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Montana Field Guide

Montana Field Guides

Rough-skinned Newt - Taricha granulosa

Non-native Species

Global Rank: G5
State Rank: SNA

Agency Status


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General Description
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Species Range
Population Establishment Uncertain

Western Hemisphere Range


Range Comments
Only documented with a specimen collected near Thompson Falls in Mineral County collected in June of 1950 and an unverified observation record from the same area in 1979 (Maxell et al. 2003).

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Most common in mesophytic forests of conifers or hardwoods, although they also occur in open valleys/farmland. In lakes, concentrate in warmer shallows early then move deeper as temperature increases. Concentrate at tangled vegetation, tree roots.

Food Habits
Percent by weight data from southern BC; amphipods, 35; terrestrial insects, 20; tricoptera larvae, 19; anuran larvae, 1. Varies with prey availability. Concentrated feeding when anurans hatch.

Move mostly during rainfall at temps above 5 C. Reached densities of 300/ha (up to 2700/ha near edges) in a southwestern BC lake.

Reproductive Characteristics
In southwestern BC eggs laid June to early July; metamorphose occurs in August, and they may overwinter at high elevations with metamorphosis then in June to July. Live 4 to 5 years mostly terrestrially before sexually mature.

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Citation for data on this website:
Rough-skinned Newt — Taricha granulosa.  Montana Field Guide.  .  Retrieved on , from