Eastern Hognose Snake
Heterodon platirhinos • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Dipsadinae, Genus: Heterodon, Species: Heterodon platirhinos
Venomous Status
Mildly venomous (Rear-fanged/Opisthoglyphous)
Danger Level
Harmless/Low Risk. While they possess mild venom, they are extremely reluctant to bite humans and lack an effective delivery system for significant envenomation.
Geographic Range
Found throughout eastern North America, ranging from southern Ontario, Canada, through the eastern United States from New Hampshire to Florida, and west to Texas, Kansas, and South Dakota.
Conservation Status
Least Concern (IUCN). However, threatened locally in some northern ranges due to habitat loss and decline in amphibian populations.
Physical Description
Features a heavy, thick body with a highly characteristic upturned (hog-like) snout. Coloration is highly variable; this specimen displays a high-contrast pattern of dark brown to black dorsal blotches on a lighter tan/orange background. Scales are keeled.
Size & Dimensions
Specimen appears to be an adult approximately 50-70 cm long. Species typically ranges from 50 to 85 cm, with a maximum record of about 115 cm.
Habitat
Inhabits areas with sandy or loose soils including woodlands, field edges, coastal areas, and prairies. They are primarily fossorial and terrestrial, found at elevations from sea level to over 700 meters.
Behavior & Temperament
Renowned for elaborate defensive displays including flattening the neck like a cobra, hissing loudly, and 'puffing up'. If further provoked, they famously 'play dead' (thanatosis) by flipping onto their backs and letting their tongues hang out.
Diet & Feeding
Specialized toad-eaters. They use their upturned snout to dig for prey and enlarged rear teeth to puncture inflated toads, making them easier to swallow. They also consume frogs and occasionally salamanders.
Reproduction
Oviparous (egg-laying). Females lay clutches of 8 to 40 eggs in sandy soil during early summer, which hatch in late summer or early autumn.
Venom Profile
Venom Type
Mildly toxic saliva specifically adapted for amphibians; contains proteolytic properties but is not considered medically significant to humans.
AI-generated — see a qualified source if acting on this. For any snakebite, call emergency services immediately.
Look-alikes
Often confused with Pygmy Rattlesnakes (Sistrurus miliarius) or Copperheads (Agkistrodon contortrix) due to body shape; distinguished by the unique upturned snout and defensive 'playing dead' behavior.
Conservation Status
Least Concern (IUCN). However, threatened locally in some northern ranges due to habitat loss and decline in amphibian populations.
Cultural Significance
Ecologically vital for controlling toad populations. Often feared by the public due to their 'cobra' display, leading to the nickname 'Spreading Adder' or 'Blow Viper,' though they are benign to humans.
Notable Features
Possess specialized adrenal glands that allow them to handle the toxins found in the skin of the toads they consume. Unique morphological adaptation of the rostral scale for digging.