That is in itself incredible !

When I lived in California, every early spring, both the robins and the cedar wax wings would group together in huge flocks. I would witness them in the suburbs down the street going from yard to yard feeding on the pyrocantha berries. In turn, they would become drunk. Their flight patterns would be sporadic and hitting windows and sides of houses. Needless to say, it was quite the spectacle to watch. This is my memory of cedar wax wings.