4. Eastern Brown snakes
These lil' critters are the 2nd most venomous snakes in the world. They slither up the entirety of the east and north coasts, and prefer to take up residence in barns and homes in the suburbs. Although the snake isn't typically looking for trouble, when provoked the'll crane their necks into an abnormal, ungodly contortion, and chase you around the yard until they bite you, which will inflict a terrible pain that'll make you double-over, s*** your pants, paralyze you, and, eventually (if untreated), kill you.