Eastern Hognose Snake
Heterodon platirhinos • Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: Heterodon platirhinos
Eastern half of the United States, from southern Ontario and New Hampshire to Florida and west to Texas and Minnesota.
Look up Eastern Hognose Snake in the Snake Encyclopedia →Venomous Status
Mildly venomous; opisthoglyphous (rear-fanged). High specialized for subduing amphibians.
Danger Level
Harmless to Low Risk. Extremely reluctant to bite humans; defensive displays are dramatic but intended to deter predators without physical contact.
Family
Order: Squamata; Suborder: Serpentes; Family: Colubridae; Subfamily: Dipsadinae; Genus: Heterodon; Species: Heterodon platirhinos
Conservation
IUCN Status: Least Concern. However, they are sensitive to habitat loss and decline in amphibian populations. Locally protected in some areas.
Physical Description
Characterized by an upturned (hog-like) snout. Coloration varies widely (melanistic, yellow, orange, or grey). This specimen shows a blotched pattern with a distinctively flattened neck. Scales are heavily keeled.
Size & Dimensions
Typically 50–85 cm (20–33 inches). Maximum recorded is approximately 115 cm. This specimen appears to be a large adult.
Habitat
Prefers sandy soils, open woodlands, fields, and coastal areas. Commonly found in areas with loose earth for burrowing and high concentrations of toads.
Behavior & Temperament
Famous for dramatic defensive displays including flattening the neck (cobralike appearance), loud hissing, and if further harassed, feigning death (thanatosis) by flipping onto its back with its mouth open.
Diet & Feeding
Specialist predator of toads (Bufo/Anaxyrus species). Uses its upturned snout to dig for prey and its rear fangs to 'pop' inflated toads and deliver specialized saliva.
Reproduction
Oviparous (egg-laying). Females lay clutches of 8–40 eggs in sandy soil during early summer; neonates hatch in late summer or autumn.
Venom Profile
Mildly toxic saliva specifically effective against toads (neutralizes bufotoxins). Not considered medically significant to healthy humans but can cause localized swelling or itching.
Look-alikes
Often confused with Rattlesnakes (Crotalus) or Cottonmouths (Agkistrodon piscivorus) due to its thick body and defensive neck-flattening, or Cobras (Naja) by the uninformed. Distinguished by the upturned hog-nose.
Conservation Status
IUCN Status: Least Concern. However, they are sensitive to habitat loss and decline in amphibian populations. Locally protected in some areas.
Cultural Significance
Known colloquially as the 'Puff Adder' or 'Spread-head' in folklore. Valued by gardeners and farmers for biological control of toad populations.
Notable Features
The most notable feature is its complex defense mechanism: flattening its neck like a cobra, hissing, and playing dead. Its upturned rostral scale is a unique adaptation for fossorial hunting.