Dinosaurs likely communicated using a combination of vocalizations, body language, and possibly even colors. Some species, like the Tyrannosaurus rex, may have used low-frequency sounds to communicate over long distances, while others, such as smaller dinosaurs, might have relied on higher-pitched calls. In addition to sounds, dinosaurs could have used their physical appearance to convey messages. For example, the Stegosaurus had plates on its back that might have been used for display or signaling to others. Overall, dinosaur communication was likely complex and varied among different species.