Knowing where this was going, I looked up. It took me quite a while to spot him as he was really high up, hiding behind all the leaves and it took me a lot longer to get a halfway decent picture. At that, I still could only get his silhouette so you'll have to take my word for it that it was indeed a hawk.
Hawks are one of my favorites. They get rid of some of the rodents (where was he when the big rat was running around?) and also keep some of the nuisance birds in check. They're welcome to catch and eat their lunch in my yard anytime.