Northern Water Snake
Nerodia sipedon

Family Colubridae Description: Adults 30" to 53" in length. Color gray, brown, or tan, with darker bands on anterior end of body, changing to dark angular blotches posteriorly. Underside yellowish or gray, with with grey, yellowish, or reddish markings. Moderately heavy body, with keeled scales. Divided anal plate. Elevation Range: Below 5500' in eastern Colorado. Subspecies in Colorado: Nerodia sipedon sipedon Listed as Natrix sipedon in older publications.		Photo by L. Livo and S. Wilcox, from Hammerson, 1986. Used with permission.
County Ref. County Ref. County Ref. County Ref. Adams  *  Dolores   La Plata   Pitkin   Alamosa   Douglas  *  Lake   Prowers H Arapahoe HMS11 Eagle   Larimer H Pueblo  *  Archuleta   El Paso  *  Las Animas  *  Rio Blanco   Baca  *  Elbert  *  Lincoln  *  Rio Grande   Bent H Fremont  *  Logan RLh5 Routt   Boulder H Garfield   Mesa   Saguache   Chaffee   Gilpin   Mineral   San Juan   Cheyenne  *  Grand   Moffat   San Miguel   Clear Creek   Gunnison   Montezuma   Sedgwick  *  Conejos   Hinsdale   Montrose   Summit   Costilla   Huerfano  *  Morgan H Teller   Crowley  *  Jackson   Otero H Washington  *  Custer  *  Jefferson  *  Ouray   Weld H Delta   Kiowa  *  Park   Yuma H Denver H Kit Carson  *  Phillips  *