Out on the Boardwalk (0.3miles). Noting that there was a lot of Terns. I took some pictures. Then some people go on by. So I start over waiting for a couple more groups. Patients, and moving slow I head out again. This Sentinel kept me at about the same distance away, over, and over. This is a molting Black Tern, and I have some more images in different stages of molting. Those Juveniles are usually easy to approach if your lucky.