Glossy Snake (Arizona elegans ). Nocturnal; usually occurs in sandy areas.
Western Shovel-nosed Snake (Chionactis occipitalis ). Nocturnal; most common among sand dunes.
Night Snake (Hypsiglena torquata ). Nocturnal; usually occurs on rocky slopes and in canyons.
Common Kingsnake (Lampropeltis getula ). Nocturnal during summer, diurnal during spring and fall; occurs in all habitats but rare in sand dunes.
Coachwhip (Masticophis flagellum ). Diurnal; lives in all habitats but less common in rocky areas.
Gopher Snake (Pituophis catenifer ). Both nocturnal and diurnal; occurs in all habitats.
Long-nosed Snake (Rhinocheilus lecontei ). Nocturnal; most common in sandy areas.
Western Patch-nosed Snake (Salvadora hexalepis ). Diurnal; most common in sandy areas.
Ground Snake (Sonora semiannulata ). Nocturnal; active in the early evening; prefers rocky areas.
Southwestern Black-headed Snake (Tantilla hobartsmithi ). Nocturnal; occurs in rocky areas.
Western Blind Snake (Leptotyphlops humilis ). Nocturnal; occurs in washes of rocky areas; can be common in areas with permanent surface water.
Sidewinder (Crotalus cerastes ). Usually nocturnal; occurs in all habitats but most common in sandy areas.
Speckled Rattlesnake (Crotalus mitchellii ). Both nocturnal and diurnal; most common in rocky areas.