SAN DIEGO, PALM DESERT, Calif. (April 15, 2024) – Seventy critically endangered Mojave desert tortoises have successfully emerged from their winter burrows after being reintroduced into their native habitat on Edwards Air Force Base in Southern California. San Diego Zoo Wildlife Alliance and The Living Desert Zoo and Gardens, the global authority on desert plant and wildlife conservation, are working in partnership with Edwards Air Force Base, the U.S. Fish and Wildlife Service and the U.S. Geological Survey, using headstarting techniques designed to increase the survival rate for young tortoises. The cohort of young tortoises was the first in the program to be reintroduced into the wild after receiving a combination of an indoor- and outdoor-rearing. Within 24 hours of reentering their native habitat, the tortoises were exhibiting positive natural behaviors by constructing new burrows or modifying existing burrows for shelter. Now, six months later, they have emerged after winter brumation—a state of deep sleep specific to reptiles—and are spending more time basking at burrow entrances. Scientists are currently conducting health assessments and replacing radio transmitters on the tortoises to continue monitoring their success and better understand the juvenile age class.

Leap Day only happens once every four years. Explore which extraordinary wildlife leap, jump, spring, and everything in between.

LA JOLLA, Calif. (Feb. 26, 2024) – Love is in the water for the critically endangered Sunflower Sea Star as a team in California successfully spawned and cross-fertilized gametes from a male and a female, resulting in fertile eggs. This success marks another incredible step forward in an ongoing collaborative effort to save the species from extinction. This advancement took place at Birch Aquarium at Scripps Institution of Oceanography at UC San Diego, where their experts were joined by partners from the Aquarium of the Pacific, California Academy of Sciences, San Diego Zoo Wildlife Alliance (SDZWA) and Sunflower Star Laboratory. 

SAN DIEGO (Jan. 30, 2024) – San Diego Zoo Wildlife Alliance and San Diego State University (SDSU) are joining forces to usher in a new way of studying snakes. In a collaboration between San Diego Zoo Wildlife Alliance and Rulon Clark, Ph.D., professor of biology at SDSU, biologists are tagging wild rattlesnakes with external transmitters and accelerometers. Previously, telemetry devices on snakes had to be surgically implanted—severely limiting this area of study. San Diego Zoo Wildlife Alliance and SDSU are among the first to use acceleration technology to study snakes.

SAN DIEGO (Jan. 19, 2024) – Three baby spider monkeys confiscated at the United States-Mexico border are now safely with the wildlife care specialists at San Diego Zoo Wildlife Alliance.

African penguins and California least terns share marine habitat challenges.

SAN DIEGO (Jan. 1, 2024) – Today San Diego Zoo Wildlife Alliance participated in the 135th Rose Parade^® presented by Honda with a float celebrating the San Diego Zoo’s 107-year history. The float themed “It Began With a Roar” depicted iconic wildlife from the Zoo, including Rex the lion, whose mighty roar sparked a dream more than a century ago and inspired the world-renowned San Diego Zoo. 

Local students are discovering the importance of collaboration and teamwork in wildlife conservation.

SAN DIEGO (Dec. 13, 2023) – San Diego Zoo Wildlife Alliance, the University of California, Davis (UC Davis) Karen C. Drayer Wildlife Health Center, and the California Department of Fish and Wildlife recently rescued three orphaned mountain lion cubs. The cubs—approximately 6 weeks old at the time of their rescue—were each found separately following an extensive search over the span of a week. Each cub was treated in the field for dehydration before being taken to Paul Harter Veterinary Medical Center at the San Diego Zoo Safari Park. Because the young lions were orphaned at an early age, they cannot be safely reintroduced into their native habitat. The California Department of Fish and Wildlife designated the San Diego Zoo Safari Park as a safe haven for the rescued cubs, offering them a second chance and lifelong care.

SAN DIEGO (Nov. 14, 2023) – San Diego Zoo Wildlife Alliance, in collaboration with Omaha’s Henry Doorly Zoo and Aquarium, reintroduced more than 70 endangered mountain yellow-legged frogs into a lake located in the San Bernardino Mountains. This release marks the first time the Southern California distinct population segment of the mountain yellow-legged frog has been reintroduced into a lake instead of a mountain stream. The frogs were bred at San Diego Zoo Wildlife Alliance’s Beckman Center for Conservation Research between 2020 and 2022, and then reared at Omaha’s Henry Doorly Zoo and Aquarium. The cross-country effort to save this California frog is part of a robust conservation breeding and reintroduction research program aimed at restoring populations of this declining species throughout its historic range.