Iceland Gull Larus glaucoides
February 6th 2004 Choshi Chiba Japan
This individual appeared on the seawall from nowhere, and unfortunately flew away offshore in a few minutes. Several Slaty-backed Gulls on the left and many Vega Gulls on the downstair of the seawall looked obviously taller and larger than this individual. Note the short bill, large eye, longer wings, and short legs. Click here to see the comparison page with a Glaucous Gull.
The folded primaries of the right wing show pigmentation in the center. But when we observe it carefully, we can see that the P7 is curved down and is exposing inside pigmentation of the P8. Identification for glaucoides/kumlieni would not be easy, but at least this individual seems to have many glaucoides-like features.