Dinosaurs are only one of the many groups of reptiles that have ever existed. It is normal use in biology to classify species in the same group as the group of

Dinosaurs are only one of the many groups of reptiles that have ever existed. It is normal use in biology to classify species in the same group as the group of their ancestor species. So, whether you like it or not, humans are mammals and primates. There really are no sound biological reasons to exclude birds from belonging to the group of dinosaurs.