This fella made me come to a stop right in the middle of the road today! He was desperately trying to catch a VGSW/TRSW on the wing and the swallow was twice as desperately trying every acrobatic trick he knew to save his skin. They wheeled around and around for quite some time like a couple of planes in a dog fight. There were a couple of really close shaves but I think the hawk must have finally used up his available spurt of energy and gave up the chase. By the time I got turned around and got off on the shoulder he had perched himself there to wait for easier prey. Leaning cooper's based on 'cap' and eye so far forward.