An outbreak has killed 20 condors in the Southwest, putting wildlife conservationists on high alert.

New research shows that these ecosystem engineers can be an “ally in stopping the decline of biodiversity.”

At least 33 animals and 39 plants are extinct in the wild. But research suggests there is hope for restoring wild populations.

A bounty of much-needed new federal funds will help reconnect habit for freshwater and terrestrial animals.

For Ukrainian activists, rescuing the dogs of war — not to mention the cats, swans, bats, bears and other wildlife — often means putting their own lives on the line.

As one of the world’s most endangered birds returns to its ancestral skies, partners work to eliminate a persistent threat on the ground.

Recovering urban wildlife isn’t just about protecting a city’s parks and rivers, but also making its streets, homes and skyscrapers greener.

Experts say new international trade restrictions will help, but they leave several problems unsolved.

This will be a critical year for several endangered and threatened species, as well as a time of opportunity for others.

Saving endangered species sometimes means knowing where they used to live — before scientists started studying them. For that, we need historical ecologists.