The most common dinosaur found on the Island is Iguanodon, a plant-eater the size of a bus that travelled in herds, across the floodplain. Nearly all the bones found on the Islands beaches belong to this dinosaur. If a small scrap of bone is found that cannot be identified properly, we often regard it as Iguanodon, because it probably is.

The main threat to an Iguanodon was the fearsome Neovenator; a meat-eating dinosaur the same size. With sharp serrated teeth, it could bite mouthfuls of meat from its prey. It was probably the top of the foodchain; with few rivals once it was fully grown. Neovenator was a fast sleek hunter similar to Allosaurus from North America.

Even Neovenator would have had a problem trying to catch the small and fast plant-eater Hypsilophodon. Around 1.5 metres to 2 metres long, like its larger relative Iguanodon it travelled in herds, which would have made it harder to catch and kill.

The only dinosaur Neovenator probably couldn't kill even if it could catch it, was the Barnes High Sauropod, a Brachiosaur-like plant-eater. As long as two buses and as tall as a house, it travelled in herds but never stopped here for long. These giants migrated as far afield as Cornwall, Portugal and Southern France. Occassionally one of them would die on the route, and leave their remains for us to find. This is what we think happened to the Barnes High Sauropod discovered in 1992.

There are several types of dinosaurs found here that are only known from one or two bones. These include the small Theropods Aristosuchus and Ornithodesmus; and the Sauropods such as Iuticosaurus, Eucamerotus and Ornithopsis.