This sub-adult LBBG-type gull was at Brevard Landfill, FL on January 27, 2010; even allowing for the fact that the primaries are not adult type, they appear to be extremely faded and a bit worn - compared to the adult LAGU in front and all 2cy, 3cy, and subadult LBBGs I looked at in Florida that week (n = c.35) - i.e. it appears that they may have been replaced much earlier than is typical?:
