Sinosauropteryx
"Sinosauropteryx" was a small bipedal theropod, noted for its short arms, large first finger (thumbs), and long tail. The taxon includes some of the smallest known adult non-avian theropod specimens, with the holotype specimen measuring only in length, including the tail. However, this individual was relatively young. The longest known specimen reaches up to in length, with an estimated weight of .
Dinosaur Walk Museum
Parasaurolophus: The Parasaurolophus, like the T-Rex, lived during the Cretaceous Period 76-66 million years ago. It grew to be long, high, and weighed almost 7,700 pounds. The Parasauolophus was an herbivore. The large crest was thought to be used for communication amongst males and females.