''barrovianus'' Gloucous Gulls
　Larus hyperboreus barrovianus ?

1st winter "barrovianus" Glaucous Gull. With 8 Slaty-backed Gulls.

1w. With 2 Adult Slaty-backed Gulls.

1w. With 2 1w and 1 2w Slaty-backed Gulls.

1w. Note the small and black bill size and long primaries. With Adult SBGU.

2 "barrovianus" Glaucous Gull.

Adult. With 5 SBGU and 1w barrovianus gull.

2nd winter Normal-type Glaucous Gull. With 2w SBGU(background).

From Otanoshike Hokkaido Japan. February 4.