Pacific Treefrog: Hyla regilla

Common name: Pacific Treefrog
Scientific name: (Hyla regilla)
Classification name: Treefrog

Description: The Pacific Treefrog has rough skin of various colours and patterns. It is distinguished from other treefrogs by a dark brown or black line across the face that runs horizontally through each eye. It has large toe pads which help it climb and often has a dark triangle between the eyes. Adults may reach 5 cm.

Call: The call is a repeated series of two short high pitched notes. The first note is shorter, higher and raspier than the second so that the call sounds syncopated.

Confusing Species: The Spotted Frogs may be confused with Red-legged Frogs which differ in having incomplete webbing on the toes and not having upturned eyes. Red-legged Frogs do not have mottling on the throat and are always yellow beneath with red wash on the underside of the legs and the belly. Leopard Frogs have much more distinct dark spots with light rings around them. The other true frogs found within its range do not have spots.

Distributions: The Oregon Spotted Frog is restricted to extreme southwestern British Columbia, adjacent areas of Washington and parts of Oregon and northern California.

Habitat: Spotted Frogs are found in permanent water in alpine and subalpine areas with mixed coniferous or subalpine forests.

Reproduction: Breeding occurs early in spring and egg masses are laid communally with each consisting of 700-1500 eggs. They hatch in about four days. Larvae may transform by the end of summer or overwinter as tadpoles and transform the following year. They may take up to six years to reach maturity.

Natural History: Spotted Frogs are primarily aquatic and when frightened will swim to the bottom and remain still. Differences in natural history between the two species have not been explored.

Conservation Concerns: The Oregon Spotted Frog is very rare in British Columbia. The original known population appears to be extirpated but a new population was recently discovered.