There are usually dark, squarish, blotches on the sides and back that are lighter toward the tail and darker near the head. Both of Wisconsin's venomous snakes belong to the "pit" viper family. FL Pine snake Pituophis melanoleucus mugitus [next last first previous August 3, 2013 Drexel Program Works To Save The New Jersey Northern Pine snake by editor Susan Bowen... Leucistic black Pine snake , swallowing Description: Pine snake s are large, fairly heavy-bodied snake s … Pinesnake, Common pine snake, Black and white snake, Bullsnake, Chicken snake, North American pine snake, Pilot snake, White gopher snake: Description: Size: 48-100 in (120-250 cm) in length. They are extremely valuable to the agricultural community by keeping grain eating mammals in check. According to the Wisconsin Department of Natural Resources, This is called a "pit" and is found on venomous snakes. Wisconsin Department of Natural Resources | 101 S. Webster Street . Pine snake may refer to: Pituophis melanoleucus, a nonvenomous colubrid found in North America; Lampropeltis g. getula, a.k.a. The "pit" helps them sense heat to locate prey. Those initial numbers may be deceiving. The twenty two Wisconsin snakes slither along the ground, climb trees and swim in the water. The ground color of pine snakes may be white, yellow, or light gray. Snakes of Wisconsin Snakes play very important roles in many natural communities as predator and prey. PO Box 7921 | Madison, Wisconsin 53707-7921 Call 1-888-936-7463 (TTY Access via relay - 711) from 7 a.m. - 10 p.m. Sexual Dimorphism: None. All but two species of venomous snakes, Eastern Massasauga (Sistrurus catenatus) and Timber Rattlesnake belong to the Colubrid family of typical snakes. snake is one of only five Wisconsin snakes to have unkeeled scales. The belly is white with dark spots on the sides. Distribution & Subspecies Recent studies suggest that snakes are also valuable in reducing disease threats posed by high rodent populations. No matter the adult color, the young are olive-green upon hatching. The bright emerald green color of this snake makes it easy to identify, although buff-colored individuals may be found in northern and central Wisconsin. Venomous Wisconsin snakes: elliptical pupil, like a cat's eye a rattle on the tail; a triangular or arrow-shaped wide head; small depression in their snout, half way between the eye and nostril. Weight: 4-8 lb (1.8-3.6 kg) Color: A light background color blotched with brown, black, or brownish-red. Description: Pine snakes are large, fairly heavy-bodied snakes that average 48-66 inches (122-168 cm).