We report the first records of the western gray squirrel (Sciurus griseus) from Modoc County and eastern Lassen County in northeastern California. Specimens from Modoc County represent the first records of the species from the Great Basin geographic province. We conclude that these records represent a range expansion based upon previous fieldwork that did not report the species in the region.
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1 July 2010
Range Expansion of the Western Gray Squirrel (Sciurus griseus) in Northeastern California
John O. Matson,
William F. Laudenslayer Jr.,
Stephanie A. Trewhitt,
Mary Flores
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Western North American Naturalist
Vol. 70 • No. 2
July 2010
Vol. 70 • No. 2
July 2010
Great Basin
range expansion
Sciurus griseus
Warner Mountains
western gray squirrel