BRAD Hollingsworth crouches at the edge of a pond in Southern California, rubber boots sunk into the mud, but he doesn't step ...

THE SANTA ROSA PLATEAU ECOLOGICAL RESERVE, Calif. — 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 ...

Put a microphone outside overnight in Southern California not far from the urban sprawl, and you might be surprised how much you can hear. (SOUNDBITE OF ANIMAL HOWLING) SUMMERS: But for scientists ...

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 ...

A species of frogs in Southern California whose future was once uncertain may have hope for survival in the wild thanks to a multi-agency breeding and reintroduction program. More than 70 endangered ...