“Young river otters are extremely dependent on their mothers, and Tilly not only raised her own offspring but three other ...

Tilly, a river otter, came to the Oregon Zoo in 2009 as an injured and orphaned pup. She birthed four pups while at the zoo.

Two 6-week-old otter pups were discovered last week outside a Navy base building after their mother was killed by a car. They ...

Tilly, a 16-year-old river otter at the Oregon Zoo known for being "Mom of the Year" and a cameo on the NBC show "30 Rock," ...

This week, the Animal Health and Animal Science teams performed quick exams of three North American river otter pups so that ...

MADISON, Wis. -- The Henry Vilas Zoo recently welcomed two new members to its family. The zoo announced Wednesday that two North American river otter pups, female Ginger and male Wasabi, were born on ...

The Oregon Zoo said goodbye to a member of the otter family Wednesday. Tilly, the zoo’s oldest North American river otter, ...

This is a very sad time, especially for Tilly’s care staff,” said Jen Osburn Eliot with the Oregon Zoo, in a statement.

Three North American river otter pups at Zoo Miami are growing quickly and thriving under the care of their mother, Zinnia, according to Ron Magill, the zoo’s communications director.

North American river otters typically weigh up to 35 lbs ... for safety reasons as they learn to walk and swim. “Once the pups can swim safely, we can begin introductions with Stark,” Puntillo ...

Last month, the Monterey Bay Aquarium announced the addition of a new resident sea otter, Opal. After much anticipation, she ...