Eastern Hognose Snake
Heterodon platirhinos • Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: Heterodon platirhinos
Found across eastern North America, from southern Ontario and New Hampshire, south to Florida, and west to Texas and Kansas.
Look up Eastern Hognose Snake in the Snake Encyclopedia →Venomous Status
Rear-fanged (opisthoglyphous); possesses mild venom specialized for prey but not considered dangerous to humans.
Danger Level
Harmless; they are famously reluctant to bite humans, typically opting for elaborate defensive displays rather than physical strikes.
Family
Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: Heterodon platirhinos
Conservation
IUCN Red List: Least Concern. However, they face threats from habitat loss and being frequently killed by people who mistake them for venomous vipers.
Physical Description
Stocky body with a highly characteristic upturned (snub) snout used for digging. Coloration is highly variable; this specimen shows a patterned phase with dark brown or black blotches on a lighter tan/grey background. Head is broad with a distinct dark band behind the eye.
Size & Dimensions
This specimen appears to be an adult, approximately 60-70 cm long. Typical adult range is 50-85 cm, with a maximum record of about 115 cm.
Habitat
Prefers areas with sandy soil for burrowing, including open woodlands, forest edges, grasslands, and coastal scrub. Found from sea level up to approximately 750 meters.
Behavior & Temperament
Famous for dramatic defensive displays including flattening the neck (cobra-like), loud hissing, and eventually 'playing dead' (thanatosis) by flipping onto its back with its tongue out.
Diet & Feeding
Specliazed toad-eater (bufophagous). They use their upturned snouts to dig for toads and enlarged rear teeth to puncture inflated toads so they can be swallowed.
Reproduction
Oviparous (egg-laying). Females lay clutches of 8-40 eggs in early summer, which hatch in late summer or early autumn.
Venom Profile
Mildly venomous; contains specialized secretions that assist in neutralizing toads. It is not life-threatening to humans and usually only causes mild swelling or itching in rare cases of a prolonged 'reflex' bite.
Look-alikes
Often confused with Copperheads (Agkistrodon contortrix) or Dusky Pygmy Rattlesnakes (Sistrurus miliarius) due to their blotched patterns and ability to flatten their heads. Distinguished by the upturned nose and round pupils.
Conservation Status
IUCN Red List: Least Concern. However, they face threats from habitat loss and being frequently killed by people who mistake them for venomous vipers.
Cultural Significance
Commonly known by nicknames like 'puff adder' or 'hissing sand snake.' They play a vital role in ecosystems by controlling toad and frog populations.
Notable Features
Macro-specialization for eating toxic toads, including enlarged adrenal glands to handle toad toxins and the most convincing 'death-feigning' behavior in the snake world.