One of the last five northern white rhinoceroses in the world has died. Three females and one male are left.
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.
The black leopard of the Malaysian Peninsula actually has hidden leopard spots, which can be revealed using infrared cameras.
A company is making synthetic rhino horn in order to flood the market and drop the price, thereby reducing demand, but some conservationists say the approach could backfire.
Only five northern white rhinoceroses are left on Earth. Can reproductive technology save a subspecies driven to near extinction?
Just five northern white rhinoceroses remain in the wild. And chances of them breeding, without human intervention, to bring numbers back up are slim.
The bristly, sex-crazed antechinus has two previously unknown species in its family, a new study finds.
A morbidly maternal wasp, a crop-circle-creating pufferfish and an acrobatic arachnid are among the bizarre and awe-inspiring new species named in 2014, according to a new ranking.
Inbreeding is to blame for the decline in wolves at Isle Royale National Park, ecologists say, but climate change may be an indirect culprit in the population crash.
A rare leatherback turtle stranded on a remote South Carolina beach was released back into the wild today (March 12).
See photos of wildlife experts in South Carolina rescuing a stranded leatherback turtle on March 7, 2015.
For the first time, conservationists have spotted an Amur tiger dad leading his family along a snowy trail in Russia's Far East forests.
Great white sharks may have an even more delayed adolescence than humans, not reaching sexual maturity until they are in their second and third decades, new research shows.
Federal officials counted 109 wild Mexican wolves, or lobos, in the Southwest in 2014, up from 83 in 2013. It's the fifth year in a row the small population has grown in the United States.
The elusive and rare Sierra Nevada red fox has been spotted in Yosemite National Park for the first time in nearly a century.
Successfully combating the disease has been difficult, but a group has been exploring some new techniques that control the fungus using naturally occurring soil microbes.