Common in San Francisco into the early 1900s, the Pacific Chorus Frog, Pseudacris regilla, was recently on the brink of existence in San Francisco. A local Bay Area conservationist saved the last remaining population of Pacific Chorus Frog in a degraded wetland behind an industrial building at the base of Potrero Hill. Since then, a local grassroots restoration effort has succeeded in reintroducing the “San Francisco Tree Frog” to many wetland habitats throughout the city, including the Presidio, Golden Gate Park, and many backyards. The Pacific Chorus Frog which ranges from Alaska to southern California, is famous of course because Hollywood movies use its “ribbit” sound for all of those sultry nighttime scenes. More Chorus frogs mean more frog song and mosquito control!