Ring-necked Snake
Diadophis punctatus • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Dipsadinae, Genus: Diadophis, Species: punctatus
Widespread throughout much of North America, including southern Canada, almost the entire United States (excluding high mountains and dry deserts), and central Mexico.
Look up Ring-necked Snake in the Snake Encyclopedia →Venomous Status
Mildly venomous (opisthoglyphous/rear-fanged); lacks a delivery system dangerous to humans.
Danger Level
Harmless; they are very small, reluctant to bite, and their venom cannot significantly affect humans.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Dipsadinae, Genus: Diadophis, Species: punctatus
Conservation
Least Concern (IUCN). Generally abundant, though sensitive to habitat destruction and pesticide use due to their diet of invertebrates.
Physical Description
Slender body with smooth, dorsal scales. Coloration is typically bluish-gray, olive, or black with a distinct bright yellow, orange, or cream-colored ring around the neck. The belly is usually bright yellow or orange, often with black spots. The specimen in the image appears to be a deceased adult showing the characteristic dark dorsal color and slender build.
Size & Dimensions
Typical adult range is 25 to 38 cm (10-15 inches). Large specimens can reach 46 cm (18 inches). This specimen appears to be an average-sized adult.
Habitat
Highly adaptable but prefers moist soils and leaf litter. Found in hardwood forests, open woodlands, rocky hillsides, and damp meadows. Typically fossorial or secretive, hiding under rocks, logs, or debris.
Behavior & Temperament
Secretive and nocturnal. When threatened, they exhibit a unique defensive display called 'basal tail curling,' exposing the brightly colored underside to startle predators. They are exceptionally docile and rarely bite humans.
Diet & Feeding
Specialized hunters of small prey including earthworms, slugs, salamanders, and occasionally small lizards or other snakes. They use a combination of constriction and mild venomous saliva.
Reproduction
Oviparous (egg-laying). Females lay clutches of 3 to 10 eggs in early summer in shared nesting sites. Eggs hatch in late summer or autumn.
Venom Profile
Mildly neurotoxic saliva used to subdue small prey. Non-medically significant to humans.
Look-alikes
Often confused with the Dekay's Brownsnake (Storeria dekayi) or Red-bellied Snake (Storeria occipitomaculata), but can be distinguished by the smooth scales and the prominent, clear neck ring.
Conservation Status
Least Concern (IUCN). Generally abundant, though sensitive to habitat destruction and pesticide use due to their diet of invertebrates.
Cultural Significance
Valued by gardeners and farmers as a form of natural pest control due to their diet of slugs and insects. They are popular 'starter' snakes for budding herpetologists due to their gentle nature.
Notable Features
Features a bright 'warning' color on the belly (aposematism) used to deter predators, even though the snake is mostly harmless. Many subspecies exist with varying belly patterns and ring integrity.