233. Larus affinis.
THE DARK-BACKED HERRING-GULL.
Male 24" to 24 1/2"; 2 to 2 3/4 lbs. Female 22" to 23 1/2"; 2 lbs. Legs pale yellow. Bill yellow, patch red. Mantle and both webs of primaries at base slate-grey. First quill with grey wedge on inner web, then a broad white band, and then a sub-terminal black bar and white tip. On second quill grey wedge is larger, rest black and tip white. In other quills there is more grey on both webs, till the black finally disappears.— In winter: Head and neck flecked with brown. Breeds in N. E. Europe and Siberia, visiting in winter E. Africa, S. Arabia, Baluchistan, and W. India. (B. 1494. S. F. i. 273.)