Reptiles communicate primarily through body language, colors, and sounds. For example, a chameleon may change its color to signal aggression or attract a mate. Many reptiles also use physical displays, such as puffing up their bodies or performing specific movements to establish territory or deter rivals. In addition to visual signals, some reptiles produce sounds. Snakes may hiss or rattle to warn predators, while lizards can make chirping noises during mating rituals. These forms of communication help reptiles interact with each other and navigate their environments effectively.