San Diego Zoo’s Mouse Sets Guinness World Record for Longest Lifespan

"Pat," a Pacific pocket mouse located at the San Diego Zoo Safari Park was recognized as the oldest living mouse by the Guinness World Records on Feb. 8, 2023. Courtesy of the San Diego Zoo Wildlife Alliance

A Pacific pocket mouse that lives at the San Diego Zoo Safari Park was recognized earlier this month by Guinness World Records as the “oldest living mouse in human care” at 9 years and 7 months old.

The tiny mouse, affectionately called “Pat,” is named after famed actor Sir Patrick Stewart, according to San Diego Zoo Wildlife Alliance officials, who operate the zoo and safari park. Pat was born on July 14, 2013, at the zoo’s Pacific pocket mouse breeding center as part of its conservation breeding and reintroduction program.