Juvenile Slaty-backed Gull
September 23rd 2001 Hasaki Ibaragi Japan

Especially in photos, individuals that have darker primaries often resemble vegae or smithsonianus.
But usually, they show more uniform tone in the field, and this is more obvious in flight.

Typical short winged individual unlike vegae.

 1st. summer
Apr. 16th 2001

Worn and faded, very different impressions,
compared with juv.in Sep.

Uniform marked individual