April 24, 1806, on the north side of the Columbia River, above the mouth of the John Day River, Klickitat County, Washington.
Yellowish brown, with yellowish belly. Feet buff to light brown. Whitish spots between eyes. Buff or yellowish patches below ear to shoulders. Tail bushy. Length: 18.5–28 in (47–70 cm); tail: 5.1–8.6 in (13–22 cm). Weight: 5–10 lb (2.2–4.5 kg).
Rocky areas, talus slopes, valleys, and foothills to elevations of 11,000 ft (3,300 m).
British Columbia, southern Alberta, and Montana south through eastern California and east to Colorado and northern New Mexico. Western Idaho and eastern Washington and Oregon.
The yellow-bellied marmot feeds entirely on green vegetation of many kinds.
