The Washington ground squirrel (Urocitellus washingtoni) is a squirrel found in the Pacific Northwest United States, in the states of Washington and Oregon. The species is listed as endangered in Oregon and is a candidate for endangered species listing in the United States, but is not currently listed. The IUCN formerly listed the species as vulnerable, but currently it is listed as near threatened.
The Washington ground squirrel lives in sagebrush or grassland habitats in the Columbia River Basin of Washington and Oregon. Washington ground squirrels hibernate / estivate 7–8 months each year. Adults breed shortly after emergence from hibernation in January or February and juveniles emerge from the natal burrow in March. Juveniles disperse away from the natal burrow and settle into new areas. All Washington ground squirrels gain weight and prepare for hibernation in late spring and early summer. Juveniles immerge for estivation in June or July, and adults begin estivating earlier, often in June.
One radiotracking study focused on dispersal of Washington ground squirrels. It found that 72% percent of juvenile males dispersed in April. Dispersal distances ranged from 40–3521 meters and the median dispersal distance was 880 meters. Twenty to 56% of radio-collared juvenile squirrels survived to estivation. Raptors and badgers were the primary causes of mortality. Survival rates of dispersers were higher than non-dispersers, mostly due to badger predation on natal sites.
Famous quotes containing the words washington, ground and/or squirrel:
“The government is huge, stupid, greedy and makes nosy, officious and dangerous intrusions into the smallest corners of life—this much we can stand. But the real problem is that government is boring. We could cure or mitigate the other ills Washington visits on us if we could only bring ourselves to pay attention to Washington itself. But we cannot.”
—P.J. (Patrick Jake)
“When the ground was partially bare of snow, and a few warm days had dried its surface somewhat, it was pleasant to compare the first tender signs of the infant year just peeping forth with the stately beauty of the withered vegetation which had withstood the winter ... decent weeds, at least, which widowed Nature wears.”
—Henry David Thoreau (1817–1862)
“The squirrel hoards nuts and the bee gathers honey, without knowing what they do, and they are thus provided for without selfishness or disgrace.”
—Ralph Waldo Emerson (1803–1882)