Here's an interesting juvenile American Herring Gull with what looks like a series of pearls all across the subterminal tips to the primaries and greater primary coverts:
|Juvenile American Herring Gull. Chicago, IL. 15 August 2012.|
Juvenile American Herring Gulls have been out and about for a couple of weeks now on the Chicago lakefront. This species is our only other summering gull, found in much smaller numbers than Ring-billeds.