1st winter
Thayer's Gulls
 Larus thayers
February 28th 2012 Choshi Chiba Japan

I counted 16 Thayer's Gulls (including some presumed thayeri-kumlieni intergrades/hybrids) in one day. Gulls in Choshi are decreasing in these years, but strangely Thayer's Gulls clearly seem to be increasing. This page shows 10 1st winter birds.

 
A

Dark individual with plain gray replaced spapulars.


B

Dark individual somewhat resembling smithsonianus.






C






D 




 
E



 
F




G





  
H

Relatively large individual (male?).




I 


Quite small individual (female?). Looks very fresh,  and close to juvenile plumage. Only a few replaced scapulars are visible.




 
J


The smallest individual in center is above-mentioned "I". "J" is standing behind. The large individual in the foreground is Slaty-backed Gull. Thayer's Gulls usually can be picked out by their  "uniform and smallish" looks among Vega and Slaty-backed Gulls.