A new study — the first of its kind — finds that the world’s conservation areas fail to protect hundreds of rare cactus species.

Researchers have identified a new tree species in Cameroon, but it only grew in a landscape that has now been destroyed by agriculture.

The extinction of the Christmas Island flea — and the current risk to other parasites — shows a major gap in conservation efforts.

At least 95 percent of Madagascar’s beloved primates are now at risk, conservationists warn.

Experts worry this booming trade could doom the big cats in the wild.

Only one male has turned up at the birds’ breeding grounds this year — and he’s too young to breed.

Conservationists have helped to save North America’s largest bird from extinction, but it’s still important to give every chick a chance to fly free.

The fungus that causes white-nose syndrome continues its deadly spread west — but a meeting of bat researchers reveals cause for hope.

New research shows that 2,000-year-old baobab trees are suddenly dying. New trees won’t have a chance, either.

This small, flightless bird, native to an atoll in the Pacific, went extinct as a direct result of World War II.