LOS ANGELES, SAN DIEGO, and PORTLAND, Ore. (Oct. 16, 2023) – The U.S. Fish & Wildlife Service (Service) is sharing early results from the historic vaccine trial for highly pathogenic avian influenza (HPAI) in California condors (Gymnogyps californianus). As reported by the Service’s Incident Command leading the effort, results from the first test group showed that 60% of the condors produced measurable antibodies that are expected to provide partial protection against mortality from HPAI if the birds are exposed. 

SAN DIEGO (Oct. 12, 2023) – Two critically endangered Sumatran tiger cubs emerged from their den today at the San Diego Zoo Safari Park. The cubs, born July 12, stepped out to explore their outdoor habitat, much to the delight of wildlife care staff and volunteers. 

Andean bear twins at the San Diego Zoo are a double dose of hope for this vulnerable species.

SAN DIEGO (Sept. 7, 2023) – The world’s second successfully cloned Przewalski’s horse is thriving at his home at the San Diego Zoo Safari Park. The foal, born Feb. 17, 2023, and his surrogate mother, a domestic quarter horse, were recently moved from his birthplace at ViaGen Pets & Equine cloning facility in Texas so he can learn the language of being a wild horse from his own species. 

The second-ever Przewalski's horse clone has arrived to his new home at the Safari Park.

SAN DIEGO (July 27, 2023) – San Diego Zoo Wildlife Alliance is celebrating the birth of two Sumatran tiger cubs—the first of this critically endangered species to be born at the San Diego Zoo Safari Park’s Tull Family Tiger Trail habitat in seven years. Their birth also comes just in time for Global Tiger Day. With only an estimated 400 to 600 Sumatran tigers remaining on Earth, the births are significant in increasing the worldwide population of this tiger species and furthering the nonprofit conservation organization’s ongoing work to conserve them.

SAN DIEGO (July 13, 2023) – After more than two years of dedicated work, San Diego Zoo Wildlife Alliance conservationists are achieving success breeding a critically endangered coastal bird: the milky stork. This breeding program is part of an 11th-hour effort with the Association of Zoos and Aquariums Taxon Advisory Group (AZA TAG) to assist the last remaining individuals of the species living in North America—helping them successfully reproduce, and bolster the world’s population of milky storks. 

It takes an innovative, comprehensive approach to bolster Hawaiian bird populations and ensure their future.

SAN DIEGO (June 6, 2023) – Researchers are currently tracking over 40 wild ‘io, also known as Hawaiian hawks, on Hawai‘i Island with lightweight, solar-powered GPS transmitters. This work is part of a collaborative effort to conserve this beloved species and one of its natural prey—the ‘alalā. Researchers with San Diego Zoo Wildlife Alliance and the State of Hawai‘i Department of Land and Natural Resources – Division of Forestry and Wildlife are collaborating on this effort as part of a large-scale GPS tracking program to better understand the extent to which ‘io move across the island and how they utilize different habitats. With the new insights that are gathered, scientists will be better equipped to conserve this iconic raptor, and simultaneously glean critical insights to aid in the future reintroduction of the ‘alalā, also called the Hawaiian crow, to their native habitats. The aim is to ensure that both ‘alalā and ‘io can coexist in their native habitats, as they previously did for many years.

Take a closer look at how we're rebuilding sustainable populations of critically endangered wildlife in the Pacific.