For naked mole-rats, it’s one for all, and all for one.

SAN DIEGO (April 19, 2023) – Scientists are elated with the recent birth of the world’s second successfully cloned Przewalski’s horse, supporting the concept that cloning can be used as a viable tool for genetic rescue and contribute to new options for fostering resilience and genetic sustainability of endangered species. The foal, born Feb. 17, 2023 to a domestic surrogate mare, is a clone of a male Przewalski’s horse stallion whose living cell line was cryopreserved over 40 years ago in the San Diego Zoo Wildlife Alliance Biodiversity Bank’s Frozen Zoo^®.

Translocating 21 eastern black rhinoceroses in Kenya is no small feat, but it's a vital step on the road to recovery for this critically endangered species.

SAN DIEGO (March 28, 2023) – A birth of twins is exceptional, no matter the species. However, when those twins are Amur leopards—and fewer than 300 of those big cats are estimated to exist on Earth—the births are especially significant. This week, wildlife care staff at the San Diego Zoo announced the birth of two Amur leopard cubs, increasing this rare cat’s estimated worldwide population by two and furthering the nonprofit conservation organization’s ongoing work to save this vital Asian species.   

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. 

SAN DIEGO (Jan. 27, 2023) – Conservationists at the nonprofit San Diego Zoo Wildlife Alliance have announced the birth of a Przewalski’s horse —a critically endangered species of wild horse that was categorized as Extinct in the Wild until 1996. The foal is the first Przewalski’s horse born at the San Diego Zoo Safari Park since 2014, and is one of only four individuals born in North America over the past year.

The "Black Summer of Fire" in 2019-2020 was devastating for koalas in Australia's Blue Mountains. A collaborative recovery effort is underway.