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.

A zoo euthanized a “beloved” North American river otter after her health declined due to her age, Oregon zookeepers said.

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," died April 30.

At 16, she was considered geriatric, with the average age for her species being 12.9 years for river otters that live in AZA-accredited zoos. Despite once being threatened due to fur trapping ...

American river otters were ubiquitous in most waterways across North America before the arrival of European settlers, the trust said. They were gone by the early 1900s — a casualty of fur ...

Zoo staff euthanized the 16-year-old otter Tilly, who had a cameo on NBC's '"30 Rock," following a decline due to her age, the Oregon zoo said.