Feb. 28th 2009 Choshi Chiba Japan
At least 8 Thayer's Gulls were found on the day. Usually 5-10 birds can be found in one day this winter. They seem to be increasing in recent years.
Adult
2nd winter
The molt is advanced for 2nd winter. Some wing coverts and P1-P2 are new.
2nd winter
1st winter
A very fresh individual for this time of year, mostly juvenile plumage.
1st winter
1st winter
1st winter
A relatively breached bird.