|Adult Kumlien's. Lake County, IL. 08 December 2012.|
|Note the large, all white, tip to P10 and unmarked P6. This individual exhibits a pattern similar to PLATE I in Howell and Dunn, but the shade of darkness is much more extensive.|
We found 2-3 Kumlien's types and 2-3 Thayer's - no Glaucous or LBBGs, which was somewhat of a surprise.
|2nd cycle Thayer's Gull. Lake County, IL. 08 December 2012.|
|The adult-like bill pattern is just another example of the infinite variation found at the species level with Herring!|