 Some species of ceratopsians , especially Centrosaurus and its relatives , appear to have been gregarious , living in herds . This is suggested by bonebed finds with the remains of many individuals of different ages . Like modern migratory herds , they would have had a significant effect on their environment , as well as serving as a major food source for predators . 
 Some species of ceratopsians , especially Centrosaurus and its relatives , appear to have been gregarious , living in herds . This is suggested by bonebed <a href='uninflect' title='1'><mark>finds</mark></a> with the remains of many individuals of different ages . Like modern migratory herds , they would <a href='been_done' title='2'><mark>have</mark></a> had a significant effect on their environment , as well as serving as a major food source for predators . 
Some species of ceratopsians , especially Centrosaurus and its relatives , appear to have been gregarious , living in herds . This is suggested by bonebed find with the remains of many individuals of diff ages . Like modern migratory herds , they would done had a significant effect on their environment , as well as serving as a major food source for predators .