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Douglas Squirrel of Crater Lake National Park
...This animal, also known as the gray digger, was noticed by Art C. Toth, foreman of the fire guards, who brought it to Park Headquarters to be added to our mammal collection. Although these
ground squirrels have been observed occasionally along the western and southern boundaries of the park, the only other collection was made in 1937 at the south entrance.
The gray digger lives principally in sagebrush areas of the Upper Sonoran Zone and open forests of the Transition Zone. Somewhat similar to the silver gray squirrel, Sciurus
griseus griseus Ord, which is rare within the Park, the gray digger is distinguished by his less bushy tail and the conspicuous black patch which extends
from between the shoulders to the middle of his back. In addition, the silver gray squirrel usually stays fairly high in the trees, while the ground squirrels rarely climb more than a few feet off the
ground....read more....
Nature Notes From Crater Lake
The Squirrel And His Relatives - Ray Coopey, 1935
Ground Squirrel Activity at Rim Village - Roger Brandt, 1993
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