Tongues flickering, their heads move back and forth until the scaly skin beneath the throat is touching. The instant physical contact is established, they begin to entwine. The aggressive fighting dance of the two partners is characterized by a gradual, mutual loss of momentum and the beating against each other of their forebodies. The jerkily undulating bodies wind so tightly round each other that the two snakemen merge into a single body whose two heads move back and fro in parallel. The fight is decided when the stronger animal has pressed his opponent down against the floor.