White-eyed Gull (L. leucophthalmus) & Sooty Gull (L. hemprichii)
Sooty Gull L. hemprichii adult, March 04 2002, visitor's centre of Nabq National Park, SE Sinai, Egypt.
Sooty Gull has a thicker and straighter bill than
White-eyed Gull, with a pronounced
gonydeal angle. In all plumages the bill is clearly two-toned with a paler
basal half and a dark tip. The basal half is yellowish-grey in immatures
and yellow in adults. At close distance, the black tip of the bill in
adult plumage appears to be a black bill-band with a small red tip. The
is less-defined in Sooty, yet obvious above the eye, white in adults and off-white in first winter
plumage, but never as conspicuous as in White-eyed Gull. Normally the
lower crescent is missing, where White-eyed Gull shows a clear crescent
both above and below the eye.