This first-cycle possible Vega Gull (Larus [argentatus] vegae) was photographed on the Texas Coastal Plain near Galveston, Texas on February March 30, 2008.
UPDATE Feb 13, 2020: Here is a link to a very similar bird from Japan in early April.
UPDATE Feb 13, 2020: Here is another link to a different but similar bird from Japan in early April.
UPDATE Feb 13, 2020: Here is yet another link to another different but similar bird from Japan in early April.
For comparison here is a similar bird from Texas in Feb 2015:
NOTE in the image below that the double white bar on the greater secondary coverts extends to the outermost feathers of this tract:
NOTE in the image below the whitish crescent across the uppertail coverts:
