These venomous snakes belong to the subfamily of snakes commonly known as 'pit vipers'. They have a hemotoxic venom that attacks the tissues destroying them. The Mojave rattlesnake is known to have a neurotoxin in its venom, making it the most dangerous species of rattlesnakes. They track their prey using their heat signatures. They have a distinguishing rattle at the end of their tail, that is heard when the snake is irritated and ready to strike.