1st winter/summer Mongolian Gull L. c? mongolicus
Mach 11th 2002 Choshi Chiba Japan


Note the second generation scapulars showing white ground colors and contrasty dark anchors. The underparts are mostly white, and the flank shows some barred feathers. Typically, Vega Gulls show uniform brownish underparts. Click here to see Vega Gulls on the same date and March 13th.
After this, it suddenly flew away showing its narrow tail-band.

 
 
 
 
 Mongolian Gull? 
Its extremely white appearance stands out among a Vega-flock. But the scapulars seem to be not typical for Mongolian Gull. In March, part of Vega Gulls also might be faded and acquire pretty whitish appearance, so identifications are often difficult, though we can also say that being advanced earlier is one of the characteristics of Mongolian Gull. Click here to see Vega Gulls on the same date and March 13th.
The width of the tail-band seems to overlap with both Mongolian and Vega Gull. But the combination between the tail-band and white rump appears like Mongolian rather than Vega Gull.