New Jersey is home to some 24 snake species, many of which may look dangerous to humans. However, most are ultimately beneficial in the capture of rats and mice. Common non-venomous snake species include the Black Racer, Eastern Garter Snake, Milk Snake, Black Rat Snake, Eastern Ribbon Snake, Eastern Hognose Snake, Scarlet Kingsnake, and the Northern Water Snake which is commonly confused with the Copperhead. The Corn Snake is also present in New Jersey but it is an endangered species.
Poisonous Snakes: Northern Copperhead and the Timber Rattlesnake
New Jersey is home to two types of venomous snakes. The Northern Copperhead, and the Timber Rattlesnake (Endangered). They are in the family of pit vipers. The venom of these snakes is haemotoxic, that is, it destroys the red blood cells and the walls of the blood vessels of the victim.
You can read more about New Jersey snakes here.
NOTE: If you find a snake and you do not know whether or not it is venomous, the safest thing to do is to leave it alone and call Harbor Wildlife Control trapping professionals. If you or someone else is bitten by a poisonous snake, you should immediately seek medical attention at the nearest hospital or medical facility.