Amphibians
Larch Mountain Salamander
Plethodon larselli · also called Larch Mountain salamanders
A Larch Mountain salamander shelters deep within a patch of volcanic talus in the Columbia River Gorge, safe within the rock rubble it depends on entirely. Step just a short distance beyond where the talus ends, and suitable habitat for this species simply disappears.
Overview
The Larch Mountain salamander, Plethodon larselli, is a lungless amphibian native to volcanic talus habitat across parts of the Columbia River Gorge region of Oregon and Washington. Its extremely specific rock-rubble habitat requirement makes its actual usable range considerably smaller and more fragmented than its overall regional distribution suggests.
A species defined by rock, not just region
Rather than occupying a broad forested area, the Larch Mountain salamander’s real habitat consists of scattered talus patches within that region, meaning its true range is a fragmented patchwork of rock rubble rather than any single continuous stretch of forest.
Status
Vulnerable — facing ongoing pressure from logging, road construction, and quarrying that can disturb its specific talus habitat requirements.
Larch Mountain Salamander: common questions
Why is the Larch Mountain salamander so dependent on talus?
The Larch Mountain salamander shows a strong dependence on talus slopes formed from volcanic rock, relying on the deep spaces between rock fragments for shelter, moisture retention, and protection from surface temperature extremes that the lungless species could not otherwise tolerate on exposed ground.
Why can the Larch Mountain salamander's habitat end so abruptly?
Because the Larch Mountain salamander depends on specific talus rock formations rather than forest habitat generally, suitable habitat can end abruptly within a short distance wherever the talus itself gives way to different terrain, meaning the species' actual usable range is considerably smaller and more fragmented than its broader geographic range might suggest.
What threatens the Larch Mountain salamander?
Larch Mountain salamander populations face conservation concern due to logging, road construction, and rock quarrying, all of which can disturb or eliminate the specific volcanic talus habitat patches the species depends on across its already fragmented range within the Columbia River Gorge region.
Where does the Larch Mountain salamander live?
The Larch Mountain salamander is native to talus habitat across parts of the Columbia River Gorge region spanning Oregon and Washington, restricted specifically to pockets of suitable volcanic rock rubble within this broader forested region.