Western Chorus Frog

The western chorus frog is characterized by a white or cream colored stripe along the upper lip, bordered by a dark brown stripe running through the eye from the nostril to the groin. There are usually 3 dark stripes running down the back, although these may be broken into rows of spots in some specimens. Background color ranges from brown to gray or olive. The underside is white or cream colored, possibly with dark spots on the chin and throat (Conant and Collins, 1991). Males have a yellow colored vocal sac that appears as a dark, loose flap of skin when not calling. The skin of the western chorus frog is typically moist and bumpy, and the toes end in slightly expanded toepads. Adult length is typically 1.9 to 3.9 cm (.75" to 1.5"), with males usually smaller than females. P. triseriata tadpoles have gray or brown bodies round in shape. Their tail fins are clear, often with dark flecks. The intestinal coil can be seen through the bronze belly skin. Maximum length before metamorphosis is about 3cm (1.2 inches).