(TEN-onn-toe-SORE-us)
Plant-eater
20 feet long
Early Cretaceous, 115 million years ago
Western North America
Tenontosaurus was the most common dinosaur in its world. Like a cow it was built to graze on low-growing plants. Tenontosaurs were the favorite lunch food for Deinonychus. Tenontosaur bones are found near four out of every five Deinonychus discoveries.
