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second cycle

Fig 1) This bird spent several winters in San Jose, California. Other pics, in its fourth year, can be seen at this page. As an adult, some wondered if it may be heuglini due to its late moult and rather dark mantle. However, Lesser Black-backed Gulls in the US typically have a late moult similar to heuglini. Photo by Ron Saldino. November, 1997, San Jose, California.