Opossums are the only marsupial native to North America! A marsupial is a mammal that raises its offspring in an external "marsupium" or pouch. The babies are born in an underdeveloped state and must spend the rest of its development inside the mother's pouch before it is ready to exist on the outside world. These remarkable creatures have a number of cool adaptations! Its tail is prehensile. A prehensile tail is adapted for grasping and wrapping around things like tree limbs. The opossum can hang from its tail! The opossum has opposable hallux. Hallux are clawless big toes that work like thumbs. The Virginia opossum has many behavioral adaptations it uses to survive. Sometimes it will "play 'possum." and roll over, become stiff, drool, and its breathing will become slow and shallow: This coma-like state can last up to four hours. Some predators will think the opossum is dead and go away!