Vega gulls Larus vegae
March 19th 2009 Choshi Chiba Japan
A mixed flock composed of Vega Gulls, Slaty-backed Gulls, 1 Glaucous Gull, 3 Black-tailed Gulls.
2 1st winters raising their wings in the center are Vega Gulls. The farthest 1st winter with brown primaries is a Slaty-backed Gull.