The Milwaukee Zoo mourns the loss of Patti, the oldest hippo in U.S. zoos, who was known for her spirited personality.

In case you can't get enough of the little pygmy hippo Moo Deng from Thailand, there's now an official song featuring the ...

Patti was humanely euthanized on Sunday, Nov. 10. According to a statement from the zoo, 55-year-old Patti — who was ...

Moo Deng fans have something to sing... er, I mean cheer... about. That's because the Khao Kheow Open Zoo in Thailand where ...

A river hippopotamus at the Milwaukee County Zoo was humanely euthanized on Sunday, Nov. 10. Patti marked her 55th birthday ...

Officials at the Gulf Breeze Zoo are inviting visitors to see its newest resident: Chibuzo, a baby Nile hippopotamus.