Then there's also those oft circulated pictures of goannas belly to belly, grasping one another, apparently dancing--no, no that's not it, they're, they're--Fighting! Birds don't do this, but dinosaurs could. Think about two prosauropods doing it--or better yet--two sauropods! Dominance by height? I'm getting too excited. I'd better sit down and take my medicine. DPterosaur