swamp Landscape with the Biebrza from the Polish Podlasie Biebrza National Park during sunset, Poland Biebrza National Park during sunset, Poland Biebrza National Park during sunset, Poland Biebrza National Park during sunset, Poland Biebrza National Park during sunset, Poland Moose, Alces alces, in the natural environment swamp. Biebrza marshes National Park. The largest mammal hoofed on swamps. Moose, Alces alces, in the natural environment swamp. Biebrza marshes National Park. The largest mammal hoofed on swamps. Moose, Alces alces, in the natural environment swamp. Biebrza marshes National Park. The largest mammal hoofed on swamps. Moose, Alces alces, in the natural environment swamp. Biebrza marshes National Park. The largest mammal hoofed on swamps. Single White Stork bird in wetlands green grass in Biebrza national park, Poland Single White Stork bird in wetlands green grass in Biebrza national park, Poland Single White Stork bird in wetlands green grass in Biebrza national park, Poland Single White Stork bird in wetlands green grass in Biebrza national park, Poland Juvenile Common Tern, Sterna hirundo, on Lake Skadar in Montenegro. Grey heron, Ardea cinerea, in Lake Skadar in Montenegro, Balkans. Grey heron, Ardea cinerea, in Lake Skadar in Montenegro, Balkans. Pygmy cormorant, Phalacrocorax pygmaeus, in Lake Skadar in Montenegro. Grey heron, Ardea cinerea, in Lake Skadar in Montenegro, Balkans. Underwater springs in Skadar Lake National Park in Montenegro. Underwater springs in Skadar Lake National Park in Montenegro.