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Crotaphytus collaris

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA REPTILIA SQUAMATA CROTAPHYTIDAE

Scientific Name: Crotaphytus collaris
Species Authority: (Say, 1823)
Common Name/s:
English Eastern Collared Lizard
Taxonomic Notes: This species formerly included several closely related Crotaphytus species that are now recognized as distinct species. A phylogenetic analysis by McGuire (1996) concluded that C. collaris is monotypic; none of the nominal subspecies represent independent lineages, with the exception of nebrius, which McGuire recognized as a distinct species (C. nebrius). See Montanucci (1983) for information on hybridization with C. bicinctores in Arizona.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor/s: Hammerson, G.A., Lavin, P., Vazquez Díaz, J., Quintero Díaz, G. & Gadsden, H.
Reviewer/s: Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification:
Crotaphytus collaris is assessed as Least Concern because this species is widely distributed and is represented by many stable populations. It faces no major threats at present.

Geographic Range [top]

Range Description: Range extends from southeastern Utah, southern Colorado, Kansas, and central and southern Missouri south through Arizona, New Mexico, western and central Texas, Oklahoma, and Arkansas to Sonora and north-central mainland Mexico (Zacatecas and San Luis Potosi) (McGuire 1996, Stebbins 2003). Records for Louisiana may not represent natural occurrences (Dundee and Rossman 1989, McGuire 1996).
Countries:
Native:
Mexico; United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: McGuire (1996) mapped hundreds of collection sites across the broad range in the United States and Mexico. The total adult population size is uncertain but clearly exceeds 100,000. The extent of occurrence, area of occupancy, and abundance all appear to be relatively stable.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: The habitat consists of rocky areas with sparse vegetation and encompasses open woodlands, bunchgrass areas, canyons, gullies, slopes, and mesa tops (Degenhardt et al. 1996, McGuire 1996, Bartlett and Bartlett 1999, Hammerson 1999, Stebbins 2003, Trauth et al. 2004). When inactive, these lizards hide under rocks or in crevices. Eggs are laid under large rocks or in burrows (Collins 1982).
Systems: Terrestrial

Threats [top]

Major Threat(s): No major threats have been identified.

Conservation Actions [top]

Conservation Actions: Many populations exist in protected areas. No direct conservation measures are needed for this species.
Citation: Hammerson, G.A., Lavin, P., Vazquez Díaz, J., Quintero Díaz, G. & Gadsden, H. 2007. Crotaphytus collaris. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 17 April 2014.
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