Eastern Milksnake
Lampropeltis triangulum • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Southeastern Canada through the Northeastern and Midwestern United States, extending south toward the Appalachian Mountains.
Look up Eastern Milksnake in the Snake Encyclopedia →Venomous Status
Non-venomous; lacks fangs or venom delivery apparatus.
Danger Level
Harmless; they pose no threat to humans or pets, although they may strike defensively if handled roughly.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Conservation
Least Concern (IUCN). Generally stable, though threatened by habitat loss and persecution due to confusion with venomous species.
Physical Description
Gray to tan ground color with large, reddish-brown or chocolate-colored blotches bordered in black. Often features a distinctive 'Y' or 'V' shaped light mark on the back of the head. Scales are smooth; pupils are round.
Size & Dimensions
The specimen appears to be an adult roughly 24-30 inches long. Typical adult range is 24 to 36 inches (61–90 cm), with a maximum record near 52 inches.
Habitat
Generalist species found in forests, rocky hillsides, meadows, and agricultural areas. Often found under cover objects like logs, rocks, or debris.
Behavior & Temperament
Secretive, nocturnal or crepuscular, and generally shy. When threatened, they may vibrate their tail in dry leaves to mimic a rattlesnake and strike with a closed or open mouth; however, they are generally docile.
Diet & Feeding
Active foragers that use constriction. Primarily eat rodents, but also consume lizards, birds, and other snakes (including venomous ones).
Reproduction
Oviparous (egg-laying). Females lay clutches of 2 to 17 eggs in early summer, which hatch in late summer or early fall.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
Commonly confused with the Eastern Copperhead (Agkistrodon contortrix), which has hourglass-shaped bands, vertical pupils, and heat pits. Also confused with the Corn Snake (Pantherophis guttatus) which has keeled scales.
Conservation Status
Least Concern (IUCN). Generally stable, though threatened by habitat loss and persecution due to confusion with venomous species.
Cultural Significance
Named after the myth that they suck milk from cows' udders; in reality, they frequent barns only to hunt the rodents that live there. They are beneficial for pest control.
Notable Features
Highly variable in color across its range. Members of the genus Lampropeltis (kingsnakes/milksnakes) are immune to the venom of many local pit vipers, allowing them to prey on venomous snakes.