SAN DIEGO (Feb. 8, 2023) – San Diego Zoo Wildlife Alliance today received a GUINNESS WORLD RECORDS^TM title for Oldest Living Mouse in Human Care recognizing “Pat,” a Pacific pocket mouse fondly named after actor Sir Patrick Stewart. Pat was born July 14, 2013 at the San Diego Zoo Safari Park, in the first year of the organization’s Pacific pocket mouse conservation breeding and reintroduction program. Today, he is 9 years and 209 days old. The GUINNESS WORLD RECORDS title is a win for all the tiny but mighty—and often overlooked—species around the world that play an important role in their ecosystems.