I thought of this when I was in the pet store up the street from me this morning...all they have are budgies in a glass cage in their high ceiling store. All the budgies were clipped.The small birds are not clipped from what I could tell. Budgies, finches and I think even the cockatiels aren't clipped. The few Rosellas I've seen weren't clipped either. Conures on up are the birds usually clipped. It probably varies depending on store policy but usually the smaller birds aren't clipped. Now that you bring this point up I'm going to be more aware and see which birds are and which aren't. I usually don't pay as much attention to the smaller species.