National Park, Biebrza marshes, Poland, May.

Grzegorz Lesniewski / Wisent / European Bison (Bison bonasus) crossing the Sun River. Bieszczady Mountains, the Carpathians, Bieszczady National Park, Poland, February.

Grzegorz Lesniewski / European Otter (Lutra lutra) with fish prey. Bieszczady National Park, the Carpathians, Poland, February.

Grzegorz Lesniewski / Whooper Swans (Cygnus cygnus) in courtship display on meadows. Odra River, Silesia, Poland, January.

Grzegorz Lesniewski / Sparrowhawk (Accipiter nisus) perched. Bieszczady Mountains, the Carpathians, Poland, October.

Grzegorz Lesniewski / Riparian forest with Crack Willow (Salix fragilis), White Willow (Salix alba) and blooming Wild Cherry (Prunus avium). Bieszczady Mountains, the Carpathians, Poland, May.

Grzegorz Lesniewski / Black Grouse (Tetrao tetrix) displaying. Biebrza National Park, Biebrza marshes, Poland, April.

Grzegorz Lesniewski / Striped Field Mouse (Apodemus agrarius) and Corn Poppy (Papaver rhoeas). Lublin Highland, Poland, August.

Grzegorz Lesniewski / Western Capercaillie (Tetrao urogallus) displaying on a felled tree. Solska Forest, Lublin Region, Poland, March.

Grzegorz Lesniewski / Wild Carpathian Wolf (Canis lupus) running over snow. Bieszczady Mountains, the Carpathians, Poland, December.

Grzegorz Lesniewski / Portrait of a European Hamster (Cricetus cricetus). Lublin Highland, Poland, June.

Grzegorz Lesniewski / Portrait of a Roe Deer (Capreolus capreolus). Marshes at Baltic Coast, Poland, August.

Grzegorz Lesniewski / Pine (Pinus silvestris) forest lit by dawn light. Masuria, Poland, May.

Grzegorz Lesniewski / Portrait of a Wood Sandpiper (Tringa glareola) in water. Biebrza National Park, Biebrza marshes, Poland, May.

Grzegorz Lesniewski / Common Reed (Phragmites australis) on fire. Biebrza National Park, Biebrza marshes, Poland, July.

Grzegorz Lesniewski / White-tailed Sea Eagle (Haliaeetus albicilla) standing in shallow water. Biebrza National Park, Biebrza Marshes, Poland, July.

Wild Wonders of Europe / Lesniewski / Corncrake (Crex crex) calling in grassland. Bieszczady, Carpathian Mountains, Poland.

Wild Wonders of Europe / Lesniewski / Tengmalm's Owl (Aegolius funereus) nesting in an old beech tree. Bieszczady, Carpathian Mountains, Poland, May.

Wild Wonders of Europe / Lesniewski / Herd of wild Carpathian Ponies / Hurcul (Equus caballus) running in snow. Bieszczady, Carpathian Mountains, Poland, March.

Wild Wonders of Europe / Lesniewski / Herd of wild Carpathian Ponies / Hurcul (Equus caballus) in snow. Bieszczady, Carpathian Mountains, Poland, March.

Wild Wonders of Europe / Lesniewski / Wisent / European bison (Bison bonasus) walking through snow. Bieszczady, Carpathian Mountains, Poland, February.

Wild Wonders of Europe / Lesniewski / Herd of Wisent / European bison (Bison bonasus) in snow. Bieszczady, Carpathian Mountains, Poland, January 2010.

Wild Wonders of Europe / Lesniewski / View of Tatra Mountains from Rozsypaniec Peak at sunset. Bieszczady, Carpathian Mountains, Poland, September 2009.

Wild Wonders of Europe / Lesniewski / Roe Deer (Capreolus capreolus) in mountain meadow. Bieszczady, Carpathian Mountains, Poland, June.

Wild Wonders of Europe / Lesniewski / Wild Brown Bear (Ursus arctos) in mountain meadow. Bieszczady, Carpathian Mountains, Poland, May.

Wild Wonders of Europe / Lesniewski / Eurasian Otter (Lutra lutra) on ice licking its lips. Bieszczady, Carpathian Mountains, Poland, February.

Wild Wonders of Europe / Lesniewski / Eurasian Sparrowhawk (Accipiter nisus) perching in a Birch tree. Bieszczady, Carpathian Mountains, Poland, September.

Wild Wonders of Europe / Lesniewski / Portrait of a wild Carpathian Grey Wolf (Canis lupus lupus) in snow-bound woodland habitat. Bieszczady, Carpathian Mountains, Poland, December.

Wild Wonders of Europe / Unterthiner / European bison (Bison bonasus) gathering at feeding site, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / Two European bison (Bison bonasus) fighting, Bialowieza NP, Poland, February 2009. WWE INDOOR EXHIBITION.

Wild Wonders of Europe / Unterthiner / European bison (Bison bonasus) in forest, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / European bison (Bison bonasus) in agricultural field, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / Rear view of European bison (Bison bonasus) in agricultural field, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / European bison (Bison bonasus) in agricultural field, Bialowieza NP, Poland, February 2009

Wild Wonders of Europe / Unterthiner / European bison (Bison bonasus) behind tree, Bialowieza NP, Poland, February

Wild Wonders of Europe / López / Spotted souslik (Spermophilus suslicus) profile, Werbkowice, Zamosc, Poland, May 2009