In this shot the face is darker still, and at times in the distance on the water the bird did appear to have a dark mask. Once again, the cold grayish tones are evident, along with the very pale nape and bold barring on the undertail extending up the flanks some.

Structure is very important in Jaeger identification. It is hard to note well in my photos, but notice in this profile how stubby the bill looks, and about 1/2 black. Parasitic is closest in structure, but has a slightly longer, thinner bill, with more pale at the base. The head is nicely rounded. In flight the structure is important, with Long-tailed being the narrowest-winged of the Jaegers, with the projection of the tail behind the wings being greater than the width of the wing base.