On Sunday, 19 November 2017, I found an adult California Gull in Lake County, Illinois. This small individual tried to blend in with the Ring-billeds but I wouldn't have it:
Now about that Glaucous Gull, this was a gentle bruiser that hung around me for a couple of hours:
The bill on this bird is relatively thin. The eye is as beady as it gets.
There's been a relatively good showing of 1st and 2nd cycle Thayer's in November. I'm up to 6 first cycles and 3 second cycles, out of a total of 23 thayeri thus far this season.
Here's a neat adult type Iceland Gull that reinforces the notion that many western Great Lakes birds don't nicely fit in any particular box. The primaries are darkish gray - no where close to black - but p5 shows a subterminal band. The bill is long and pointed like many thayeri, as is the smudgy head.
|Adult Iceland Gull shown with a Ring-billed Gull.|
Another interesting adult that I would've surely called a Thayer's had I not examined the face/bill:
A white-winged Herring Gull with very little black on p6. This wingtip
pattern is rare for any American Herring Gull.