ANGELES NATIONAL FOREST (KABC) -- Close to 1,000 mountain yellow-legged frogs and tadpoles were released into a tributary in the Angeles National Forest.
The Rana muscosa species was listed as endangered in 2002 due to habitat loss, pollution and introduction of non-native predators. The Los Angeles Zoo has been able to breed them.
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On Wednesday, the zoo worked with federal officials to release them into Cooper Canyon in the Angeles National Forest.
Since 2006, more than 3,800 captive-bred mountain yellow-legged frog tadpoles and sub-adult males have been released into their historical habitat in the San Gabriel, San Bernardino and San Jacinto mountains.
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This marks the second year tadpoles have been released into Angeles National Forest.