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The Douglas squirrel (Tamiasciurus douglasii) is a pine squirrel found in western North America, from the Pacific Northwest (including the northwestern coastal states of the United States as well as the southwestern coast of British Columbia in Canada) to central California, with an isolated subspecies in northern Baja California, Mexico.
Mearns's squirrel (Tamiasciurus douglasii mearnsi) is a subspecies of the Douglas squirrel endemic to Mexico. [2] It is endangered and occurs in low densities, and is threatened by habitat loss . [ 1 ] [ 3 ] It is possibly also threatened by competition from the eastern gray squirrel , which was introduced to the range of Mearns's squirrel in ...
The Douglas squirrel harvests and hoards great quantities of Douglas-fir cones, and also consumes mature pollen cones, the inner bark, terminal shoots, and developing young needles. [13] Mature or "old-growth" Douglas-fir forest is the primary habitat of the red tree vole (Arborimus longicaudus) and the spotted owl (Strix occidentalis).
Sciurini (/ s ɪ ˈ j uː r ɪ n iː /) is a tribe that includes about forty species of squirrels, [2] mostly from the Americas. It includes five living genera—the American dwarf squirrels, Microsciurus; the Bornean Rheithrosciurus; the widespread American and Eurasian tree squirrels of the genus Sciurus, which includes some of the best known squirrel species; the Central American ...
Douglas squirrel; M. Mearns's squirrel; ... Southwestern red squirrel This page was last edited on 20 August 2021, at 03:41 (UTC). Text is available under the ...
Douglas-fir seeds are an extremely important food for small mammals. Mice, voles, shrews, and chipmunks consumed an estimated 65 percent of a Douglas-fir seed crop following dispersal in western Oregon. The Douglas squirrel (Tamiasciurus douglasii) harvests and caches great quantities of Douglas-fir cones for later use. They also eat mature ...
The California ground squirrel (Otospermophilus beecheyi), also known as the Beechey ground squirrel, [4] is a common and easily observed ground squirrel of the western United States and the Baja California Peninsula; it is common in Oregon and California and its range has relatively recently extended into Washington and northwestern Nevada.
Eastern gray squirrel, Sciurus carolinensis introduced [5] Western gray squirrel, Sciurus griseus; Fox squirrel, Sciurus niger; Douglas squirrel, Tamiasciurus douglasii; American red squirrel, Tamiasciurus hudsonicus; Hoary marmot, Marmota caligata; Yellow-bellied marmot, Marmota flaviventris; Olympic marmot, Marmota olympus