Thayer's Gull (thayeri)

(last update: January 22, 2013)

Amar Ayyash (USA)
Mars Muusse (Netherlands)

Thayer's Gull adult, January 13 2013, Lake County, IL. Picture: Amar Ayyash.

Visit: Amar's blog for many more images!

Left wing with thayeri pattern on P9 and no sub-terminal black on P5. Thin line on P5 in right wing.