Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Ambystomatidae

Scientific Name: Ambystoma macrodactylum
Species Authority: (Baird, 1850)
Common Name(s):
English Long-toed Salamander
Ambystoma macrodactyla Baird, 1850
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: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Geoffrey Hammerson
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

Geographic Range [top]

Range Description: This species can be found in North America from southeastern Alaska southward to Tuolumne County, California, east to Rocky Mountains (east to east-central British Columbia, west-central Alberta, western Montana, and central Idaho). There are isolated populations in Santa Cruz and Monterey counties, California (Bury et al. 1980). It occurs from sea level to about 3,050m asl (Stebbins 1985).
Countries occurrence:
Canada; United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The total adult population size is unknown, but it surely exceeds 10,000.
Current Population Trend: Stable
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It is found in a wide variety of habitats, from semiarid sagebrush deserts to sub alpine meadows, including dry woodlands, humid forests, and rocky shores of mountain lakes. Adults are subterranean except during the breeding season. It breeds in temporary or permanent ponds or in quiet water at the edge of lakes and streams. During the breeding season adults may be found under logs, rocks, and other debris near water. Eggs are attached to vegetation or loose on bottom.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): In the Cascades of northern Washington, larval abundance was related to both lake productivity and the presence of introduced trouts (reduced larval abundance when trout present) (Tyler et al. 1998). In Montana, introduced trout populations clearly excluded salamanders from lakes (Funk and Dunlap 1999).

Conservation Actions [top]

Conservation Actions: Fisheries management could improve the status of salamander populations by not introducing fishes into salamander habitats where fishes are not native. Removal of non-native fishes from otherwise favourable salamander habitat is appropriate in many locations.

Citation: Geoffrey Hammerson. 2004. Ambystoma macrodactylum. The IUCN Red List of Threatened Species 2004: e.T59063A11864622. . Downloaded on 09 October 2015.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided