Long before modern otters became symbols of playful behavior, a much larger version existed. Fossil evidence points to an otter species that reached the size of a lion and occupied the role of a ...

It's no secret that River otters are insanely adorable. They are also very playful little creatures. Unsurprisingly, many people often call them river "puppies." But as playful and rambunctious as ...

The unlikely security camera footage reveals that unlike 20 years ago, these charming riverine mammals are no longer rare.

New research from the Smithsonian Environmental Research Center in Edgewater on river otter feces in the Chesapeake Bay makes revelations about the animal’s diet, the ecological role of parasites and ...

When people talk about sea otters, the words “cute,” “cuddly,” and “curious” often come to mind. But now you can add another descriptor to that list -- climate change fighters. Along the West Coast ...

Otters are well known for their playful, energetic, and inquisitive behavior. However, did you know that otter play has a purpose other than just having fun? Or that otters are some of the most ...

A family of giant river otters was released into the Iberá National Park in northeast Argentina on July 1. The endangered species, with no known breeding populations in Argentina over the past 40 ...