Habitat (IMAGE) Yale University Caption By examining the type of rock in which dinosaur fossils were embedded, paleontologists discovered that hadrosaurs or duck-billed dinosaurs preferred to live along the edge of rivers, while ceratopsians, which include the well-known Triceratops, preferred to be several miles inland. Credit Nicholas Longrich/Yale University Usage Restrictions With credit given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.