Four rare Western Santa Cruz Galalapos tortoise hatchlings will go on public view at Philadelphia Zoo starting April 23.

Siku, a polar bear at Lincoln Park Zoo, developed allergies to various substances including human hair dander (Credit: ...

The new habitat is home for the zoo’s two jaguars, Caipora and Saban, and the mountain lion Mystic. Here's a sneak peek of 'Big Cats of Arizona' before its grand opening.

A zookeeper and her gorilla friend, who welcomed their babies into the world just 10 days apart, introduced the two infants in a heartwarming moment for the new mothers.