Instead, round-the-clock care from her keepers has helped her get to her first Hippo Day. Here's to many happy hippo days ahead, Fiona. Update, 2:20 p.m., Friday, Feb. 10: Cincinnati Zoo ...

Today, Fiona is happy, healthy and hefty. She will celebrate her first birthday on Jan. 24, and she is the smallest hippo on record to have ever been born and survive.

Happy, the National Zoo’s only Nile hippo was born on Jan. 4, 1981. The staff named him for the "Happy New Year" they had just celebrated. Nile hippos can live up to 45 years in the wild and ...

"It is incredible. A-less-than-a-year-old hippo has adopted a male tortoise, about a century old, and the tortoise seems to be very happy with being a 'mother'," ecologist Paula Kahumbu said.

That window allows visitors the see the 39-year-old, 5,300-pound Happy the hippo floating, swimming, gawking back at people nose-to-nose and, finally, living up to his name. When the exhibit was c ...

After a rough start for the prematurely-born Fiona, the happy hippo family reunited in what zookeepers called a "fairytale ending.' But then, for no apparent reason, Henry lost his appetite in July.

Each bespoke Hungry Hippos set will come with four handwritten books bound in full-grain leather, depicting a complex narrative detailing the intersecting lives and journeys of Happy Hippo, Henry ...

It was tough to get good images myself since I wasn't in the water, but I captured the fun experience on video. I appreciate the happy, hippo lovers sharing their best pics for this story including ...