[Probable] Adult Herring X Great Black-backed Gull (Larus argentatus X marinus) - 8 photos

 
1

Note intermediate mantle color and size (sleeping bird).  Wayne Co., Michigan.  16 December 2004.  Digiscoped.

2

Note intermediate mantle color.  Wayne Co., Michigan.  16 December 2004.  Digiscoped.

3

Note pink legs and short primary projection.  Wayne Co., Michigan.  16 December 2004.  Digiscoped.

4

Note large head, smallish bill, relatively unmarked white head, and short primary projection.  
Wayne Co., Michigan.  16 December 2004.  Digiscoped.

5

Slightly larger than Herring Gulls.  Wayne Co., Michigan.  16 December 2004.  Digiscoped.

6

Yellow iris, bright orange-yellow bill, small tertial crescent, large mirror on p10.  
Wayne Co., Michigan.  16 December 2004.  Digiscoped.

7

Legs clearly pink.  Wayne Co., Michigan.  16 December 2004.  Digiscoped.

8

Note intermediate mantle color even in bright light.  Wayne Co., Michigan.  16 December 2004.  Digiscoped.