- Adults 12" to 20" in length. Color gray, yellowish, or beige, with dorsal row of dark brown spots. Row of smaller spots on sides; usually a large brown blotch on each side of neck. Moderately slender body; scales smooth. Pupils vertical in bright light. Divided anal plate. Enlarged, ungroved teeth at rear of jaw; saliva toxic to lizards.
- Elevation Range:
- Below 6000' in southeastern Colorado; to 7900' in southwestern Colorado.
- Subspecies in Colorado:
- Hypsiglena torquata loreala in western Colorado;
Hypsiglena torquata janii in southeastern Colorado.
Photo from Hammerson, 1986.
Used with permission.