The Fort Worth Zoo is the only institution in North America to have successfully bred this critically endangered reptile for ...

While the San Diego Zoo and Safari Park are best known for rare and endangered animals such as giant pandas, koalas and ...

This year, the zoo flew 24,485 critically endangered Puerto Rican crested toad tadpoles out to repopulate their native wild ...

Cryopreserved samples from 18 endangered Nuttall's scrub oak trees were added to the San Diego Zoo Wildlife Alliance's Frozen ...

One notable success story is the cloning of Przewalski's horses, once extinct in the wild. Kurt, the first cloned ...

A critically endangered antelope species just got a little bigger thanks to the Houston Zoo. See the newest arrival and what ...

The zoo's Tropical Discovery exhibit is also home to mom Waffles and three males named Short-Stack, Denny and Flapjack. So ...

Marat, a Przewalski's horse foal at the Minnesota Zoo, fell critically ill shortly after his birth and was rejected by his ...