Recovery Plan Released for Endangered Southern California Frog.
Since the 1900s mountain yellow-legged frogs have disappeared from nearly all of their former range in Southern California. By the 1990s fewer than 100 were thought to remain, in a handful of isolated headwater streams. Predation by introduced fish, primarily rainbow trout, is one of the best-documented causes of the frogs’ decline. Another threat is habitat damage from recreation.
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