Is There a Change With the Life Cycle of Dinosaurs?

We used to think it would be like different species. It's possible that some animals who thought that were different species were actually just different ages of the same species. So camouflage is really only necessary depending on your life cycle. If you're so big, like did the long neck dinosaurs, like the sauropods, they didn't have to be camouflage. Their size was their defense and they're not going to hide from anybody.