Parasaurolophus is a dinosaur species that existed during the Late Cretaceous period, about 76 to 73 million years ago. It belonged to a group called hadrosaurs or “duck-billed dinosaurs.” One of its most distinctive features was its crest, which extended backward from its skull. This crest was hollow and could be up to 6 feet long in some individuals.

Scientists believe that the crest of Parasaurolophus played a role in communication and helped produce loud trumpet-like sounds. The inside of the crest had complex air passages that allowed it to amplify sounds, making the dinosaur’s calls travel over long distances.

Parasaurolophus had a long neck, a long tail, and walked on four legs. It reached lengths of about 30 to 40 feet and weighed around 2 to 3 tons. As a herbivorous dinosaur, it primarily fed on plants such as leaves and fruits.

Fossils of Parasaurolophus have been found in North America, specifically in places like Alberta (Canada), Montana, and Utah (United States). These fossils have provided valuable information about the anatomy and behavior of this dinosaur species.