Felis Images / Asiatic lion (Panthera leo persica), female and cubs in morning light, cub biting mother's leg. Gir National Park, Gujarat, India. Photo Phillip Ross/Felis Images
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Suzi Eszterhas / Leopard (Panthera pardus) five-week-old cub playing with mother's tail, Jao Reserve, Botswana
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Suzi Eszterhas / Leopard (Panthera pardus) five-week-old cub playing with mother, Jao Reserve, Botswana
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Daniel J. Cox / Gray Wolf (Canis lupus) predating female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 4 of 4
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Daniel J. Cox / Gray Wolf (Canis lupus) killing female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 3 of 4
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Daniel J. Cox / Gray Wolf (Canis lupus) attacking female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 2 of 4
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Daniel J. Cox / Gray Wolf (Canis lupus) pair predating female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 1 of 4
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Chien Lee / Orchid Bee (Euglossa sp) sleeping by biting leaf, Utria National Park, Colombia
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Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) five year old juvenile female, named Fadhila, playing with her three year old brother, named Fifty, Gombe National Park, Tanzania
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Frederique Olivier / Young Burchell's zebra (Equus burchellii) playing, biting and kicking its mother, Serengeti NP, Tanzania.
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Igor Shpilenok / Red fox (Vulpes vulpes) cub biting tail of adult male, Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East. June.
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Neil Aldridge / Plain's zebra (Equus quagga) biting the neck of a rival during a fight Hluhluwe imfolozi Park. South Africa.