FRESNO, Calif., Aug. 17 (UPI) -- Attempts to reintroduce endangered yellow-legged frogs in California were derailed by the death of 104 frogs in a zoo's breeding tanks, zoo officials said.
Federal officials believe fewer than 200 of the federally endangered species of frog exist in the wild, the Los Angeles Times reported. Their natural habitat of the San Gabriel Mountains in California was fire-stripped in 2009, killing many of the frogs.