Parasaurolophus

Parasaurolophus was a duck-billed dinosaur that roamed western North America around 76 million years ago. It stood out with its long, curved head crest, which may have been used for communication. This hefty plant-eater could walk on two legs or all fours.

• Grew over 9 meters long and weighed more than 5 metric tons.
• Had a distinctive tubular crest up to 1.8 meters long on its head.
• Three known species: P. walkeri, P. tubicen, and P. cyrtocristatus.