Patagonian grey fox (Dusicyon griseus griseus) defending his killed prey, Torres del Paine National Park, Patagonia, Chile, South America

Swift fox (Vulpes velox) kit climbing on the vixen, Pawnee National Grassland, Colorado, United States of America, North America

Swift fox (Vulpes velox) vixen heading out to hunt, Pawnee National Grassland, Colorado, United States of America, North America

Grey-headed Flying Fox, (Ptereopus poliocephalus), Botanical Garden, New South Wales, Sydney, Australia

Greyrocky beach in Okarito along the road between Fox Glacier and Greymouth, South Island, New Zealand, Pacific

Grey-headed flying fox (Pteropus poliocephalus), Yarra Bend Park, Melbourne,Victoria, Australia, Pacific

Greyrocky beach in Okarito along the road between Fox Glacier and Greymouth, South Island, New Zealand, Pacific

Patagonian grey fox (Dusicyon griseus griseus) defending his killed prey, Torres del Paine National Park, Patagonia, Chile, South America

Bat-eared fox (Otocyon megalotis), Serengeti National Park, Tanzania, East Africa, Africa

Patagonian grey fox (Dusicyon griseus griseus), Torres del Paine National Park, Patagonia, Chile, South America

Adult Andean fox (Lycalopex culpaeus) near its den in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Adult Andean fox (Lycalopex culpaeus) near its den in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Gillespies Beach, near Fox Glacier, West Coast, South Island, New Zealand, Pacific

An adult bat-eared fox (Otocyon megalotis), Serengeti National Park, Tanzania, East Africa, Africa

A pair of bat-eared foxes (Otocyon megalotis), Serengeti National Park, Tanzania, East Africa, Africa

Euthanased female grey headed flying-fox (Pteropus poliocephalus) with self mutilation injuries, Midginbil, New South Wales, Australia, Pacific

Unviable damage to right wing of grey-headed flying-fox (Pteropus poliocephalus) following barbed wire entanglement, Murwillumbah, New South Wales, Australia, Pacific

Male grey-headed flying-fox (Pteropus poliocephalus) with electrocution burns to both wrists and thumbs, Hopkins Creek, New South Wales, Australia, Pacific

Unviable damage to right wing of grey-headed flying-fox (Pteropus poliocephalus) following barbed wire entanglement, Murwillumbah, New South Wales, Australia, Pacific

Baby grey-headed flying-fox (Pteropus poliocephalus) with dummy, Hopkins Creek, New South Wales, Australia, Pacific

Juvenile grey-headed flying-fox (Pteropus poliocephalus) wearing protective jacket to support fixated fractured radius, Hopkins Creek, New South Wales, Australia, Pacific

Gray fox (Urocyon cinereoargenteus), kit, nine weeks old, looking out of a tree trunk, Montana, USA, North America

Grey Zorro (Pseudalopex griseus), peninsula Valdes, Patagonia, east coast, Atlantic Ozean, Argentina, South America

Grey Zorro (Pseudalopex griseus), peninsula Valdes, Patagonia, east coast, Atlantic Ozean, Argentina, South America

Gray foxes (Urocyon cinereoargenteus), two kits, nine weeks old, looking out of a tree trunk, Montana, USA, North America

portrait of a cross fox in the snow

Patagonian Grey Fox, Torres del Paine National Park Patagonia, Chile

Patagonian Grey Fox, Torres del Paine National Park Patagonia, Chile

Gray Fox (Urocyon Cinereoargenteus), Utah, Usa

Young South American Grey Fox , Torres del Paine Chile

Red fox (Vulpes vulpes) catching an eastern grey squirrel (Sciurus carolinensis), Montreal Botanical Garden. Quebec. Canada

Eastern grey squirrel (Sciurus carolinensis) perched on a branch and watching. A case of melanism. This squirrel is a grey squirrel with a defective pigment gene given by the fox squirrel (Sciurus niger), which makes the colour of its fur darker. Mauricie region. Quebec. Canada