Parasaurolophus:  This was a huge plant-eating hadrosaur that weighed as much as a full-grown African elephant. Scientists believe these animals produced sounds by forcing air through the hollow crests on their heads.

Genus Name: Parasaurolophus ("like Saurolophus lizard")
Type Species: * P. walkeri (Parks, 1922)
Length: 33 feet (10 meters)
Weight: 3-4 tons
Time: 76-65 million years ago (Late Cretaceous)
Place: Alberta (Canada), Montana, New Mexico
Diet: plant-eater (herbivore)