February 3rd 2007 Choshi Chiba Japan
A typical advanced 1st winter. Note the post-juvenile
scapulars, strongly worn tertials/coverts, and whitish head-breast.
A rather uniform individual.
A fresher individual, upperparts mostly juvenile plumage.
Note the abnormally short P9. This P9 might be the 2nd
generation which came up instead of the lost juvenile P9 in
Male-type (left), female-type (right). Both have heavily worn
tertials and coverts, unlike Vega Gulls.
The scapulars and coverts resemble smithsonianus. But
note the stubby overall structure, brownish short primaries
and deep pink legs.
A relatively whitish individual, mostly worn juvenile plumage
but some mantle and upper scapular feathers.