California Red-legged Frog Numbers on the Rise at Muir Beach

Close-up look at portion of a California red-legged frog egg mass, with tiny dark tadpoles growing in the centers of clear, gelatinous eggs.
California red-legged frog eggs

NPS / Paul G. Johnson

May 2017 - Every winter, California red-legged frogs (Rana draytonii) egg masses are monitored in ponds and streams at Muir Beach and other sites in the Golden Gate National Recreation Area. Recent restoration efforts at Muir Beach, complimented by the relocation of red-legged frog egg masses to the site, seem to be paying off for this threatened species. The past two years have seen the highest egg mass numbers since monitoring began at this site in 2002.

Increased numbers of egg masses have also been seen at monitoring sites in Tennessee Valley, Rodeo Valley, and Rancho Corral de Tierra this season; however, egg mass production has declined at Mori Point since the winter of 2013.

Contact Darren Fong with questions.

Last updated: November 6, 2018