Hi all. Does anyone want to take a wack at this. I photographed this one last Friday around lunch time flying over head at the North East Town Park.
http://www.smbirdphotos.com/index.cgi?do=view_photos&subcatID=186
This bird gave me the impression that it was a white-winged Gull because it was so light, however as you can see, if it is an Iceland Gull, it is the most detailed and marked up Iceland Gull I have ever seen.  It had a solid black bill and seemed like it was aprox the size of an Iceland, but that is hard to accurately tell due to the bird was in flight and I am looking at it thru a camera view finder.
I added a typical 1st cycle Iceland Gull over head photo for comparison, photographed the same day.
 
There was a huge flight that day. I had at least 2000-2500 birds between 10:30 and 12:00.
3 Iceland Gulls, and 3 Lesser Black-backed Gulls included.

Sean McCandless
Cecil  Bird Club Field Trip Coordinator
Elkton, MD