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

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

SANTA ROSA COUNTY, Fla. (WKRG) — Officials at the Gulf Breeze Zoo are inviting visitors to see its newest resident: Chibuzo, ...

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