Eastern Milk Snake
Lampropeltis triangulum • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Common throughout the Eastern and Central United States and southeastern Canada, ranging from Maine and Ontario south to Alabama and North Carolina.
Look up Eastern Milk Snake in the Snake Encyclopedia →Venomous Status
Non-venomous (Aglyphous - lacking specialized venom-conducting fangs)
Danger Level
Harmless. Though they may strike or bite if handled roughly, the bite is small and clinically insignificant to humans.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Conservation
Least Concern (IUCN). Generally common, though vulnerable to habitat loss and persecution due to confusion with venomous species.
Physical Description
Slender body with smooth, glossy scales. Features a pattern of reddish-brown or chocolate-brown dorsal blotches outlined in black, set against a grey or tan background. A characteristic 'V' or 'Y' shaped light mark is often present on the back of the head/neck. Pupils are round.
Size & Dimensions
Typically 60-90 cm (24-36 inches) in length. Large specimens can reach up to 132 cm (52 inches). The specimen in the image appears to be a sub-adult or adult approximately 70-80 cm long.
Habitat
Generalist species found in fields, woodlands, rocky hillsides, and farm outskirts. Often found under debris, logs, or in barns (hence the name). Range from sea level to over 2,000 meters in elevation.
Behavior & Temperament
Primarily nocturnal and secretive, often spending days hiding under cover. They are generally docile but may vibrate their tails against dry leaves to mimic a rattlesnake when threatened and may musk if captured.
Diet & Feeding
Generalist carnivore. Uses constriction to kill prey. Feeds on small rodents, birds, eggs, lizards, and other snakes (including venomous species, as they have some immunity to local pit viper venom).
Reproduction
Oviparous (egg-laying). Females lay clutches of 2 to 17 eggs in early summer, often in rotting logs or leaf litter. Hatchlings emerge in late summer or early fall.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
Commonly confused with the venomous Copperhead (Agkistrodon contortrix), which has hourglass-shaped bands and vertical pupils, and the Corn Snake (Pantherophis guttatus), which has keeled scales and different head markings.
Conservation Status
Least Concern (IUCN). Generally common, though vulnerable to habitat loss and persecution due to confusion with venomous species.
Cultural Significance
Named 'Milk Snake' due to an old folktale claiming they would sneak into barns to suck milk from cows. Ecologically beneficial as a controller of rodent populations.
Notable Features
Famous for its vibrant 'Triangulum' pattern which varies significantly across its wider North American range, and its ability to eat other snakes (ophiophagy).