More than 16,000 American bullfrogs, larvae and egg masses were removed from Yosemite National Park over a six-year period.

In our Endangered Animals lesson, students will discover what it means to be at risk for extinction and about currently ...

More than 90% of popular freshwater game fish in Southern California contained an introduced parasite capable of infecting ...

Cleaning English ivy along the North Ridge Trail; viewing synchronous fireflies on June 8, and more activities are planned.