Once plentiful across Asia, Sumatran rhinos have steadily declined in recent decades.
An endangered species is defined by the U.S. Fish & Wildlife Service as "an animal or plant species in danger of extinction throughout all or a significant portion of its range." In the United States, these animals can be listed under and protected by the Endangered Species Act. Endangered Species in the United States include the black-footed ferret and the California red-legged frog. The International Union for Conservation of Nature also keeps a Red List of Threatened Species, the most widely recognized list of endangered and threatened species. On this list, for example, are all the surviving subspecies of tiger, which range from endangered to critically endangered.
A juvenile macaque from the new group started grooming the injured monkey, then adults followed suit.
Tigers are the biggest cats in the world, but their populations are struggling. With only 3,200 left in the wild, there are now more living in captivity than in the wild.
Giant pandas, known for their distinctive markings and playful personalities, are considered China's national treasure.
Teams in Washington and Canada are working together to save Scarlet, a starving 3-year-old killer whale.
A mission meant to save critically endangered rhinoceroses by transferring them to a wildlife sanctuary in Kenya has ended in tragedy. And now we know why.
A pride of hungry lions in a South African reserve just saved the day, at least for a herd of rhinos.
Yo'oko, a male jaguar (Panthera onca) once known to roam the Huachuca Mountains in southern Arizona, was probably killed by a mountain lion hunter.
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