About Tantilla wilcoxi Stejneger, 1902
Tantilla wilcoxi, formally named Tantilla wilcoxi Stejneger, 1902, can reach a total length of 14 inches (36 centimeters) when including its tail. The dorsal side of its head is black, and this black marking is followed by a broad white nuchal collar that covers the posterior tips of the parietal scales. The main body of this species is brown. Its smooth dorsal scales are arranged in 15 rows, and its anal plate is divided. In the United States, Tantilla wilcoxi occurs in southeastern Arizona and southwestern New Mexico. In Mexico, it can be found in southeastern Aguascalientes, Chihuahua, Coahuila, central Durango, Jalisco, Nuevo León, northeastern Sinaloa, Sonora, Tamaulipas, and Zacatecas. Its preferred natural habitats are forest, shrubland, and desert, and it lives at altitudes ranging from 914 to 2,438 meters (3,000 to 8,000 feet). Tantilla wilcoxi is oviparous, meaning it reproduces by laying eggs.
