May 30, 1806, at Camp Chopunnish, Idaho County, Idaho.
Large; lacks cranial crests but has oval parotoid glands. Gray to green, with light-colored stripe down middle of back. Dark blotches on belly. Male has pale throat. Length: 2.5-5 in (6.4-12.8 cm).
Near springs, streams, meadows, woodlands.
Southeastern Alaska south through the Rocky Mountains to central Colorado, and south into northern California in the West.
Active at twilight. At higher elevations, where nighttime temperatures are low, it is often active during the day. It lives in burrows of its own construction or those of small rodents.
