Western Hog-nosed Snake
Heterodon nasicus • Order: Squamata, Suborder: Serpentes, Family: Dipsadidae, Subfamily: Dipsadinae, Genus: Heterodon, Species: Heterodon nasicus
North America, primarily ranging from southern Canada through the central United States down into northern Mexico, inhabiting grasslands, prairies, and semi-arid regions.
Look up Western Hog-nosed Snake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Dipsadidae, Subfamily: Dipsadinae, Genus: Heterodon, Species: Heterodon nasicus
Conservation
IUCN Red List status is Least Concern. Populations face local threats from habitat loss due to agriculture and urban development, as well as road mortality.
Physical Description
Features a distinctive upturned snout used for digging, a thick-bodied build, heavily keeled scales, and a patterned coloration consisting of dark blotches (brown, gray, or black) over a lighter yellowish, gray, or tan background.
Size & Dimensions
The provided specimen is approximately 6 inches long, indicating a juvenile. Typical adults reach lengths of 15 to 33 inches (38 to 84 cm), with females generally growing larger than males.
Habitat
Typically found in open, dry areas with sandy or gravelly soils, including prairies, river floodplains, semi-arid brushlands, and agricultural fields. Microhabitat preferences include areas suitable for burrowing.
Diet & Feeding
Specialized diet focusing heavily on amphibians, particularly toads. Uses an active foraging and probing strategy, locating buried prey with its upturned snout.
Reproduction
Oviparous species. Mating typically occurs in the spring after emerging from brumation. Females lay clutches averaging 4 to 23 eggs, usually in underground nests during the early summer.
Look-alikes
Frequently confused with other prairie-dwelling snakes such as gopher snakes (Pituophis catenifer) and rattlesnakes due to its blotched pattern and defensive behaviors, but easily distinguished by the upturned rostral scale.
Conservation Status
IUCN Red List status is Least Concern. Populations face local threats from habitat loss due to agriculture and urban development, as well as road mortality.
Cultural Significance
Known widely in popular culture and herpetology for its dramatic defensive displays, including hissing, flattening its neck like a cobra, and playing dead (thanatosis). Serves an important ecological role in controlling amphibian populations.
Notable Features
Possesses a modified rostral scale on the tip of the snout that is sharply upturned, acting as a miniature plow for excavating soil and unearthing buried prey.
Notes
6 inches long