The xénomorph or Alien

The xénomrph's way of born is very special : a queen ley egges in a human body. After that, the egg become a facehugger (ref: alien eternity)
He huge you at the face and eat you to become a real adult alien. When the human die, the alien become a chestburster. He get out of the body by blew up the chest of the victim. And then, the chestburster become a real big alien taller than 2 m. the only human team who can destroy these montser are the GhostBuster i believe.