Erayga "Hadrosauridae" waa erey cilmi ah oo loo isticmaalo in lagu tilmaamo qoys ka mid ah dinosaurs herbivorous oo noolaa xilligii Late Cretaceous, qiyaastii 100 ilaa 66 milyan oo sano ka hor.Qoyska Hadrosauridae ayaa sidoo kale loo yaqaanaa. Dinosaurs-yada "duck-billed", sababtoo ah sanqadhyadooda fidsan ee u eg biilka shinbiraha. Dinosaurs-yadani waxay ahaayeen afar-geesood, oo lugaha hore ku leh ciddiyo qoobab u eg iyo lugaha dambe ee suulasha webiga. Waxa kale oo ay caan ku ahaayeen awoodda ay u leeyihiin inay calaliyaan oo farsameeyaan walxaha dhirta adag, taas oo ay ugu wacan tahay qaab-dhismeedkooda ilkaha ee gaarka ah.Magaca "Hadrosauridae" wuxuu ka yimid erayada Giriigga "hadros," oo macneheedu yahay "weyn" ama "weyn" " iyo "sauros," oo macneheedu yahay "qorraxda." Qoyskan dinosaurs-ka ah waxa ku jira tiro ka mid ah hidde-yaqaannada caanka ah, sida Hadrosaurus, Edmontosaurus, iyo Parasaurolophus.