Distribution

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Range Description

Boundy (2000) provided the most up-to-date description of the range, which has changed in recent years as a result of taxonomic revisions: in the USA from coastal southwestern Oregon south through north coastal California to the vicinity of the Russian River, thence southward along the coast and through the Coast Ranges and valleys to the northern edge of the Monterey Bay lowlands and the vicinity of Tres Pinos Creek in Santa Cruz and San Benito counties; distributed in the inner Coast Ranges from just north of Newville in Tehama County to the San Luis Reservoir drainage in Merced County; isolated populations occur in the Sacramento Valley at Sutter Buttes, Sutter County, and in riparian zones near the Sacramento River, and near Shasta Reservoir in Shasta County; distribution in the Sierra Nevada foothills extends from near Paradise, Butte County, south to Fiddletown, Amador County.

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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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