GAP Analysis Predicted Distribution Map

Cascade Torrent Salamander (Rhyacotriton cascadae)

Species Code: RHCAS

Click to enlarge Range map

= Core Habitat
= Marginal Habitat

Metadata (Data about data or how the map was made)

Predicted Distribution
Amphibians do not migrate as some birds and mammals, so the colored areas depict the predicted range for the Cascade Torrent Salamander year-round. The habitats were identified using 1991 satellite imagery, other datasets and experts throughout the state, as part of the Washington Gap Analysis Project.

Click to enlarge distribution map

Other maps & Information:
  • NatureMapping observations
    throughout the year

Distribution and Habitat Requirements
Torrent salamanders are specialized to a life in cold water splash zones around streams, seepages or waterfalls. This salamander is found in the Cascade Mountains south of Mt. Rainier to the Columbia River. The range of the Cascade Torrent Salamander is separated from that of the Columbia Torrent Salamander by the alluvial bottom of the Cowlitz Riiver. This species is associated with small streams.

The Southwest Cascades ecoregion plus areas slightly into the Southeast Cascades were selected. The Western Hemlock zone was the core area. The Silver Fir, Mountain Hemlock and Interior Douglas-fir zones were marginal. Riparian areas (areas along rivers and streams) were good habitats. Closed-canopy hardwood, hardwood, hardwood/conifer and conifer forests were suitable if appropriate microhabitats existed. The Nisqually River was used as the northern Cascades boundary.

Translated from the Washington Gap Analysis Amphibians and Reptiles Volume by Karen Dvornich
Webpage designed by Dave Lester