Uploaded December 2018 | Updated September 2026, 4 minutes ago

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Historically, mountain yellow-legged frogs thrived throughout the Sierra Nevada, but today these endangered amphibians are found in only a handful of locations. Restoration efforts in Yosemite are helping protect what was once the most abundant vertebrate in the park.

(Audio-described version: youtu.be/uOkc7aMIV0Y)