The hood was complete and convex into breast, although the photo does not show this well.
Wing coverts show much gray.
Note the gray of the hood is noticeably darker than the brown of the back. I noted a dark form behind me and to my left. This one was a juvenile Pomarine Jaeger. Have many photos of both species and Jeff has photos as well as some video. I am absolutely positive on the identifications, and the photos should tell the rest.