Hognose snake

Hognose snake is a common name for several colubrid snake species with upturned snouts. They include three distantly related genera:

The North American Heterodon species are known for their habit of thanatosis: playing dead when threatened.

Genus Heterodon:

Genus Leioheterodon:

Genus Lystrophis:

Hognose snakes' most distinguishing characteristic is their upturned snout, which aids in digging in sandy soils by using a sweeping, side to side motion. They also like to burrow in masses of humus. Lieoheterodon species are known to dig up the eggs of lizards.

Hognose snakes are extremely variable in color and pattern. Heterodon nasicus and H. kennerlyi tend to be sandy colored with black and white markings, while H. platirhinos varies from reds, greens, oranges, browns, to melanistic (i.e. black) depending on locality. They are sometimes blotched and sometimes solid-colored. Leiohetereodon geayi is a brown or tan colored snake with dark speckling on it. Leioheterodon madagascariensis is typically green and yellow with a black checkerboard pattern along its back. Leioheterodon modestus is normally a gold-brown color. Some species in the genus Lystrophis are referred to as tri-color hognose snakes and sometimes as false coral snakes because they display alternating bands of red, white, and black.

Leioheterodon are the largest of the hognose snakes, capable of reaching lengths of 1.8 m. Heterodon platirhynos gets slightly larger than other species of the genus, reaching lengths of 80 cm, where other species in the genus as well as Lystrophis species usually average around 65 cm at adult size.

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