Ring-necked Snake
Diadophis punctatus • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Dipsadinae, Genus: Diadophis, Species: Diadophis punctatus
Widely distributed across much of North America, including most of the United States, southeastern Canada, and central Mexico.
Look up Ring-necked Snake in the Snake Encyclopedia →Venomous Status
Mildly venomous (Opisthoglyphous / Rear-fanged).
Danger Level
Harmless / Low Risk. They are non-aggressive, and their mouth is too small for their rear fangs to pose any threat to humans or pets.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Dipsadinae, Genus: Diadophis, Species: Diadophis punctatus
Conservation
IUCN Status: Least Concern. The species is widespread and abundant, though localized populations may face threats from habitat loss and pollution.
Physical Description
Small, slender snake with smooth scales. Coloration is typically bluish-gray to black on the dorsal side. A prominent yellowish-orange or cream-colored ring encircles the neck. The belly is usually bright yellow, orange, or red, often featuring small black spots.
Size & Dimensions
The specimen appears to be an adult, approximately 25-35 cm in length. Typical adult size ranges from 25 to 38 cm (10-15 inches), though some subspecies reach up to 80 cm.
Habitat
Found in a variety of habitats but prefers moist soil and cover. Typical habitats include deciduous forests, rocky hillsides, meadows, and backyard gardens. They are primarily fossorial or secretive, spending most time under leaf litter, logs, or rocks.
Behavior & Temperament
Secretive and nocturnal. When threatened, it may exhibit a unique defensive display by coiling its tail to reveal the bright warning colors of its underside (aposematism) and may release a foul-smelling musk.
Diet & Feeding
Feeds primarily on small salamanders, earthworms, slugs, and occasionally small frogs or other snakes. It uses a combination of constriction and mild venom to secure its prey.
Reproduction
Oviparous (egg-laying). Females lay clutches of 2 to 10 eggs in early summer, typically in communal nesting sites under rocks or logs. Young hatch in late summer or autumn.
Venom Profile
Possesses specialized spit glands (Duvernoy's glands) that produce a mild venom used to subdue small prey. Not medically significant to humans.
Look-alikes
Could be confused with the Red-bellied Snake (Storeria occipitomaculata), which has keeled scales and lacks a complete neck ring, or young Black Racers, which usually have a pattern of blotches.
Conservation Status
IUCN Status: Least Concern. The species is widespread and abundant, though localized populations may face threats from habitat loss and pollution.
Cultural Significance
Ecologically significant as a mid-level predator that controls populations of invertebrates and small amphibians. Frequently encountered by gardeners, where it acts as natural pest control.
Notable Features
Distinguished by its vibrant 'warning' belly colors and the namesake neck ring. It is one of the few North American snakes to display a complex tail-coiling defensive behavior.