For the latest study, accepted for publication in the journal Cretaceous Research, Lee and his colleagues focused on the pterosaur tracks. The scientists identified a total of 64 imprints made by five to six individuals that “show a clear quadrupedal gait pattern” with feet bearing curved “hook-like sharp” claws.
“The high density of the tracks suggest gregarious behavior, but the random orientation of the trackways does not show that they were moving in the same direction as a herd,” Lee said.
He and his team instead think the pterosaurs and birds randomly gathered to feed. The eating marks consist of “small round depressions on the slab,” possibly where the animals repeatedly pecked away for food.