May 30, 1806, at Camp Chopunnish, Idaho County, Idaho.
Skin rough; varies greatly from green to light tan to black, often with dark spots. Black stripe through eye and usually a dark triangle between the eyes. Large toe pads. Male has gray throat. Length: 0.8-2 in (1.9-5.1 cm).
On the ground among shrubs and grass, close to water.
From southern British Columbia to Baja California east to Montana, Idaho, and Nevada. Also, Channel Islands off southern California.
When Hollywood moviemakers need an authentic outdoor nighttime sound, they often record the call of the Pacific tree frog.