Within the Heterodon genus there are currently 3 described North American hognose species:
Eastern hognose (Heterodon platirhinos)
H. platirhinos can be found around the eastern half of the US and in some parts of southern Canada. They prefer sandy, well-drained soil, but can be found in pine and deciduous forests, prairies, meadows, and pastures. They are the largest member of Heterodon, with males measuring between 28-46” (71-117 cm). Females grow even larger. They are considered a species of Least Concern by the IUCN Red List.
Eastern hognose are also the most colorful of the three Heterodon species. Depending on the locality, they come in red, orange, yellow, brown, black, and even green. The underside of an Eastern hognose’s tail is lighter than its belly, and the snake’s pattern tends to feature darker spots and blotches against a lighter background; however some are so dark that they’re almost patternless. Unlike the other two species, Eastern hognose also have a flat nose scale rather than curved.
Eastern hognoses are almost exclusive toad eaters in the wild. For this reason they can be tricky to feed as pets, so we recommend them for Intermediate reptile keepers.
Western hognose (Heterodon nasicus)
H. nasicus is the most popular member of Heterodon in captivity. They can be found around the western half of the US, from southern Canada to northern Mexico. They prefer shortgrass prairie (grassland), dry rocklands, and coastal inland areas with sandy soil.
Wild western hognose are fairly uniform in appearance, although there are many color and pattern variations (morphs) available in captivity. Normal types are sandy colored with darker brown round or oblong markings, occasionally reddish. Their belly is black, sometimes with yellow or white spots. The nose scale is curved. Males measure 17-24” (45-60 cm) at adulthood, and females measure up to 35” (64 cm).
According to IUCN Red List, the Mexican hognose — previously referred to as H. kennerlyi — is technically H. nasicus, not a separate species. They are considered a species of Least Concern.
Western hognose have a very diverse diet in the wild, and are well suited to Beginner reptile keepers.
Southern hognose (Heterodon simus)
H. simus is the hardest to find in captivity, although there are a few isolated breeders in the US. They are native to parts of the southern US, with populations in South Carolina, North Carolina, Georgia, and Florida. They prefer sandhill, rand ridge, pine flatwood, and coastal dune habitats with sandy soil. Populations of H. simus are declining, so they are listed as Vulnerable on the IUCN Red List.
Southern hognose are gray, tan, or reddish in color with series of dark brown blotches down the center of the back, with alternating smaller blotches along the sides. The underside of the tail is the same color as the belly. Southern hognose are the smallest Heterodon species, with males measuring between 14-20” (35-50 cm) and females measuring up to 24” (61 cm).
Southern hognose are also almost exclusive toad-eaters, so they are better suited to Intermediate reptile keepers.