White-eyed Gull (L. leucophthalmus) & Sooty Gull (L. hemprichii)
Sooty Gull L. hemprichii near-adult, March 04 2002, visitor's centre of Nabq National Park, SE Sinai, Egypt.
As is the case with White-eyed Gulls, some
near-adult Sooty Gulls may be difficult to age, more over since 3rd winter Sooty Gulls resemble 2nd winters, where 3rd winter
White-eyed Gulls resemble adults. The second generation tail-feathers show various amount
of black in second winter, normally creating a broken tail-band of sub-terminal
markings, but as can be seen in the picture, black is limited to only a very
small black mark near the shaft of the outer rectrices. The black primaries show white
tips up to p8. Second winter Sooty Gull show white tips already, like many medium-sized
gulls do, e.g. Common Gull (L.
Sooty Gull has rounded and broader wings compared to White-eyed Gull, and a more swinging flight-impression, unlike the stiff flight of White-eyed Gull. In flight the stronger neck and breast are obvious, creating a profile more in line with white-headed gulls from the Western Palearctic. Note the obvious white trailing edge in Sooty, which is much thinner in White-eyed Gull.