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Yellow-crowned Night Heron (Nyctanassa violacea), Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Wood Storks (Mycteria Americana) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Wood Stork (Mycteria Americana) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egret (Ardea alba) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge Florida, USA

Great white egret (Ardea alba) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egrets (Ardea alba) looking for food in a pond, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egrets (Ardea alba) looking for food in a pond, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Tricolored herons (Egretta tricolor) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge Florida, USA

Great white egrets (Ardea alba) looking for food in a pond, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egrets (Ardea alba) and Tricolored heron (Egretta tricolor) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egrets (Ardea alba) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Great white egrets (Ardea alba) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Wood Stork (Mycteria Americana) and Roseate Spoonbills (Platalea ajaja) fishing, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Wood Stork (Mycteria Americana) and Roseate Spoonbills (Platalea ajaja) fishing, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Gadwall (Anas strepera) male standing on a frozen pond in the winter, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Juvenile double-crested cormorant (Phalacrocorax auritus) spreading its wings to dry, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Black-necked stilt (Himantopus mexicanus) wading while feeding, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear), Kenai National Wildlife Refuge, Alaska, United States of America, North America

Chesapeake Bay saltmarsh and winding creeks of the Plumtree National Wildlife Refuge, Hampton, Virginia, United States of America, North America

African forest elephant (Loxodonta cyclotis), Dzanga Bai, Dzanga Sangha National Park, UNESCO, Central African Republic

View from Park Service platform where adult brown bears (Ursus arctos) forage for salmon, Katmai National Park, Alaska, United States of America

American coot (Fulica americana) walking on ice, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Red-tailed hawk (Buteo jamaicensis) juvenile in a snow-covered tree, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American kestrel (sparrow hawk) (Falco sparverius) female, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Red-tailed hawk (Buteo jamaicensis) taking off, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Mule deer (Odocoileus hemionus) buck, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American kestrel (sparrow hawk) (Falco sparverius) female, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American kestrel (sparrow hawk) (Falco sparverius) female, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Tent at Camp 4 at 6100m on Peak Korzhenevskaya, 7105m, at sunset, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Tent at Camp 4 at 6100m on Peak Korzhenevskaya, 7105m, at sunset, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Moskvina base camp, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Tent at Camp 4 at 6100m on Peak Korzhenevskaya, 7105m, at sunset, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Tents at Camp 1 at 5100m on Peak Korzhenevskaya, 7105m, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Group of Great white egrets (Ardea alba) and Wood Stork (Mycteria Americana) perching on tree, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, USA

Juvenile red-tailed hawk (Buteo jamaicensis) in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) scratching its back on tree, Brooks River, Katmai National Park near Bristol Bay, Alaska, United States of America

Tent at Camp 4 at 6100m on Peak Korzhenevskaya, 7105m, at sunset, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Gambel's quail (Callipepla gambelii), male, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Northern shoveler (Anas clypeata) male landing on a frozen pond in the winter, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Tents at Camp 1 at 5100m on Peak Korzhenevskaya, 7105m, Tajik National Park (Mountains of the Pamirs), UNESCO World Heritage Site, Tajikistan, Central Asia, Asia

Group of Great white egrets (Ardea alba) looking for food in a pond, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Wood Stork (Mycteria Americana) in flight, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

American kestrel (sparrow hawk) (Falco sparverius), male, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Snow goose (Chen caerulescens) flock in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Roseate spoonbill (Ajaia ajaja), J. N. "Ding" Darling National Wildlife Refuge, Florida, United States of America, North America

Black-necked stilt (Himantopus mexicanus), Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Snow goose (Chen caerulescens) landing, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Sandhill crane (Grus Canadensis) in flight parachuting on approach to landing, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Northern pintail (Anas acuta) male swimming, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Whitetail prairie dog (Cynomys luscurus), Arapaho National Wildlife Refuge, Colorado, United States of America, North America

Male Gambel's quail (Callipepla gambelii), Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Red-tailed hawk (Buteo jamaicensis), juvenile, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Striped skunk (Mephitis mephitis), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Snow goose (Chen caerulescens) in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Sandhill crane (Grus canadensis) in flight, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Snow goose (Chen caerulescens) flock in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Great white egret (Ardea alba) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Snow goose (Chen caerulescens) swimming, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American White Pelican (Pelecanus erythrorhynchos) in flight shortly after taking off, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Red-tailed hawk (Buteo jamaicensis), juvenile, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Two sandhill crane (Grus Canadensis) in the snow, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

White-crowned sparrow (Zonotrichia leucophrys), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Two snow goose (Chen caerulescens) landing, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Double-crested cormorant (Phalacrocorax auritus), Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Northern pintail (Anas acuta), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Snowy egret (Egretta thula), Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Great blue heron (Ardea herodias) in flight, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Sharp-Shinned Hawk (Accipiter striatus), Bosque del Apache, National Wildlife Refuge, New Mexico, USA

White-crowned sparrow (Zonotrichia leucophrys), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Bufflehead (Bucephala albeola), male, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Western grebe (Aechmophorus occidentalis) floating, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Semipalmated sandpiper (Calidris pusilla) wading while feeding, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Sandhill crane (Grus canadensis) in flight, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Two sandhill crane (Grus canadensis) in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Brown pelican (Pelicanus occidentalis), J. N. "Ding" Darling National Wildlife Refuge, Florida, United States of America, North America

Semipalmated sandpiper (Calidris pusilla) wading while feeding, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Pink clouds and pond at sunrise, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Thayer's gull (Larus thayeri), Kenai National Wildlife Refuge, Alaska, United States of America, North America

White-crowned sparrow (Zonotrichia leucophrys), juvenile, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American White Pelican (Pelecanus erythrorhynchos), Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Greater Roadrunner (Geococcyx californianus), Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater roadrunner (Geococcyx californianus), Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

American alligator (Alligator mississipiensis), submerging, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Great white egret (Ardea alba) looking for food, Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Yellow-crowned night heron (Nyctanassa violacea), J. N. "Ding" Darling National Wildlife Refuge, Florida, United States of America, North America

Kilauea Lighthouse, Kilauea Point, National Wildlife Refuge, Island of Kauai, Hawaii, United States of America, Pacific, North America

Sandhill crane (Grus canadensis) taking off, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Two Sandhill Cranes (Grus canadensis) in flight in late afternoon light, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Greater Roadrunner (Geococcyx californianus), Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Common snipe (Gallinago gallinago), Arapaho National Wildlife Refuge, Colorado, United States of America, North America

Snow goose (Chen caerulescens) in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Sandhill crane (Grus canadensis) taking off from a pond, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Common snipe (Gallinago gallinago), Arapaho National Wildlife Refuge, Colorado, United States of America, North America

Snow goose (Chen caerulescens) flock in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Sandhill crane (Grus canadensis) in flight, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Pink clouds and pond at sunrise, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America