They communicate in the same ways that most snakes do. They use their eyes to detect motion, and if it is sudden they will attack. They 'see' with their tongue by collecting air particles and then putting them on an organ in their mouth. The organ senses what is around them with the air particles. They do not have ears on the outside of their body, but they can sense vibrations in the ground. Like many other snakes, if they are threatened, they will show aggression and signals that warn the attacker.