Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.
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Mark Raycroft / Pronghorn Antelope (Antilocapra americana) running in winter, North America
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Mark Raycroft / Pronghorn Antelope (Antilocapra americana) running in winter, North America
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Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers,superbloom, Antelope Valley, California
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Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers,super bloom, Antelope Valley, California
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Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers, super bloom, Antelope Valley, California
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Jeff Foott / Turret Arch in winter, La Sal Mountains, Arches National Park, Utah
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Jeff Foott / Marching Men sandstone formation, Arches National Park, Utah
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Jeff Foott / Winding road and sandstone formations, La Sal Mountains, Arches National Park, Utah
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Colin Monteath/ Hedgehog House / Icebergs in winter in lake, Hooker Glacier, Mount Cook, Mount Cook National Park, New Zealand
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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...
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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.)
