Thayer's Gull
s Larus thayeri
February 24th 2005 Choshi Chiba Japan
(4 adults were found among Vega Gulls.)

87A (center) This bird was found in 1987

87B The most famous bird found in 1987.

This is the same bird as this found in 2002.

02B This was also found in 2002. Note the grayer primaries compared to surrounding Vega Gulls.

The primary pattern is approaching dark kumlieni. If this bird is in east coast of North America, would it be called a Thayer's Gull?