Idaho Giant Salamander

Range

Northern Idaho and a small area in western Montana along border with Idaho.

Habitats

The only salamander that inhabits streams in Montana. Also prefers to stay in humid woodlands under bark, rocks, or logs close to streams or lakes. Has been known to adapt well to natural disturbances including landslides, increasing in population in water sources where landslide sediment had been deposited. Adults stay hidden under natural protection and are not commonly found in open spaces.

Identification

Dorsum is black or brown with bronze spotting. Body heavy overall with proportionally large head and powerful legs. Total length can be as small as 3.5 inches and as large as 8 inches. Males and females usually breed in water sources including lakes and streams. The female lays large, elongated eggs in water under rocks, logs, or in cracks in rocks. Clutches range from 135-200 in size. Females protect the eggs until they have hatched in the spring. Larvae exhibit small gills and a fin protruding from posterior legs.

Learn more with Schechter Natural History's Guide to Reptiles and Amphibians