Lesser Black-backed and Iceland gulls on the Kaw River, Lawrence, Douglas County, Kansas|
Photographed 6 January 2008
Canon EOS 1D Mark IIN / EF 500mm f4L IS + 1.4x and/or 2.0x teleconverter
All photos © 2008 David Seibel
Note the slender body, relatively small rounded head, blackish tertials, and barred vent and undertail coverts.
Below, the dark wings are visible with varying degrees of backlighting. The inner primaries lack the obvious "window" found in Herring Gulls. Also note the dark brown wing linings and the dark greater coverts. In the second image below, the wide dark tailband and pale (but barred) uppertail coverts are also displayed, as well as the pink legs and feet.
Note the broad wings and very faint markings on the wing and tail feathers.