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Male yellow-headed blackbird (Xanthocephalus xanthocephalus) dislaying, Yellowstone National Park, Wyoming, United States of America, North America
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Male Yellow-Headed Blackbird (Xanthocephalus xanthocephalus), Yellowstone National Park, Wyoming, United States of America, North America
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Yellow-headed blackbird (Xanthocephalus xanthocephalus), Yellowstone National Park, Wyoming, United States of America, North America
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Male red-winged blackbird (Agelaius phoeniceus) displaying, Pawnee National Grassland, Colorado, United States of America, North America
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Male Audubon's Yellow-Rumped Warbler (Dendroica coronata auduboni), Yellowstone National Park, Wyoming, United States of America, North America
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Male Red-Winged Blackbird (Agelaius phoeniceus), Yellowstone National Park, Wyoming, United States of America, North America
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Male Williamson's sapsucker (Sphyrapicus thyroideus), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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Mountain Bluebird (Sialia currucoides) male, Yellowstone National Park, Wyoming, United States of America, North America
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Western meadowlark (Sturnella neglecta) singing, Yellowstone National Park, Wyoming, United States of America, North America
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Male Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
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Female Williamson's sapsucker (Sphyrapicus thyroideus) on a feeding tree, Yellowstone National Park, Wyoming, United States of America, North America
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Sandhill crane (Grus canadensis), Yellowstone National Park, Wyoming, United States of America, North America
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American Kestrel (Sparrow Hawk) (Falco sparverius), male, Yellowstone National Park, Wyoming, United States of America, North America
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Reed cormorant (Phalacrocorax africanus), Chobe National Park, Botswana, Africa
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Female Williamson's sapsucker (Sphyrapicus thyroideus), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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American pika (Ochotona princeps) calling, San Juan National Forest, Colorado, United States of America, North America
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Male Williamson's sapsucker (Sphyrapicus thyroideus) poking out of its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
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Black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
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Brown-headed cowbird (Molothrus ater), Yellowstone National Park, Wyoming, United States of America, North America
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Greater roadrunner (Geococcyx californianus) in captivity, Living Desert Zoo And Gardens State Park, New Mexico, United States of America, North America
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Bison (Bison bison) bull among yellow wildflowers, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull, Yellowstone National Park, Wyoming, United States of America, North America
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Beautiful sunbird (Cinnyris pulchella), male, Ngorongoro Conservation Area, Serengeti, Tanzania, East Africa, Africa
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Male yellow-headed blackbird (Xanthocephalus xanthocephalus), Bear River Migratory Bird Refuge, Utah, United States of America
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Von Der Decken's hornbill (Tockus deckeni), male, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa
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Great gray owl (great grey owl) (Strix nebulosa) adult leaving a perch, Yellowstone National Park, Wyoming, United States of America, North America
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Mountain bluebird (Sialia currucoides) pair at their nest, Yellowstone National Park, Wyoming, United States of America, North America
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Male Mountain Bluebird (Sialia currucoides) with food at the nest, Yellowstone National Park, Wyoming, United States of America, North America
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Female Mountain Bluebird (Sialia currucoides) at the nest, Yellowstone National Park, Wyoming, United States of America, North America
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American Robin (Turdus migratorius), Yellowstone National Park, Wyoming, United States of America, North America
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Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) calling, San Juan National Forest, Colorado, United States of America, North America
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Thick-billed raven (Corvus crassirostris), Simien Mountains National Park, Amhara region, North Ethiopia, Ethiopia, Africa
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Male mountain bluebird (Sialia currucoides), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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White ibis (Eudocimus albus), Everglades, Florida, United States of America, North America
Rights-Managed
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Snowy egret (Egretta thula), Everglades, Florida, United States of America, North America
Rights-Managed
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Snowy egret (Egretta thula), Everglades, Florida, United States of America, North America
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Great egret (Ardea alba), Everglades, Florida, United States of America, North America
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Western kingbird (Tyrannus verticalis), Pawnee National Grassland, Colorado, United States of America, North America
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Female Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
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Grizzly Bear (Ursus arctos horribilis) walking, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull and cow, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull, Yellowstone National Park, Wyoming, United States of America, North America
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Male black wildebeest (white-tailed gnu (Connochaetes gnou) calling, Mountain Zebra National Park, South Africa, Africa
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Bighorn sheep (Ovis canadensis) ram eating in the winter, Yellowstone National Park, Wyoming, United States of America, North America
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Bull elk (Cervus canadensis) feeding in the winter, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull in the snow, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull in the snow, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) cow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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Grizzly Bear (Ursus arctos horribilis), yearling cub, Yellowstone National Park, Wyoming, United States of America, North America
Rights-Managed
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Bull elk (Cervus canadensis) in the snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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Bison (Bison bison) bull covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
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Black bear (Ursus americanus) in the spring, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull in the spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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Black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
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Common Raven (Corvus corax), Yellowstone National Park, Wyoming, United States of America, North America
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American kestrel (sparrow hawk) (Falco sparverius) female, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America
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Red-winged blackbird (Agelaius phoeniceus) male, San Jacinto Wildlife Area, California, United States of America, North America
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Bald eagle (Haliaeetus leucocephalus) in flight, Yellowstone National Park, Wyoming, United States of America, North America
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Woodland kingfisher (Halcyon senegalensis), Kruger National Park, South Africa, Africa
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African grey hornbill (African gray hornbill) (Tockus nasutus), female, Serengeti National Park, Tanzania, East Africa, Africa
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Woodland kingfisher (Halcyon senegalensis), Serengeti National Park, Tanzania, East Africa, Africa
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Immature barn swallow (Hirundo rustica), Great Bear Rainforest, British Columbia Canada, North America
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Rosy-breasted longclaw (pink-throated longclaw) (Macronyx ameliae) singing, Ngorongoro Crater, Tanzania, East Africa, Africa
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Spotted Sandpiper (Actitis macularia), Yellowstone National Park, Wyoming, United States of America, North America
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Cinnamon Black Bear (Ursus americanus) yearling cub climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
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Female Mountain Bluebird (Sialia currucoides) with food at the nest, Yellowstone National Park, Wyoming, United States of America, North America
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Female Barrow's Goldeneye (Bucephala islandica), Yellowstone National Park, Wyoming, United States of America, North America
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Pronghorn (Antilocapra americana) buck, Yellowstone National Park, Wyoming, United States of America, North America
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Southern Yellow-Billed Hornbill (Tockus leucomelas), Kruger National Park, South Africa, Africa
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Coyote (Canis latrans) in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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Portrait of a Snowy Egret (Egretta thula) against blue sky, United States of America, North America
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Barred Owl (Strix varia) stretching its wing, United States of America, North America
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Male Magnificent Frigatebird (Fregata magnificens) with inflated gular sac, North Seymour Island, Galapagos National Park, Ecuador, South America
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Portrait of Snowy Egret (Egretta thula) against blue sky, United States of America, North America
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Portrait of Cattle Egret (Bubulcus ibis), United States of America, North America
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Crested barbet (Trachyphonus vaillantii) with a raised crest, Selous Game Reserve, Tanzania, East Africa, Africa
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Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris), San Juan National Forest, Colorado, United States of America, North America
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Thick-billed raven (Corvus crassirostris), Simien mountains National Park, Amhara region, North Ethiopia, Africa
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Common raven (Corvus corax), Petrified Forest National Park, Arizona, United States of America, North America
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Male dusky grouse (blue grouse) (Dendragapus obscurus) displaying, Yellowstone National Park, Wyoming, United States of America, North America
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Bison (Bison bison) bull demonstrating the flehmen response, Yellowstone National Park, Wyoming, United States of America, North America
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Male saddle-billed stork (Ephippiorhynchus senegalensis), Ngorongoro Crater, Tanzania, East Africa, Africa
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White ibis (Eudocimus albus), Everglades, Florida, United States of America, North America
Rights-Managed
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Great egret (Ardea alba), Everglades, Florida, United States of America, North America
Rights-Managed
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Great egret (Ardea alba), Everglades, Florida, United States of America, North America
Rights-Managed
