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.

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

Tilly, a river otter that was euthanized at the age of ... on NBC’s TV series “30 Rock,” officials said. Although they used to be threatened by hunters wanting their fur, river otters ...