Plains Hog-nosed Snake
Heterodon nasicus • Order: Squamata, Suborder: Serpentes, Family: Dipsadidae, Subfamily: Dipsadinae, Genus: Heterodon, Species: H. nasicus
North America, spanning from southern Canada, through the Great Plains of the United States, down into northern Mexico.
Look up Plains Hog-nosed Snake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Dipsadidae, Subfamily: Dipsadinae, Genus: Heterodon, Species: H. nasicus
Conservation
Evaluated as Least Concern on the IUCN Red List, though local populations face threats from habitat fragmentation, agricultural conversion, and road mortality.
Physical Description
Features a distinctive upturned snout used for digging, heavily blotched dorsal pattern with dark brown or black spots over a tan, gray, or yellowish background, dark stripes on the sides of the head passing through the eyes, and keeled scales.
Size & Dimensions
The pictured specimen appears to be a juvenile measuring roughly 25 to 30 cm in length. Adults typically range from 40 to 65 cm, with females growing significantly larger than males.
Habitat
Found primarily in arid and semi-arid regions, prairies, sandy plains, floodplains, and agricultural areas where loose or sandy soils allow for easy burrowing.
Diet & Feeding
Specialized feeder that preys primarily on amphibians, particularly toads, using specialized rear teeth to puncture inflated prey and an active foraging strategy.
Reproduction
Oviparous species that mates in spring and typically lays clutches of 4 to 23 eggs in underground nests excavated in loose soil or sand during summer.
Look-alikes
Frequently confused with other hog-nosed species such as the Eastern Hog-nosed Snake (Heterodon platirhinos) or rattlesnakes due to defensive behaviors and dorsal patterning, but distinguished by the distinct underside coloration and scale counts.
Conservation Status
Evaluated as Least Concern on the IUCN Red List, though local populations face threats from habitat fragmentation, agricultural conversion, and road mortality.
Cultural Significance
Renowned for elaborate defensive displays including playing dead, hissing, and flattening the neck like a cobra, making them popular in popular culture and reptile keeping while serving an important role in controlling amphibian populations.
Notable Features
Possesses a modified rostral scale forming an upturned shovel-like nose adapted for burrowing in sandy soils and an extensive repertoire of dramatic defensive behaviors.