As streams dry up in the San Gabriel Mountains, biologists are searching harder for suitable areas to reintroduce a rare frog species.
Six biologists shouldered backpack coolers filled with 200 federally endangered frogs on Thursday morning and started trudging uphill across three miles of roadless wilderness on the northwestern flanks of the San Gabriel Mountains.
Like a person who has watched his neighborhood fall into ruin, Backlin said: “A lot of streams have been taken over by recreational activities or simply dried up. As a result, the frog populations also declined or vanished.”For centuries, Native Americans have visited Avi Kwa Ame, or Spirit Mountain, to seek religious visions and give thanks for the bounty of the Earth.
A mountain yellow-legged frog squirms in a plastic container. In 2002, when it was listed under the federal Endangered Species Act, fewer than 100 adult yellow-legged frogs remained in Southern California. In the mid-1960s, it would have been hard to imagine an amphibian less likely to face imminent extinction in the range, which is managed by the U.S. Forest Service and includes theBut since then, the frog named for the bright yellow that extends from the underside of its hind legs to its lower abdomen has been decimated by the appetites of nonnative trout, bullfrogs and crayfish, as well as shifting weather extremes.
Early attempts to breed the frogs had limited success. That’s because the most intimate details of their reproductive behavior remained a mystery until, the Los Angeles Zoo’s curator of reptiles, discovered how to transform a tiny building into a “frog shack” that mimics the frog’s life cycle of winter hibernation, spring thaw and mating season.
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