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American Bison (Bison bison) female in winter, Yellowstone National Park, Wyoming  -  Sebastian Kennerknecht / Minden
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Sebastian Kennerknecht / Minden / American Bison (Bison bison) female in winter, Yellowstone National Park, Wyoming
Jaguar (Panthera onca) predating Spectacled Caiman (Caiman crocodilus) in river, Pantanal, Brazil  -  Daniel J. Cox / Minden
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Daniel J. Cox / Minden / Jaguar (Panthera onca) predating Spectacled Caiman (Caiman crocodilus) in river, Pantanal, Brazil
Red mangrove (Rhizophora mangle) propagules / plantlets which become fully mature plants before dropping off the parent tree to drift away and establish a new tree. Bahamas.  -  Shane Gross
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Shane Gross / Red mangrove (Rhizophora mangle) propagules / plantlets which become fully mature plants before dropping off the parent tree to drift away and establish a new tree. Bahamas.
Spiny dogfish (Squalus acanthias) portrait. Rhode Island, New England, USA. August.  -  Andy Murch
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Andy Murch / Spiny dogfish (Squalus acanthias) portrait. Rhode Island, New England, USA. August.
Desert lilies (Hesperocallis undulata) flowering in spring on dunes at dawn. Mohawk Dunes, Barry M. Goldwater Range, Sonoran Desert, Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Desert lilies (Hesperocallis undulata) flowering in spring on dunes at dawn. Mohawk Dunes, Barry M. Goldwater Range, Sonoran Desert, Arizona, USA.
Moran Point with snow on the pinnacles, Grand Canyon National Park, Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Moran Point with snow on the pinnacles, Grand Canyon National Park, Arizona, USA.
Horseshoe Bend of the Salt River with Saguaro cacti (Carnegiea gigantea), Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Horseshoe Bend of the Salt River with Saguaro cacti (Carnegiea gigantea), Arizona, USA.
Saguaro cacti (Carnegiea gigantea) Cabeza Prieta National Wildlife Refuge, Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Saguaro cacti (Carnegiea gigantea) Cabeza Prieta National Wildlife Refuge, Arizona, USA.
Elves Chasm with maidenhair ferns and monkey flowers. Grand Canyon National Park, Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Elves Chasm with maidenhair ferns and monkey flowers. Grand Canyon National Park, Arizona, USA.
Light shining through the U.S. border wall, Organ Pipe Cactus National Monument, Arizona, USA, March 2020.  -  Wendy Shattil
01667039
Wendy Shattil / Light shining through the U.S. border wall, Organ Pipe Cactus National Monument, Arizona, USA, March 2020.
Lemon shark juvenile (Negaprion brevirostris) swimming in mangrove habitat near blue crab (Callinectes sapidus), a prey species for the shark. Eleuthera, Bahamas.  -  Shane Gross
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Shane Gross / Lemon shark juvenile (Negaprion brevirostris) swimming in mangrove habitat near blue crab (Callinectes sapidus), a prey species for the shark. Eleuthera, Bahamas.
Lemon shark juvenile (Negaprion brevirostris) trying to feed on the leaves of a red mangrove (Rhizophora mangle). As pups, the sharks have to learn to hunt for themselves and sometimes make mistakes....  -  Shane Gross
01664555
Shane Gross / Lemon shark juvenile (Negaprion brevirostris) trying to feed on the leaves of a red mangrove (Rhizophora mangle). As pups, the sharks have to learn to hunt for themselves and sometimes make mistakes....
Joshua Trees (Yucca brevifolia) of the Mojave Desert at dawn encircled with flowering lupines. (Lupinus sp,) Mohave County, Castaneda Wash, Arizona, USA.  -  Jack Dykinga
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Jack Dykinga / Joshua Trees (Yucca brevifolia) of the Mojave Desert at dawn encircled with flowering lupines. (Lupinus sp,) Mohave County, Castaneda Wash, Arizona, USA.
Ancient Bristlecone Pine Forest with twisted limbs of Bristlecone pine (Pinus longaeva) at dawn on the White Mountains, Inyo National Forest, California, USA.  -  Jack Dykinga
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Jack Dykinga / Ancient Bristlecone Pine Forest with twisted limbs of Bristlecone pine (Pinus longaeva) at dawn on the White Mountains, Inyo National Forest, California, USA.
Long-billed curlew (Numenius americanus) taking off along shoreline. Fort De Soto Park, Florida, USA. April.  -  Guy Edwardes
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Guy Edwardes / Long-billed curlew (Numenius americanus) taking off along shoreline. Fort De Soto Park, Florida, USA. April.
American crocodile (Crocodylus acutus) shows off its teeth. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.  -  Alex Mustard
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Alex Mustard / American crocodile (Crocodylus acutus) shows off its teeth. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.
Blue jay (Cyanocitta cristata) in flight carrying an acorn that it will cache for winter food supply, New York, USA, October.  -  Marie Read
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Marie Read / Blue jay (Cyanocitta cristata) in flight carrying an acorn that it will cache for winter food supply, New York, USA, October.
Northern cardinal (Cardinalis cardinalis) male in a late summer garden setting, Coreopsis sp. flowers around the perch, New York, USA, August.  -  Marie Read
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Marie Read / Northern cardinal (Cardinalis cardinalis) male in a late summer garden setting, Coreopsis sp. flowers around the perch, New York, USA, August.
Blue jay (Cyanocitta cristata) flying, head on, Acadia National Park, Maine, USA. May.  -  George Sanker
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George Sanker / Blue jay (Cyanocitta cristata) flying, head on, Acadia National Park, Maine, USA. May.
Mustang herd standing in snow. Black Hills Wild Horse Sanctuary, South Dakota, USA. January 2017.  -  Carol Walker
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Carol Walker / Mustang herd standing in snow. Black Hills Wild Horse Sanctuary, South Dakota, USA. January 2017.
Captive corn snake (Pantherophis guttatus) eating an Eastern chipmunk (Eutamias sp.). The chipmunk was found dead and fed to the captive snake. North America.  -  John Cancalosi
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John Cancalosi / Captive corn snake (Pantherophis guttatus) eating an Eastern chipmunk (Eutamias sp.). The chipmunk was found dead and fed to the captive snake. North America.
Bison (Bison bison) herd grazing on plain, snow and cloud covered mountains in background. Grand Tetons area, Wyoming, USA.? September 2019.  -  Doug Gimesy
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Doug Gimesy / Bison (Bison bison) herd grazing on plain, snow and cloud covered mountains in background. Grand Tetons area, Wyoming, USA.? September 2019.
North American river otter (Lontra canadensis) on back, rolling on snow bank. Yellowstone National Park, USA, January.  -  Danny Green
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Danny Green / North American river otter (Lontra canadensis) on back, rolling on snow bank. Yellowstone National Park, USA, January.
North American river otter (Lontra canadensis) female and cub walking across snow, reflected in water. Yellowstone National Park, USA, January.  -  Danny Green
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Danny Green / North American river otter (Lontra canadensis) female and cub walking across snow, reflected in water. Yellowstone National Park, USA, January.
North American river otter (Lontra canadensis) on snow covered bank, reflected in icy water. Yellowstone National Park, USA, January.  -  Danny Green
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Danny Green / North American river otter (Lontra canadensis) on snow covered bank, reflected in icy water. Yellowstone National Park, USA, January.
Sea otter (Enhydra lutris) female and pup playing. Alaska, USA, February.  -  Danny Green
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Danny Green / Sea otter (Enhydra lutris) female and pup playing. Alaska, USA, February.
Sea otter (Enhydra lutris) female and pup. Alaska, USA, February.  -  Danny Green
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Danny Green / Sea otter (Enhydra lutris) female and pup. Alaska, USA, February.
Coyote (Canis latrans) standing in snow, dwarfed by frosty trees. Yellowstone National Park, USA, January.  -  Danny Green
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Danny Green / Coyote (Canis latrans) standing in snow, dwarfed by frosty trees. Yellowstone National Park, USA, January.
Bison (Bison bison) in snow, at woodland edge with frost covered trees. Yellowstone National Park, USA, January 2020.  -  Danny Green
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Danny Green / Bison (Bison bison) in snow, at woodland edge with frost covered trees. Yellowstone National Park, USA, January 2020.
Big horn sheep (Ovis canadensis) male looking down from snowy ledge, portrait. Yellowstone National Park, USA, January.  -  Danny Green
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Danny Green / Big horn sheep (Ovis canadensis) male looking down from snowy ledge, portrait. Yellowstone National Park, USA, January.
Bald eagle (Haliaeetus leucocephalus), two perched on rocks in front of frozen waterfall. Alaska, USA, February.  -  Danny Green
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Danny Green / Bald eagle (Haliaeetus leucocephalus), two perched on rocks in front of frozen waterfall. Alaska, USA, February.
Canada Goose (Branta canadensis) on nest with goslings, New York, USA.  -  John Cancalosi
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John Cancalosi / Canada Goose (Branta canadensis) on nest with goslings, New York, USA.
Piraputanga (Brycon hilarii) fish swimming in clear river with trees visible overhead. Brazil, South America.  -  Brandon Cole
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Brandon Cole / Piraputanga (Brycon hilarii) fish swimming in clear river with trees visible overhead. Brazil, South America.
Yellow-headed blackbird (Xanthocephalus xanthocephalus) flock murmuration as they take off from the marsh at dawn, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January.  -  Jack Dykinga
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Jack Dykinga / Yellow-headed blackbird (Xanthocephalus xanthocephalus) flock murmuration as they take off from the marsh at dawn, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January.
Leafless Cottonwood trees (Populus sp.) and cattails reflected in the water at dawn, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January 2020.  -  Jack Dykinga
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Jack Dykinga / Leafless Cottonwood trees (Populus sp.) and cattails reflected in the water at dawn, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January 2020.
Osprey (Pandion haliaetus) landing at its nest in a Bald cypress tree (Taxodium distichum) draped with epiphytic Spanish moss (Tillandsia usneoides). Blue Cypress Lake, Florida, USA. April.  -  John Shaw
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John Shaw / Osprey (Pandion haliaetus) landing at its nest in a Bald cypress tree (Taxodium distichum) draped with epiphytic Spanish moss (Tillandsia usneoides). Blue Cypress Lake, Florida, USA. April.
American red squirrel (Tamiasciurus hudsonicus) on tree trunk drinking in a beaver pond early in the morning. Acadia National Park, Maine, USA. May.  -  George Sanker
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George Sanker / American red squirrel (Tamiasciurus hudsonicus) on tree trunk drinking in a beaver pond early in the morning. Acadia National Park, Maine, USA. May.
Northern Cardinals (Cardinalis cardinalis) male and female in the snow, photographed from low angle, Freeville, New York, USA. April 2020.  -  Marie Read
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Marie Read / Northern Cardinals (Cardinalis cardinalis) male and female in the snow, photographed from low angle, Freeville, New York, USA. April 2020.
Blue jays (Cyanocitta cristata) confrontation in snow, April 2020. New York State, USA.  -  Marie Read
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Marie Read / Blue jays (Cyanocitta cristata) confrontation in snow, April 2020. New York State, USA.
Yellow Warbler (Setophaga petechia, formerly Dendroica petechia), male in breeding plumage, Ithaca, New York, USA. May 2020.  -  Marie Read
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Marie Read / Yellow Warbler (Setophaga petechia, formerly Dendroica petechia), male in breeding plumage, Ithaca, New York, USA. May 2020.
Red-winged Blackbird (Agelaius phoenicus) male singing from snow-covered red maple (Acer rubrum) in flower, Ithaca, New York, USA. April 2020.  -  Marie Read
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Marie Read / Red-winged Blackbird (Agelaius phoenicus) male singing from snow-covered red maple (Acer rubrum) in flower, Ithaca, New York, USA. April 2020.
Red-winged Blackbird (Agelaius phoeniceus) male calling/displaying, Ithaca, New York, USA. March 2020.  -  Marie Read
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Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male calling/displaying, Ithaca, New York, USA. March 2020.
Canada goose (Branta canadensis) with gosling, a few days old. Massachusetts, USA. April.  -  Tim  Laman
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Tim Laman / Canada goose (Branta canadensis) with gosling, a few days old. Massachusetts, USA. April.
Canada goose (Branta canadensis) with gosling, a few days old. Massachusetts, USA. April.  -  Tim  Laman
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Tim Laman / Canada goose (Branta canadensis) with gosling, a few days old. Massachusetts, USA. April.
Wild turkey (Meleagris gallopavo) male displaying during spring mating season. Acadia National Park, Maine, USA. April.  -  George Sanker
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George Sanker / Wild turkey (Meleagris gallopavo) male displaying during spring mating season. Acadia National Park, Maine, USA. April.
Wood duck (Aix sponsa) male in breeding plumage. Acadia National Park, Maine, USA. April.  -  George Sanker
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George Sanker / Wood duck (Aix sponsa) male in breeding plumage. Acadia National Park, Maine, USA. April.
Wild turkey (Meleagris gallopavo) male displaying during spring mating season. Acadia National Park, Maine, USA. April.  -  George Sanker
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George Sanker / Wild turkey (Meleagris gallopavo) male displaying during spring mating season. Acadia National Park, Maine, USA. April.
American crocodile (Crocodylus acutus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.  -  Claudio Contreras
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Claudio Contreras / American crocodile (Crocodylus acutus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.
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