Thayer's Gull adult, January 12 2009, Moss Landing, CA. Picture: Jeff Poklen.
Many more pictures, visit: Jeff's Pbase site.
Bird in background: Iris scoring is 1.0, pale brown or honey-coloured which is found in 23% of Thayer's Gull (see HERE).
Bird in foreground:
Iris scoring is 1.5, dusky, greenish, dark yellow, or amber, extensively mottled brown which is found in 26% of Thayer's Gull (see HERE).