(CNN) -- North Carolina park officials worried some people with a June 6 Facebook post about zombie snakes.
Luckily, there's nothing to worry about. The state's Division of Parks and Recreation was just sharing information about the eastern hognose snake's habit of playing dead.
Similar to an opossum, the eastern hognose, which can grow up to about 20 to 33 inches long, will often roll onto its back, convulse and then lie motionless with its tongue hanging out when threatened.
Sometimes, the snake will instead hiss and inflate its neck like a cobra to try to scare away predators. This behavior earned eastern hognoses the nickname "puff adder."
You can relax, though, because eastern hognose snakes aren't vipers. They are not venomous and don't bite.
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