NPSpecies

Although few records exist (Darwin Plateau area, Grapevine Mountains, Surprise Canyon), probably at least locally common to abundant, but likely patchily distributed. One found in 2002 (reptile surveys, NPS I&M program) at Darwin Falls.

Park Species Detail: Turner and Wauer (1963) and Banta (1962) still refer to this species as T. utahensis (Utah black-headed snake)., Park Species Data Source: Checklist of the amphibians and reptiles of Death Valley National Monument. April 1961.; Turner and Wauer (1963); Banta (1962); 2002 reptile inventory (I&M program); Persons & Nowak 2006 (654476): Title from DVD: FinalReport_DEVA_AmphibRept_May2006.doc. Local List Details: Crother, B. I. (ed.). 2008. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, pp. 1–84. SSAR Herpetological Circular 37. Online at http://www.ssarherps.org/pages/comm_names/Index.php (last accessed December 10, 2013). Exploitation Concern Details: Not likely to be collected for the pet trade.