Heterodon nasicus, commonly known as the Western Hognose Snake, is native to North America, primarily inhabiting grasslands and sandy regions. It is recognized by its upturned snout, used for digging. This species exhibits unique defensive behaviors, such as playing dead and producing loud hissing sounds.

The Heterodon nasicus, commonly known as the Western Hognose Snake, is native to North America. Its geographical distribution spans the central United States, extending into parts of Canada and northern Mexico. In the United States, it is predominantly found in the Great Plains, stretching from southern Canada through Montana, North Dakota, South Dakota, Nebraska, and down to Texas and New Mexico. It is also present in some parts of the western Midwest.

The Western Hognose Snake typically inhabits dry, open areas such as grasslands, prairies, and semi-arid regions. It favors sandy or loamy soils that are easy to burrow into, as it often digs to find prey or escape predators. The climate in its habitat ranges from temperate to arid, with hot summers and cold winters.

Heterodon nasicus is a diurnal species that primarily feeds on amphibians, particularly toads, which it is specially adapted to consume thanks to its resistance to their toxins. It plays a role in controlling amphibian populations and contributes to the ecosystem as both predator and prey. The snake is also known for its distinctive defensive behaviors, such as playing dead or flattening its body to mimic a cobra, which are adaptations to its ecological niche.