Species: Thamnophis sirtalis
Encyclopedia of Puget Sound
of Texas-Oklahoma), 7 scales on each upper lip, 1 preocular (scale in front of eye), 3 postoculars (scales behind eye), keeled scales on the back, and an undivided anal scale (covers vent). Adult total length is usually 16-26 inches (41-66 cm), with the maximum around 52 inches) (131 cm). Newborns are around 5-7 inches (12-23 cm) in total length (Conant and Collins 1991, Smith and Brodie 1982).
Classification
Reptilia
Squamata
Colubridae
Thamnophis
NatureServe
Classification
Ecology and Life History
of Texas-Oklahoma), 7 scales on each upper lip, 1 preocular (scale in front of eye), 3 postoculars (scales behind eye), keeled scales on the back, and an undivided anal scale (covers vent). Adult total length is usually 16-26 inches (41-66 cm), with the maximum around 52 inches) (131 cm). Newborns are around 5-7 inches (12-23 cm) in total length (Conant and Collins 1991, Smith and Brodie 1982).