Glaucous-winged Gull
Adult Glaucous-winged Gull (Larus glaucescens) in basic plumage at Canal Park, Duluth, Minnesota, December 2011. Discovered by Karl Bardon on the 22nd, this represents a potential fifth state record and the third for St. Louis County. Relatively rounded head shape and modest bill with minimal swelling at the gonys suggests female gender. Note dark distal mark on bill which is typical for GWGU, but not for Kumlien's [Iceland] Gull in winter. Also note dark brown irides, smudgy wash of gray-brown rather than distinct streaks on head, slightly darker gray mantle shade compared to adult American Herring Gull, broad white tertial crescent on perched bird, gray on wing tips perfectly matching mantle shade, very short wing projection past tail tip, broad inner wing (arm) with broad white trailing edge in flight, subterminal mirror on p10 and small mirror on p9, white subapical tongue tips on p6-p8 showing as a row of white spots on both wing surfaces, and tiny gray marking on p5; the latter is typical for glaucescens but not for kumlieni.
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