- the tone of the adult-like upperpart feathers was clearly paler than that of Laughing Gull.
- the advanced bill pattern is very odd for such a young-looking bird.
- the legs have a pale yellow-ochre tone.
- many of the wing coverts have a large whitish base with diamond-shaped black tip, creating a marbled effect.
- in profile the wings look broad and rather blunt-tipped.
- the inner webs of most primaries are paler than the blackish outer webs.