Family: Ranidae, True Frogs view all from this family

Description 1 5/8-3" (3.9-7.5 cm). Gray to brown to olive, with light-colored band across top of head. Gray mottling may be present on back. Dorsolateral ridges indistinct. No dark mask. Eardrum granular. Lower abdomen and underside of legs yellow. Toes fully webbed. Male has swollen, darkened thumbs.

Voice Rasping, unmusical note given 4-5 times in rapid series; rarely heard.

Breeding March to May, when streams have slowed after winter runoff. Egg clusters are attached to downstream side of submerged rocks.

Habitat Aquatic. Prefers gravelly or sandy streams with sunny banks and open woodlands nearby. From sea level to about 6,000' (1,800 m).

Range From w. Oregon to s. California - Los Angeles County near coast and Kern County inland; absent from the central valley.

Discussion Primarily diurnal. When threatened, it dives quickly to the bottom and hides among the rocks.