Mexican Black-headed Snake

Tantilla atriceps

Venom Status:

Non Venomous

 

Characteristics:

A tiny (6-8”) secretive snake of the aridlands. This and the very similar Southwestern black-headed snake cannot be differentiated externally. Use range as an identifier. Ranges do not overlap. Black cap has an even to weakly convex posterior edge that terminates ½ to 3 scale rows posterior to parietal plates. Dorsum grayish brown to brown; belly orange, brightest posteriorly. May have a vague slightly darker vertebral stripe. Use range as an identifier. Oviparous. Scales smooth in 15 rows.

 

Unique Features:

Black cap has an even to weakly convex posterior edge that terminates ½ to 3 scale rows posterior to parietal plates.

 

Habitat and Diet:

Various sandy habitats such as grasslands, brushy desert, and open woodlands. A tiny (6-8”) secretive snake of the aridlands. This and the very similar Southwestern black-headed snake cannot be differentiated externally. Black cap has an even posterior edge. Dorsum grayish brown to brown; belly orange, brightest posteriorly. Use range as an identifier. Prey items include many species of suitably sized invertebrates, especially arthropods

 

Geographic Range:

TX,