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

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

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

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

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

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

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

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

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

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

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