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

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.

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," ...

A zoo euthanized a “beloved” North American river otter after her health declined due to her age, Oregon zookeepers said. Tilly, a river otter that was euthanized at the age of 16, which is ...

A “beloved” river otter named Tilly was euthanized in Oregon, zookeepers said. Screengrab from Oregon Zoo A zoo euthanized a “beloved” North American river otter after her health declined ...