Southern Hognose Snake, Puff Adder, Hissing Adder, Spreading Adder, Blow Viper, Hissing Sand Snake

Image of Southern Hognose Snake
Rick Owen photo.

Scientific name: Heterodon simus

Description: Average adult size is 14-21 inches (35.5-53.3 cm), record is 24 inches (60.9 cm). It has a thick body and sharply upturned, pointed snout. Adults are light yellowish brown and may be tinged with orange-red, with dark blotches on the back and smaller blotches on the sides. The underside of the tail and the belly are the same light color of sandy gray. There is a dark line extending from the upper jaw through the eye. The scales are keeled, and there are 25 dorsal scale rows at midbody. The pupil is round. Juveniles are grayish with dark blotches.

Image of southern hognose snake headSide view of southern hognose snake's head.
Rick Owen photo.

Underside of tail and body Underside of tail and body are the same color.
Rick Owen photo.

Image of top 
of southern hognose snake head. Image of 
underside of southern hognose snake head.
Southern hognose snake: Left to right: Top of the head; underside of the head (chin and throat).

Image of 
side of southern hognose snake head. Image of 
front of southern hognose snake head.
Southern hognose snake: Left to right: Side of the head; front (face view) of the head.

Range: Uncommon to rare, but occasionally found throughout northern Florida south to Lake Okeechobee. Outside of Florida, it is found from southern Mississippi east to North Carolina.

Habitat: Occurs in sandhills, scrub, high pine and turkey oak woodlands, hardwood hammocks, and dry river floodplains.

Comments: . See comments under eastern hognose snake (Heterodon platirhinos).

It feeds mainly on spadefoot, southern, and oak toads. However, occasionally it may eat other frogs, lizards, and small rodents.

It lays eggs. Breeding takes place between April and August. Males often follow the female around for several days prior to courtship and copulation. They lay between 6-14 whitish, thin shelled, leathery eggs, which hatch in 55-60 days. Hatchlings are 6-7 inches (15-17 cm).

Comparison with other species: Hognose snakes are frequently confused with pygmy rattlesnakes. The eastern hognose snake (Heterodon platirhinos) has a light belly and underside of the tail, and a less upturned snout, and the pygmy rattlesnake (Sistrurus miliarius) has a blunt nose — it is easy to distinguish between the harmless hognose snakes and the pygmy rattlesnake.


Top of this PageGuide to the Snakes of Florida
Checklist of Florida Amphibians and ReptilesFlorida Herpetology

Copyright © 1999, 2000 Florida Museum of Natural History.