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USGS and partners released 653 critically endangered southern mountain yellow-legged frogs in summer 2026

USGS says it was the species’ largest release to date, part of an effort to rebuild populations in the San Gabriel Mountains.

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TLDR

USGS says its scientists and partners released 653 critically endangered southern mountain yellow-legged frogs into their native Southern California habitat in summer 2026, the species’ largest release to date. Scientists and zoo partners rear tadpoles and froglets in captivity, while USGS researchers study the frogs after release. According to USGS, the conservation effort has now reared and released more than 1,000 mountain yellow-legged frogs into the San Gabriel Mountains.

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1 Source, first seen 1h ago

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Combined views

2.4K

1 Source, first seen 1h ago

19 likes1 comments5 reposts
Close-up of a brown and green frog resting in shallow, clear water with ripples around it.

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1 Source

USGS@USGS🐸 653 frogs. One big step for a species fighting its way back. This summer, USGS scientists and partners released 653 critically endangered southern mountain yellow-legged frogs into their native habitat in Southern California, the largest release of the species to date. These frogs are part of a larger effort to rebuild populations in the San Gabriel Mountains, where the species has faced threats from wildfire, drought, disease, non-native predators and habitat loss. The work starts long before a frog reaches the mountains. Scientists and zoo partners rear tadpoles and froglets in captivity, then release them into carefully selected habitat. USGS researchers study the frogs after release to learn how they survive, grow and reproduce in the wild. That information helps scientists understand what it takes to establish healthy, self-sustaining populations. With this summer's release, more than 1,000 mountain yellow-legged frogs have now been reared and released into the San Gabriel Mountains as part of this conservation effort. It takes scientists, zoos and federal and state partners working together to give this endangered species a chance to recover. 📷 1: Endangered mountain yellow-legged frog (Rana muscosa). 📷 2: A newly released mountain yellow-legged frog. 📷 3: USGS biologists and partners climbing to a release site in the San Gabriel Mountains. 📷 4: Frogs in their transport containers waiting to be released. Credit: USGS #frogs #amphibian #SanGabrielMountains1h
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    USGS@USGS🐸 653 frogs. One big step for a species fighting its way back. This summer, USGS scientists and partners released 653 critically endangered southern mountain yellow-legged frogs into their native habitat in Southern California, the largest release of the species to date. These frogs are part of a larger effort to rebuild populations in the San Gabriel Mountains, where the species has faced threats from wildfire, drought, disease, non-native predators and habitat loss. The work starts long before a frog reaches the mountains. Scientists and zoo partners rear tadpoles and froglets in captivity, then release them into carefully selected habitat. USGS researchers study the frogs after release to learn how they survive, grow and reproduce in the wild. That information helps scientists understand what it takes to establish healthy, self-sustaining populations. With this summer's release, more than 1,000 mountain yellow-legged frogs have now been reared and released into the San Gabriel Mountains as part of this conservation effort. It takes scientists, zoos and federal and state partners working together to give this endangered species a chance to recover. 📷 1: Endangered mountain yellow-legged frog (Rana muscosa). 📷 2: A newly released mountain yellow-legged frog. 📷 3: USGS biologists and partners climbing to a release site in the San Gabriel Mountains. 📷 4: Frogs in their transport containers waiting to be released. Credit: USGS #frogs #amphibian #SanGabrielMountains1h
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