Although not the most commonly depicted dinosaur in media nowadays, the Parasaurolophus certainly is pretty famous because of its unique crest. Paleontologists think that the Parasaurolophus, unlike many other crested dinosaurs, had the crest not only as a mating display but also as a form of communication. Paleontologists believe that the inside of the crest acted as a resonating chamber, and the creature would be able to release a deep honking noise, somewhat resembling a trumpet. The Parasaurolophus is one of the only dinosaurs that paleontologists know the sound of, and there's even an interactive display at the Chicago Field Museum for visitors to listen as well! Because the crest also acted as a mating display, paleontologists believe they should be more colorful than the rest of the body, which is depicted quite correctly in the media. For example, the Jurassic Park parasaurolophus has a fairly bland body color but a different color on the crest. Now, take a look at the more colorful, trumpet-like crest in my up-to-date depiction above. Remember, it is likely both a mating display and a form of communication!

However, one inaccuracy of the Parasaurolophus that Jurassic Park displays lies in its stance. Although we know that the creature can move bipedally and quadrapedally, paleontologists believe that they would often move quadrapedally, and they would likely use their bipedal stance mostly only when running as it would put too much strain on the front legs. In contrast, we see the Jurassic Park Parasaurolophus move on two legs during most of its appearances, even when standing still.