A significant number of brown juvenile scapulars remain. Note the shape of the solid dark centers to median coverts. Slightly out of focus and over-exposed view of the very distinctive tail pattern. In flight, showing uppersurface of the wings and mantle. Outer primaries and primary coverts very dark brown.
Inner primaries are gray with dark 'drops' near the tips.
These tend to be larger in Ring-billed Gull. The secondary bar is dark. Subdued and relatively ill-defined brown carpal bar. Pale gray hindneck separated from mantle by an dark collar. Overall less contrast across the wing than typical for Ring-billed Gull.