Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Squamata Viperidae

Scientific Name: Crotalus caliginis
Species Authority: Klauber, 1949
Crotalus oreganus subspecies caliginis Klauber, 1949

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Hollingsworth, B.
Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Listed as Least Concern because, although its extent of occurrence is much less than 5,000 km², it is common and occurs in a habitat that is not under significant threat.

Geographic Range [top]

Range Description: This species is known only from the Pacific island of Isla Coronado Sur, off the coast of northern Baja California, Mexico (Grismer 2002). It is ubiquitous on the island.
Countries occurrence:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is abundant within its small range.
Current Population Trend: Stable
Additional data:

Habitat and Ecology [top]

Habitat and Ecology: It lives in low-growing brush and cactus that are generally wind-blown and stunted (Grismer 2002). It is most commonly found under the leaves of the ice plant (Mesembryanthemum crystallinum) that covers the island (Oberbauer 1992).
Systems: Terrestrial

Threats [top]

Major Threat(s): There are no known threats within its small range.

Conservation Actions [top]

Conservation Actions: Its range is within the Islas del Golfo de California Fauna and Flora Protection Area. No direct conservation measures are currently needed for this species.

Citation: Hollingsworth, B. 2007. Crotalus caliginis. The IUCN Red List of Threatened Species 2007: e.T64313A12764254. . Downloaded on 09 October 2015.
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