Photograph by Melissa FarlowTwo rearing stallions appear locked in a combative embrace as they battle for the right to mate with the mares of a wild herd.
Photograph by Michael NicholsIn a playful pulling match, two baby African elephants test the strength of their trunks (which contain approximately 100,000 muscles).
Photograph by Ian NicholsA 300-pound silverback western lowland gorilla announces his presence—and dominance—with chest beatings and a low, booming roar.
Photograph by Robert ThomasA well-defended porcupine pauses on a riverbank. Porcupine quills are barbed, and tend to work their way deeper into flesh over time if not extracted.
Photograph by Paul NicklenA female leopard seal hunts down a penguin, then offers her kill to the photographer before diving to consume her prey. Leopard seals grow to more than ten feet long, making them the most powerful hunters of all seals—and one of Antarctica's chief predators.
Photograph by Chris JohnsA Culex mosquito perches near the eye of an 'i'wi, a bird native to Hawaii. The insects have spread deadly avian malaria across the state, devastating Hawaii's bird populations.
Photograph by Darlyne MurawskiA carnivorous caterpillar uses its grappling limbs to seize a fruit fly in a tight embrace.
Photograph by Michael NicholsCaptive born, these two young Bengal tigers could not survive if released into the wild. Yet they still share much with their wild counterparts, including a love of play-fighting.
Photograph by Randy OlsonA brown bear goes fishing—successfully—for spawning Pacific salmon in Kamchatka’s Kurilskoye Lake.
African Wild Dog
Photograph by Chris JohnsSpattered with blood, an African wild dog pauses from feasting on his kill to scan for members of his pack, which join in on the meal after the hunt leader enjoys the privilege of dining first.
Fuente: National Geographic