Taricha rivularis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Taricha rivularis
Species Authority: (Twitty, 1935)
Common Name(s):
English Redbelly Newt

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2014
Date Assessed: 2014-02-25
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Luedtke, J.
Contributor(s): Hammerson, G.A.
Facilitator/Compiler(s): Garcia Moreno, J.
Listed as Least Concern since, although its extent of occurrence (EOO) is less than 20,000 km2, it occurs in an area of extensive, suitable habitat which appears not to be under significant threat, and it has a presumed large population.
2004 Least Concern

Geographic Range [top]

Range Description: This species can be found from the Coast from Honeydew, Humboldt County, south to the Russian River area, Sonoma County, California, United States (Stebbins 1985).
United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is common in many streams (Petranka 1998) and its population seems stable. Total adult population size is unknown but surely exceeds 100,000; Twitty (1966) marked 20,000+ in one study area.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: It can be found in mountain streams and rivers in coastal woodlands and redwood forest. When inactive, occurs under rocks, logs, other forest debris, and in rodent burrows and subterranean crevices. Usually breeds in flowing water. Lays eggs on undersides or rocks in foothill/mountain streams. Amplexus between March and late April.
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade: No records of this species being utilized.

Threats [top]

Major Threat(s): None known. Local populations might be impacted by deforestation, but it is not significantly threatened.

Conservation Actions [top]

Conservation Actions: None needed. It occurs in a number of protected areas, but it would be beneficial to promote research on its natural history, population status, and the monitoring of its populations.

Citation: IUCN SSC Amphibian Specialist Group 2014. Taricha rivularis. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 31 August 2015.
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