apatosaurus leading its herd in a gentle migration across rolling landscape, showcasing social behavior

apatosaurus herd migration dinosaurs social behavior prehistoric jurassic cretaceous reptile landscape rolling hills nature wildlife ancient gentle mesozoic herbivore fauna movement peaceful evolution extinct large animals environment grazing group community natural together interaction travel journey survival primal scenery terrain tranquil majestic herdleader leading peacefulmigration wildlifephotography dinosaurscene prehistoriclandscape slowmoving reptiles earth creatures closeknit family bond prehistoriccreature ecosystem naturalworld earthscape socialinteraction travelingherd paleontology largeherbivore creature primalworld togetherness migrationpath ancientanimals massive dinosaurherd landscapephotography prehistory groupbehavior wilderness natural