Eastern Hog-nosed Snake
Heterodon platirhinos • Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: H. platirhinos
Eastern half of the United States, from southern Ontario, Canada, through the Great Lakes region and New England, south to Florida and west to Texas and Kansas.
Look up Eastern Hog-nosed Snake in the Snake Encyclopedia →Venomous Status
Mildly venomous (Rear-fanged/Opisthoglyphous); though not considered dangerous to humans.
Danger Level
Harmless; they are famously reluctant to bite and prefer elaborate bluffing displays over physical aggression.
Family
Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: H. platirhinos
Conservation
IUCN Red List: Least Concern. Locally threatened in some northern portions of their range due to habitat loss and decline in toad populations.
Physical Description
Highly variable in color (yellow, gray, brown, or melanistic black) with dark blotches. Distinguished by a stout body, keeled scales, and most notably an upturned (hooked) rostral scale on the snout for digging.
Size & Dimensions
The specimen pictured appears to be an adult of approximately 60-80 cm. Typical range is 50-85 cm (20-33 inches), with a maximum record of about 115 cm.
Habitat
Prefers areas with sandy soil or loose substrate for burrowing, including open woodlands, forest edges, fields, and coastal areas. Found from sea level to approximately 750 meters.
Behavior & Temperament
Defensive bluffers. When threatened, they flatten their necks (hooding like a cobra) and hiss loudly. If further harassed, they will 'play dead' (thanatosis) by flipping on their backs and lolling their tongues out.
Diet & Feeding
Specialized carnivore; primarily eats amphibians, particularly toads. They possess enlarged rear teeth to 'pop' inflated toads and have specialized adrenal glands to handle toad poisons.
Reproduction
Oviparous (egg-laying). Females lay clutches of 8 to 40 eggs in early summer, which hatch in late summer or autumn. No parental care is provided.
Venom Profile
Mildly toxic saliva specifically adapted for neutralizing toad toxins; creates localized swelling or itching but has no medically significant systemic effect on healthy humans.
Look-alikes
Commonly confused with venomous Pigmy Rattlesnakes (Sistrurus miliarius) or Copperheads (Agkistrodon contortrix) due to body shape; distinguished by the unique upturned snout and lack of heat pits.
Conservation Status
IUCN Red List: Least Concern. Locally threatened in some northern portions of their range due to habitat loss and decline in toad populations.
Cultural Significance
Often called 'Puff Adders' or 'Spread-heads' in rural folklore. They are highly valued by herpetologists and ecologists for their unique theatrical defensive behaviors.
Notable Features
Famous for thanatosis (death-feigning); if a 'dead' hog-nose is flipped back onto its belly, it will immediately flip back onto its back, 'insisting' that it is dead.