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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.
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.
Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.  -  Jack Dykinga
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Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.
Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...  -  John Chan
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John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...
RF - Brown hare, (Lepus europaeus) male pursuing female that is in season, Islay, Scotland, UK., March (This image may be licensed either as rights managed or royalty free.)  -  SCOTLAND: The Big Picture
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SCOTLAND: The Big Picture / RF - Brown hare, (Lepus europaeus) male pursuing female that is in season, Islay, Scotland, UK., March (This image may be licensed either as rights managed or royalty free.)
Forest fire in the Cerrado during dry season. Chapada dos Veadeiros National Park, Goias, Brazil. September 2010.  -  Angelo Gandolfi
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Angelo Gandolfi / Forest fire in the Cerrado during dry season. Chapada dos Veadeiros National Park, Goias, Brazil. September 2010.
Coalition of two African male lions (Panthera leo) resting on the banks of the Luangwa river, dry season, South Luangwa National Park, Zambia  -  Eric Baccega
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Eric Baccega / Coalition of two African male lions (Panthera leo) resting on the banks of the Luangwa river, dry season, South Luangwa National Park, Zambia
Composite image of Fireflies synchronize display just after first shower of monsoon, on moonless night. India.  -  Yashpal Rathore
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Yashpal Rathore / Composite image of Fireflies synchronize display just after first shower of monsoon, on moonless night. India.
Budgerigars (Melopsittacus undulatus) flocking to find water, Northern Territory, Australia  -  Paul Williams
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Paul Williams / Budgerigars (Melopsittacus undulatus) flocking to find water, Northern Territory, Australia
Male Common toads (Bufo bufo) fighting underwater during mating season, with a pair mating Ain, Rhone-Alps, France, March.  -  Remi Masson
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Remi Masson / Male Common toads (Bufo bufo) fighting underwater during mating season, with a pair mating Ain, Rhone-Alps, France, March.
Two male Dusky groupers (Epinephelus marginatus) fighting for territory during mating season at 'baixa do meros', a small pinnacle at Formigas islets Protected area, near Santa Maria Island, Azores. F...  -  Jordi Chias
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Jordi Chias / Two male Dusky groupers (Epinephelus marginatus) fighting for territory during mating season at 'baixa do meros', a small pinnacle at Formigas islets Protected area, near Santa Maria Island, Azores. F...
Head portrait of young domestic Landrace pig (Sus scrofa domesticus), organic open air breeding, Germany.  -  Klein & Hubert
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Klein & Hubert / Head portrait of young domestic Landrace pig (Sus scrofa domesticus), organic open air breeding, Germany.
Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.  -  Klein & Hubert
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Klein & Hubert / Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.
Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.  -  Klein & Hubert
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Klein & Hubert / Organic free range domestic Landrace pig (Sus scrofa domesticus) running in autumn pasture, Germany.
Great egret (Ardea alba) with green colouring near beak during breeding season, Lake Csaj, Pusztaszer, Hungary, April.  -  Bence  Mate
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Bence Mate / Great egret (Ardea alba) with green colouring near beak during breeding season, Lake Csaj, Pusztaszer, Hungary, April.
African elephant (Loxodonta africana) herd with calves, walking in procession to a waterhole in sand  storm, Etosha National Park, Namibia, Africa  -  Eric Baccega
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Eric Baccega / African elephant (Loxodonta africana) herd with calves, walking in procession to a waterhole in sand storm, Etosha National Park, Namibia, Africa
Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) Avra Valley, Saguaro National Park, Tucson Mountains, Arizona, USA, August 2015. Long exposure with lightning trigger.  -  Jack Dykinga
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Jack Dykinga / Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) Avra Valley, Saguaro National Park, Tucson Mountains, Arizona, USA, August 2015. Long exposure with lightning trigger.
Great crested grebe (Podiceps cristatus cristatus) rival males fighting during mating season, Cardiff, UK, March.  -  Andy  Rouse
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Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) rival males fighting during mating season, Cardiff, UK, March.
Firefly squid (Watasenia scintillans) close to beach during mating season. Toyama Bay, Japan.  -  Mark  MacEwen
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Mark MacEwen / Firefly squid (Watasenia scintillans) close to beach during mating season. Toyama Bay, Japan.
Polar Bear (Ursus maritimus) sitting in field of fireweed, Arctic  -  Mitsuaki Iwago
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Mitsuaki Iwago / Polar Bear (Ursus maritimus) sitting in field of fireweed, Arctic
Autumn in the Ogilvie Mountains and boreal forest near the Dempster Highway, Yukon, Canada  -  Theo Allofs
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Theo Allofs / Autumn in the Ogilvie Mountains and boreal forest near the Dempster Highway, Yukon, Canada
Siberian Tiger (Panthera tigris altaica) juvenile running through snow, native to Russia  -  Ondrej Prosicky/ BIA
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Ondrej Prosicky/ BIA / Siberian Tiger (Panthera tigris altaica) juvenile running through snow, native to Russia
Red Fox (Vulpes vulpes) pair playing in snow, Germany  -  Ondrej Prosicky/ BIA
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Ondrej Prosicky/ BIA / Red Fox (Vulpes vulpes) pair playing in snow, Germany
Long-eared Owl (Asio otus) in autumn with mouse prey, Norway  -  Ondrej Prosicky/ BIA
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Ondrej Prosicky/ BIA / Long-eared Owl (Asio otus) in autumn with mouse prey, Norway
Ural Owl (Strix uralensis) in autumn, Sweden  -  Ondrej Prosicky/ BIA
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Ondrej Prosicky/ BIA / Ural Owl (Strix uralensis) in autumn, Sweden
Woodland Caribou (Rangifer tarandus caribou) bull in autumn, Newfoundland, Canada  -  Mark Raycroft
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Mark Raycroft / Woodland Caribou (Rangifer tarandus caribou) bull in autumn, Newfoundland, Canada
Woodland Caribou (Rangifer tarandus caribou) bull in town in autumn, Newfoundland, Canada  -  Mark Raycroft
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Mark Raycroft / Woodland Caribou (Rangifer tarandus caribou) bull in town in autumn, Newfoundland, Canada
Common Sunflower (Helianthus annuus) field, Bourgogne, France  -  Cyril Ruoso
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Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France
Common Sunflower (Helianthus annuus) field, Bourgogne, France  -  Cyril Ruoso
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Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France
Red Deer (Cervus elaphus) stag bugling during autumn rutting season, Denmark  -  Cyril Ruoso
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Cyril Ruoso / Red Deer (Cervus elaphus) stag bugling during autumn rutting season, Denmark
Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France  -  Cyril Ruoso
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Cyril Ruoso / Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France
Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France  -  Cyril Ruoso
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Cyril Ruoso / Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France
Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France  -  Cyril Ruoso
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Cyril Ruoso / Alpine Ibex (Capra ibex) adult male standing in snowy mountains, Alps, France
Barbary Macaque (Macaca sylvanus) male with infant in snow-covered tree, winter, Middle Atlas Mountains, Morocco  -  Cyril Ruoso
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Cyril Ruoso / Barbary Macaque (Macaca sylvanus) male with infant in snow-covered tree, winter, Middle Atlas Mountains, Morocco
Barbary Macaque (Macaca sylvanus) infant riding on the back of an adult male, winter, Middle Atlas Mountains, Morocco  -  Cyril Ruoso
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Cyril Ruoso / Barbary Macaque (Macaca sylvanus) infant riding on the back of an adult male, winter, Middle Atlas Mountains, Morocco
Woodland Caribou (Rangifer tarandus caribou) females in autumn, Newfoundland, Canada  -  Mark Raycroft
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Mark Raycroft / Woodland Caribou (Rangifer tarandus caribou) females in autumn, Newfoundland, Canada
Woodland Caribou (Rangifer tarandus caribou) females in autumn, Newfoundland, Canada  -  Mark Raycroft
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Mark Raycroft / Woodland Caribou (Rangifer tarandus caribou) females in autumn, Newfoundland, Canada
Pronghorn Antelope (Antilocapra americana) running in winter, North America  -  Mark Raycroft
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Mark Raycroft / Pronghorn Antelope (Antilocapra americana) running in winter, North America
California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers, super bloom, Antelope Valley, California  -  Jeff Foott
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Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers, super bloom, Antelope Valley, California
California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers,superbloom, Antelope Valley, California  -  Jeff Foott
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Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers,superbloom, Antelope Valley, California
Turret Arch in winter, La Sal Mountains, Arches National Park, Utah  -  Jeff Foott
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Jeff Foott / Turret Arch in winter, La Sal Mountains, Arches National Park, Utah
Marching Men sandstone formation, Arches National Park, Utah  -  Jeff Foott
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Jeff Foott / Marching Men sandstone formation, Arches National Park, Utah
Winding road and sandstone formations, La Sal Mountains, Arches National Park, Utah  -  Jeff Foott
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Jeff Foott / Winding road and sandstone formations, La Sal Mountains, Arches National Park, Utah
Icebergs in winter in lake, Hooker Glacier, Mount Cook, Mount Cook National Park, New Zealand  -  Colin Monteath/ Hedgehog House
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Colin Monteath/ Hedgehog House / Icebergs in winter in lake, Hooker Glacier, Mount Cook, Mount Cook National Park, New Zealand
Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah  -  Jeff Foott
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Jeff Foott / Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah
Mountains and river after autumn snowfall, Sunwapta River, Jasper National Park, Alberta, Canada  -  Jeff Foott
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Jeff Foott / Mountains and river after autumn snowfall, Sunwapta River, Jasper National Park, Alberta, Canada
Mixed coniferous and deciduous forest after snowfall in autumn, Wells Gray Provincial Park, British Columbia, Canada  -  Jeff Foott
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Jeff Foott / Mixed coniferous and deciduous forest after snowfall in autumn, Wells Gray Provincial Park, British Columbia, Canada
Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada  -  Jeff Foott
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Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada
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