Complete skeletons also indicate limited transport by water or wind from the place the dinosaurs died.The complex social behaviour in early dinosaurs observed in this research lines up with other fossil evidence that dinosaurs were more bird-like than crocodilian-like.
A vast trove of fossils unearthed in Argentina's southern Patagonia region is offering the oldest-known evidence that some dinosaurs thrived in a complex and well-organized herd structure, with adults caring for the young and sharing a communal nesting ground.
The animals were found to have been grouped by age at the time of their deaths, with hatchlings and eggs in one area while skeletons of juveniles were clustered nearby.