The Forester’s TernSterna forest, like many other terns, has a black cap during breeding season and more white on the head during non-breading season. Front-on (2886) Forester's Tern looks like it iis wearing a Long Ranger Mask.
Photo 6676 shows a Forester’s Tern taken in California showing the whole crown in black and orange bill with a black tip.
The remainder of these photos were taken on Solona Beach in Late March showing a white or grey crown and black bill typical of non-breeding Forester’s Terns.