Alberta Hadrosaurs Alberta is the richest area in the world for hadrosaur remains. They were first identified in 1881, when Richard McConnell found a duckbill's thighbone in pieces in a coulee near Nobleford. Fragmented bones had been found even earlier along the Milk River, but they had not been properly described. Since then, many specimens have been recovered from locations ranging from Grande Prairie to Manyberries. Among the Alberta hadrosaurs, a striking separation seems to exist between coastal forms and upland forms.
Similar distinctions are seek in the ceratopsians as well.
Fossil duckbilled dinosaurs are often identified by their crests. Living hadrosaurs may have used the crests for identification too. Males and females had crests of different sizes, while the crests were undeveloped in juveniles. Duckbills, Flat Heads Brachylophosaurus , a typical flat headed duckbill dinosaur. Duckbilled dinosaurs have been grouped into two sub-families on the basis of features in the skull and skeleton.