Some have told me this a Common, Foster's or Caspian Tern...so this guy is way cool to watch. After he leaves water, almost always with fish, he does this cool shiver. Lucky to catch them do so, and in some shots their heads look they are on backwards. Have seen 3 at a time fishing. Most ever of several different birds. Saw 6 GBH...3 Egrets....in 1 visit alone. Best day ever.