Eastern Milksnake
Lampropeltis triangulum • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: L. triangulum
Southeastern Canada through much of the Eastern United States. In Massachusetts, it is widespread across the mainland.
Look up Eastern Milksnake in the Snake Encyclopedia →Venomous Status
Non-venomous (Aglyphous - lacks specialized venom-injecting fangs)
Danger Level
Harmless. These snakes are non-venomous and generally secretive. While they may bite if handled aggressively, the bite is medically insignificant.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: L. triangulum
Conservation
IUCN Status: Least Concern. While common, they face threats from habitat fragmentation and being killed by humans who mistake them for venomous species.
Physical Description
Slender body with smooth, glossy scales. Grayish or tan ground color with rows of reddish-brown to brown blotches bordered in black. Often features a distinct 'Y' or 'V' shaped light mark on the back of the head/neck. Pupils are round.
Size & Dimensions
The specimen in the image appears to be an adult, approximately 24 to 36 inches long. Typical adults range from 24 to 36 inches (61-91 cm), with a maximum record of 52 inches.
Habitat
Found in various habitats including deciduous/coniferous forests, meadows, rocky hillsides, and suburban farmland. Often found under debris or in old stone walls.
Behavior & Temperament
Primarily nocturnal or crepuscular, though active during the day in spring/fall. Secretive and prone to hiding. When threatened, they may vibrate their tail in dry leaves to mimic a rattlesnake strike posture.
Diet & Feeding
Active foragers that use constriction. Primarily feed on small mammals (mice, voles) and other snakes. They will also take lizards and birds.
Reproduction
Oviparous (egg-laying). Females lay clutches of 6 to 24 eggs in mid-summer, usually in rotting logs, leaf litter, or compost piles. Hatchlings emerge in late summer.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
Commonly confused with the Northern Watersnake (Nerodia sipedon), which has keeled scales and a heavier body, and the venomous Timber Rattlesnake (Crotalus horridus), which has a rattle, heat-sensing pits, and cat-like pupils.
Conservation Status
IUCN Status: Least Concern. While common, they face threats from habitat fragmentation and being killed by humans who mistake them for venomous species.
Cultural Significance
Named 'milksnake' due to a folk myth that they would sneak into barns to 'milk' cows, though they are actually in barns to hunt the rodents attracted to grain.
Notable Features
Famous for their role as Batesian mimics, where their color pattern vaguely resembles venomous snakes to deter predators. They have highly glossy, smooth scales that make them feel like polished leather.
Notes
Massachusetts daytime