Many of the most frequently sighted animals in Oregon  are small scavengers. Even in the most urban parts of the state, it’s possible to see raccoons, skunks, chipmunks, squirrels, and opossums.
West of the Cascades, the dark-colored Townsend’s chipmunks are among the most commonly encountered mammals; east of the Cascades, lighter-colored pine chipmunks and golden mantled ground squirrels proliferate in drier interior forests. The latter two look almost alike, but the stripes on the side of the chipmunk’s head distinguish them from each other. Expect to see the dark brown, cinnamon-bellied Douglas squirrel on both sides of the Cascades.