This red-shouldered hawk appeared in our yard in November of '05 for a week or two, but the blue-jays flushed it out and it disappeared. Much to our surprise, it showed up again in '06 and has been here off and on ever since.
For the longest time, I was certain that this was a red-tailed hawk. This is partially because I'd been trying for ages to get pictures of a red-shouldered hawk and couldn't imagine I had such easy and immediate access to one and partially because, being a juvenile, it's a tricky identification for a newer birder.
Personally, by the way, I put this particular picture down as one of the best I've ever taken.