Canis lupus is the largest canid, not only in Oregon, but in the rest of the world as well.
The wolf has relatively long legs, a narrow and deep chest, elbows that turn inward and foot pads that turn outward. These, combined with the digitigrade feet possessed by all canids, make the wolf highly adapted for running. The pelage of gray wolves is long over the body and tail, but relatively short on the legs and face. The predominant color is gray, but the legs, flanks, and venter sometimes are yellowish or light brownish. These colors are overlain by long, black guard hairs on the dorsum, tail, and mane; some individuals are essentially entirely black. Occasionally, but more commonly in higher latitudes, all-white individuals occur.
Wolves commonly function in packs consisting of two to nine individuals; packs basically are family units. Pack cohesion is based on ties developed during courtship of adults and those developed during early life of the young. Wolves may be active at any time, but tend to be more active at night. They travel extensively. Howling, distinctive among individuals, is used to assemble the pack and to advertise the territory.