Conservation

Hippos respond differently to the calls of familiar and unfamiliar hippos.

Conservation efforts are starting to pay off for unique tree-climbing lions in Uganda's Queen Elizabeth National Park, says one conservationist.

World leading naturalist E.O. Wilson has passed away at the age of 92. He was known as "Darwin’s natural heir" and the world's top authority on the study of ants.

Taiwan is racing to contain an outbreak of invasive cane toads, which likely escaped from a black market breeder.

Authorities at Colombia's airport in Bogotá found and confiscated hundreds of arthropods that German travelers had illegally collected and stashed in a suitcase.

New Zealand's long-tailed bat recently earned a very unlikely accolade.

Australian wildlife officials are planning to kill or remove more than 10,000 wild horses from a national park in New South Wales.

Genetic analysis recently showed that California condors can reproduce asexually.

The U.S. Fish and Wildlife Service has removed 23 species from the endangered species list because they have most likely gone extinct.

One of the Southern Resident orcas, a 47-year-old female known as L47, hasn't been seen by census takers since February.