Thamnophis scaliger

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	REPTILIA	SQUAMATA	NATRICIDAE

Scientific Name:	Thamnophis scaliger
Species Authority:	(Jan, 1863)

Assessment Information [top]

Red List Category & Criteria:	Vulnerable B1ab(iii) ver 3.1
Year Published:	2007
Date Assessed:	2007-03-01
Assessor(s):	Canseco-Márquez, L., Mendoza-Quijano, F. & Gustavo Quintero Díaz
Reviewer(s):	Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification: Listed as Vulnerable because its extent of occurrence is less than 20,000 km², it is known from fewer than ten locations, it is severely fragmented in parts of its range, and there is continuing decline in the extent and quality of its habitat.

Geographic Range [top]

Range Description:	This species is endemic to central Mexico. It is present as isolated highland populations in the Central Plateau and the volcanic belt. It has been recorded from Michoacan, Aguascalientes, State of Mexico and the Distrito Federal. It has an elevational range of 2,230 to 3,000 m asl.
Countries:	Native: Mexico
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	It is an uncommon species.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	The species is associated with streams and small canyons in semi-arid dry grasslands, shrubland and oak forest. It can be found in secondary habitats including agricultural areas, such as cattle pasture. It is a viviparous species.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	It is threatened by extensive habitat conversion to agricultural use. Populations can remain in areas with some limited habitat conversion.

Major Threat(s):

It is threatened by extensive habitat conversion to agricultural use. Populations can remain in areas with some limited habitat conversion.

Conservation Actions [top]

Conservation Actions:	It is not known to occur in any protected areas. There is a need to establish protected areas for this species. Further research is needed into the ecology, natural history and population of this species.

Conservation Actions:

It is not known to occur in any protected areas. There is a need to establish protected areas for this species. Further research is needed into the ecology, natural history and population of this species.

Citation:	Canseco-Márquez, L., Mendoza-Quijano, F. & Gustavo Quintero Díaz 2007. Thamnophis scaliger. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 24 July 2014.
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