Newly released photos from the Bronx Zoo Archives include an intriguing portrait of Sultan, a Barbary lion.
Arizona biologists share the first video images of the only known jaguar in the US in hopes of saving him and his home.
In the Pacific Northwest, scientists are wondering why so many of one clan’s calves are turning out to be boys.
A new study reveals how dazzling sea slugs selectively stockpile poison to kill their enemies.
New photo trap images from Panama give a tantalizing glimpse of these cat-sized dogs of Central and South America.
Experts weigh in on why chubby wild squirrels are being spotted and photographed in several countries.
In a place that welcomes hyenas after dark, an anthropologist ends up bonding with one of the fiercest predators on earth.
A new ruling from the US Fish and Wildlife Service adds lion protections under the Endangered Species Act.