American Herring Gull (smithsonianus)(last update: October 30, 2015) |
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American Herring Gull (smithsonianus) 5cy, February 24 2008, St. John's, Newfoundland, Canada. Picture: Bruce Mactavish.Obviously immature. Full sub-terminal black band on P10. Mirror on P9 confined to inner-web. P5 band with characteristic black W-pattern. Rectrices already completely white. Note vestiges of black on centre of primary coverts, an indication of younger adult (5cy / 6cy).
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