For more than 10 years, the San Diego Zoo Wildlife Alliance has led an effort to bolster the population of a threatened species, the mountain yellow-legged frog. But as the zoo’s facilities have ...

SAN DIEGO — The San Diego Zoo Wildlife Alliance is taking steps to ensure an endangered species doesn’t go extinct. The alliance, in collaboration with Omaha’s Henry Doorly Zoo and Aquarium, have ...

Birch Aquarium at the Scripps Institution of Oceanography at UC San Diego marked the occasion as its first ever species reintroduction. The frogs were released into the San Bernardino Mountains in a ...

The scientist traipses to a pond wearing rubber boots but he doesn’t enter the water. Instead, Brad Hollingsworth squats next to its swampy edge and retrieves a recording device the size of a deck of ...