Conservation biologist John Ewen discusses the recent reintroduction of Tasmanian devils to mainland Australia after a 3,000-year absence and issues that need to be considered when bringing long-departed animals back into an area.

This hammer-headed fruit bat is wearing a GPS tracker deployed by researchers with the Wildlife Conservation Society.

Conflict threatens already at-risk wildlife populations and conservation efforts in war-torn areas.

The latest IUCN Red List update also reveals substantial declines in antelopes and other species, but some level of recovery in populations of snow leopards.

See the volunteers and veterinarians who are helping to rehabilitate wayward penguins that wash up on the coast of Brazil.

Bat populations ravaged; hundreds of amphibian species driven to extinction; diverse groups of birds threatened. Taking risks will be necessary to control deadly wildlife pathogens.