Taricha granulosa 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Salamandridae

Scientific Name: Taricha granulosa
Species Authority: (Skilton, 1849)
Common Name(s):
English Roughskin Newt
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6 (27 January 2014). New York, USA. Available at: (Accessed: 27 January 2014).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2015
Date Assessed: 2015-08-25
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Hammerson, G.A.
Facilitator/Compiler(s): Garcia Moreno, J. & Hobin, L.
Listed as Least Concern in view of the large extent of occurrence, large number of sub-populations and localities, large population size, and use of a wide range of habitats.
Previously published Red List assessments:
2014 Least Concern (LC)
2004 Least Concern (LC)

Geographic Range [top]

Range Description: This species occurs on the Pacific coast of North America from southeastern Alaska to Santa Cruz County, California (Petranka 1998, Stebbins 2003). Records from the Rocky Mountains, including populations in Latah County, Idaho, and Sanders, Montana, could represent introductions, though Monello and Wright (1997) recorded three small populations in Latah County in 1997. Elevational range extends from sea level to about 2,800 m asl (Stebbins 2003).
Countries occurrence:
Canada (British Columbia); United States (Alaska, California, Oregon, Washington)
Upper elevation limit (metres): 2800
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is widespread and common, and its population is mostly stable. Total adult population size is unknown but surely exceeds 100,000.
Current Population Trend: Stable
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: Habitats include forests, woodlands, grasslands, open valleys, and ranch land. It can be found on land (in open or under rocks, logs, etc.) or in ponds, lakes, reservoirs, and slow-moving streams. It breeds in ponds, lakes, reservoirs, and slow-moving streams. Females deposit eggs singly on aquatic plants or submerged twigs (Behler and King 1979).
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade: There are no records of this species being utilized.

Threats [top]

Major Threat(s): No major threats are known. Road mortality is a localized threat throughout the range but does not represent a major threat.

Conservation Actions [top]

Conservation Actions: Conservation Actions
It occurs in many protected areas.

Conservation Needed
Undeveloped buffers should be maintained around breeding sites.

Classifications [top]

1. Forest -> 1.1. Forest - Boreal
suitability: Suitable season: resident major importance:Yes
1. Forest -> 1.4. Forest - Temperate
suitability: Suitable season: resident major importance:Yes
4. Grassland -> 4.4. Grassland - Temperate
suitability: Suitable season: resident major importance:Yes
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable season: resident major importance:Yes
5. Wetlands (inland) -> 5.2. Wetlands (inland) - Seasonal/Intermittent/Irregular Rivers/Streams/Creeks
suitability: Marginal season: resident 
5. Wetlands (inland) -> 5.5. Wetlands (inland) - Permanent Freshwater Lakes (over 8ha)
suitability: Suitable season: resident major importance:Yes
5. Wetlands (inland) -> 5.6. Wetlands (inland) - Seasonal/Intermittent Freshwater Lakes (over 8ha)
suitability: Marginal season: resident 
5. Wetlands (inland) -> 5.7. Wetlands (inland) - Permanent Freshwater Marshes/Pools (under 8ha)
suitability: Suitable season: resident major importance:Yes
5. Wetlands (inland) -> 5.8. Wetlands (inland) - Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha)
suitability: Marginal season: resident 
14. Artificial/Terrestrial -> 14.2. Artificial/Terrestrial - Pastureland
suitability: Suitable season: resident 
15. Artificial/Aquatic & Marine -> 15.2. Artificial/Aquatic - Ponds (below 8ha)
suitability: Suitable season: resident 
1. Land/water protection -> 1.2. Resource & habitat protection

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education

Bibliography [top]

Behler, J.L. and King, F.W. 1979. The Audubon Society Field Guide to North American Reptiles and Amphibians. New York.

Blackburn, L., Nanjappa, P. and Lannoo, M.J. 2001. An Atlas of the Distribution of U.S. Amphibians. Ball State University, Muncie, IN, USA.

Frost, D.R. 1985. Amphibian Species of the World: A Taxonomic and Geographic Reference. Allen Press and the Association of Systematic Collections, Lawrence, Kansas.

Gall, B. G., Stokes, A., N., French, S. S., Schlepphorst, E., A, Brodie III, E. D., Brodie Jr., E. D. 2011. Tetrodotoxin levels in larval and metamorphosed newts (Taricha granulosa) and palatability to predatory dagonflies. Toxicon 57: 978-983.

Hopkins, G. R., French, S. S., Brodie Jr., E. D. 2013. Increased frequency and severity of developmental deformities in rough-skinned newt (Taricha granulosa) embryos exposed to road deicing salts (NaCL & MgCl2). Environmental Pollution 173: 264-269.

Hopkins, G. R., Gall, B. G., French, S. S., Brodie Jr., E. D. 2012. Interfamily variation in amphibian early life-history traits: raw material for natural selection? Ecology and Evolution 2(7): 1637-1643.

IUCN. 2015. The IUCN Red List of Threatened Species. Version 2015-4. Available at: (Accessed: 19 November 2015).

Monello, R.J. and Wright, R.G. 1997. Geographic distribution: Taricha granulosa. Herpetological Review: 155.

Nussbaum, R.A. and Brodie, E.D. Jr. 1981. Taricha granulosa. Catalogue of American Amphibians and Reptiles: 1-4.

Nussbaum, R.A., Brodie, Jr., E.D. and Storm, R.M. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho, Moscow, ID, USA.

Petranka, J.W. 1998. Salamanders of the United States and Canada. Smithsonian Institution Press, Washington, D.C.

Stebbins, R.C. 1954. Amphibians and Reptiles of Western North America. McGraw-Hill Book Company, New York.

Stebbins, R.C. 1985. A Field Guide to Western Reptiles and Amphibians. Second Edition. Houghton Mifflin Company, Boston, Massachusetts.

Stebbins, R.C. 2003. A Field Guide to Western Reptiles and Amphibians. Third Edition. Houghton Mifflin Company, Boston, Massachusetts.

Welsh, H.H., Jr., Hodgson, G.R. and Lind, A.J. 2005. Ecogeography of the herpetofauna of a northern Californian watershed: linking species patterns to landscape processes. Ecography: 521-536.

Citation: IUCN SSC Amphibian Specialist Group. 2015. Taricha granulosa. The IUCN Red List of Threatened Species 2015: e.T59469A78909317. . Downloaded on 27 November 2015.
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