>> Did they live in big herds? Did they take care of the newborn? Did males and females live together? Were the herds lead by a matriarch? MY OPINION: 1. yes 2. possibly 3., 4. no idea HARD EVIDENCE: 1. limited 2., 3. I don't know of any 4. none at all<< Is there any track evidence for herding in brachiosaurs? Or can one tell one sauropod from another by tracks alone? Dan