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Sistrurus miliarius

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA REPTILIA SQUAMATA VIPERIDAE

Scientific Name: Sistrurus miliarius
Species Authority: (Linnaeus, 1766)
Common Name(s):
English Pygmy Rattlesnake

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.
Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification:
Listed as Least Concern in view of its wide distribution, 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 is endemic to the United States. Its range extends from eastern North Carolina to the Florida Keys, west to Oklahoma and eastern Texas, and north to southern Missouri and southwestern Kentucky (Conant and Collins 1991, Palmer and Braswell 1995, Werler and Dixon 2000, Campbell and Lamar 2004, Trauth et al. 2004).
Countries:
Native:
United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is represented by a large number of occurences. On a range-wide scale, Campbell and Lamar (2004) mapped hundreds of collection sites. The adult population size is unknown but presumably exceeds 100,000. This snake is common to locally abundant in some areas of suitable habitat in the core of the range. Population trends are undocumented, but its extent of occurrence, area of occupancy, number of subpopulations, and population size are probably relatively stable or declining at a rate of less than 10% over 10 years or three generations.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Habitats include wet prairies, wet savannas and pastures, palmetto-pine flatwoods, swamps, hardwood-dominated floodplains, sandhills, mixed pine-hardwood forest, hilly second-growth forests, scrub pinewoods, borders of cypress ponds, vicinity of lakes and marshes, and along rice-field canals and roadside ditches, generally in moist or wet lowlands (Werler and Dixon 2000, Ernst and Ernst 2003). This snake is mainly terrestrial; it shelters under surface cover (logs, stumps, thickets, etc.) or in animal burrows. It swims well; rarely climbs into vegetation.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): No major threats are known. Locally, habitat loss and degradation probably have reduced or eliminated some populations. Between September 1997 and March 1998, a severe skin, eye, and mouth disease (fungal dermatitis and stomatitis) was observed in a subpopulation of subspecies barbouri at the Lake Woodruff National Wildlife Refuge in Volusia County, Florida (Cheatwood et al. 2003).

Conservation Actions [top]

Conservation Actions: Many occurrences are in protected areas.

Citation: Hammerson, G.A. 2007. Sistrurus miliarius. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 22 December 2014.
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