A cave was of interest to all dinosaurs. If the cave was big enough, it was a good place to hide from enemies. The predatory dinosaurs of course knew this and looked for prey there. A Quetzalcoatlus circles above the cave and waits for an incautious young animal that it can sweep down on. A Carnotosaurus is also waiting for the right moment to strike. Watch out, little dinosaur, that none of the robbers get you.