Eastern Milk Snake
Lampropeltis triangulum • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Eastern North America, ranging from southeastern Canada (Ontario and Quebec) through the Northeastern and Midwestern United States, extending south into states like Tennessee and North Carolina.
Look up Eastern Milk Snake in the Snake Encyclopedia →Venomous Status
Non-venomous (Aglyphous - lacks specialized fangs)
Danger Level
Harmless; they generally prefer to flee. If handled, they may bite as a defensive mechanism, but they are not a threat to human safety.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Lampropeltis, Species: Lampropeltis triangulum
Conservation
Least Concern (IUCN); however, they are often killed by humans who mistake them for venomous species or Copperheads.
Physical Description
Gray to tan ground color with large, reddish-brown or chocolate-colored dorsal blotches outlined in black. A distinctive 'Y' or 'V' shaped light-colored mark is typically present on the back of the head. Scales are smooth, and the pupil is round.
Size & Dimensions
The specimen in the image appears to be a juvenile or sub-adult, approximately 30-50 cm. Adults typically range from 60 to 90 cm (24-36 inches), with a maximum recorded length of about 132 cm.
Habitat
Generalist species found in forests, rocky hillsides, meadows, and agricultural land. They are often found near human structures like barns and woodpiles; elevation ranges from sea level to over 1,200 meters.
Behavior & Temperament
Primarily nocturnal or crepuscular, though active during the day in spring. They are secretive forager-hunters that spend much of their time under logs or rocks. When threatened, they may vibrate their tail in dry leaves to mimic a rattlesnake.
Diet & Feeding
Active foragers that use constriction. Diet consists of rodents, small birds, eggs, lizards, and other snakes (including venomous ones due to their partial immunity to certain venoms).
Reproduction
Oviparous (egg-laying). Females lay clutches of 2 to 17 eggs in early summer, typically in rotting logs or piles of organic matter. Hatchlings emerge 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 keeled scales, vertical pupils, heat pits, and hourglass markings rather than blotches. Also confused with the Corn Snake (Pantherophis guttatus), which has weakly keeled scales and different head patterns.
Conservation Status
Least Concern (IUCN); however, they are often killed by humans who mistake them for venomous species or Copperheads.
Cultural Significance
Named 'Milk Snake' due to an old folk myth that they could suck milk from cows' udders in barns, which is biologically impossible. They are ecologically beneficial as they control rodent populations.
Notable Features
Features smooth, glossy scales that give the snake a shiny appearance. They are known for their Batesian mimicry, where their appearance and tail-vibrating behavior imitate more dangerous venomous snakes to deter predators.