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adult
Ring-billed Gull


Fig 1) A typical adult in winter. Note the pale gray mantle with no strong tertial crescent-- an easy way to separate them from other species at long range. Photo courtesy of Don DesJardin.

Fig 2) This bird is already showing a bright orbital ring associated with breeding. February 16, 2013. Petaluma, California. Photo by Steve Hampton.



Fig 3) Adult Ring-billed Gulls in flight can be recognized from a distance by the extensive black area on the outer primaries. January, 2006. Huntington Beach State Park, South Carolina. Photo courtesy of James Rivers.
Fig 4) This bird has more sparse head streaking. Again, not the lack of a clear tertial crescent. December 17, 2011. Davis, Calfornia. Photo courtesy of Steve Hampton.

Fig 5) A late winter adult, still with some head streaking. March 23, 2011. Clearlake, Calfornia. Photo courtesy of Steve Hampton.

Fig 6) This photo was taken the same day as the previous photo, only this bird is already in full breeding plumage. Note the vivid bare part colors: the red eye ring and bright bill and legs. Again, note the virtual lack of tertial and scapular crescents. March 23, 2011. Clearlake, Calfornia. Photo courtesy of Steve Hampton.