L. thayeri, Thayer's Gull (?)
I took some photos of this bird on March 12, 1995 at Hatteras. Is it a Thayer's or an Iceland? Or maybe an intermediate form? The tertials were quite pale, but is that just the result of wear, keeping in mind the date? Other factors seem to indicate Thayer's.
There is a discussion of this bird on the responses page.
Then below is a photo of an adult Thayer's taken in early April 1997 on Staten Island, New York.
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Note also the immature Herring Gulls' wing and tail pattern.
Note also the immature Herring Gulls' wing and tail patterns.
Note tail pattern and secondary bar.
Staten Island, April 1997.
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