The big crook in the wings is easy to recognize, and in your picture you can see the black stripe on the cheek. They live near water, and once you hear them a few times, their call is easy to remember. A lot of times you'll hear them before you see them
Wonderful shots! I especially like the one landing. Whenever I sit outside taking pictures it amazes me all the birds I see, especially flying over in groups. Robins the other day, and several time I have seen Swallows, but they are traveling too fast for a shot.
This photo was taken in April, 2006 at Centennial Lake, Columbia, MD. The distance that the Osprey travel each year is amazing as well as their respective routes. And, then to find their way back. The following link illlustrates this phenomenon.