Southern Durango spotted garter snake

Southern Durango spotted garter snake

Kingdom
Phylum
Subphylum
Class
Order
Suborder
Family
Genus
SPECIES
Thamnophis nigronuchalis

The Southern Durango spotted garter snake (Thamnophis nigronuchalis ) is a species of snake of the family Colubridae. It is endemic to the state of Durango, Mexico.

Animal name origin

The specific name nigronuchalis references the Latin word nigro meaning black, and nuchal meaning of the nape, and is derived from the black neck patch characteristic of the species.

Appearance

This is a heavy-bodied, medium sized garter snake. It has an oval-shaped head with two supralabial scales, two preocular scales, and a distinct black blotch on the dorsal surface of its neck. It has 149-165 ventral and 63-70 caudal scales. Ventral scales are heavily pigmented, often forming an irregular black stripe. The dorsal pattern consists of rufous-colored spots outlined in black in 5-10 rows, with no dorsal or lateral stripes.

Distribution

Geography

Continents
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Biogeographical realms

This snake is endemic to Durango state in Mexico, where it is found in wet meadows and riparian areas at altitudes of 8500–9000 feet. It appears to be restricted to high elevation drainage basins of the Sierra Madre Occidental.

Diet and Nutrition

This species has been documented to eat earthworms and amphibians, including Rana pipiens and Hyla species.

References

1. Southern Durango spotted garter snake Wikipedia article - https://en.wikipedia.org/wiki/Southern_Durango_spotted_garter_snake
2. Southern Durango spotted garter snake on The IUCN Red List site - https://www.iucnredlist.org/species/63984/12726140

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