Common Gull

The adult common gull is 40–46 centimetres long with a wingspan of 100–115 centimetres, noticeably smaller than the herring gull and slightly smaller than the ring-billed gull. It differs from the ring-billed gull in its shorter, more tapered bill, a more greenish shade of yellow and unmarked in the breeding season. The body is grey above and white below, and the legs are yellow in the breeding season, becoming duller in winter. In winter the head is streaked grey and the bill often has a poorly defined blackish band near the tip. (Wikipedia, general species account)

A medium-sized gull, it breeds in cool temperate regions of the Palearctic from Iceland and Scotland east to Kamchatka. Most common gulls migrate further south in winter, reaching the Mediterranean, the southern Caspian Sea and the seas around China and Japan, while northwest European populations are at least partly resident. There are three subspecies, with the Kamchatka gull considered by some authorities a potentially separate species; the North American short-billed gull is now generally treated as a distinct species. (Wikipedia, general species account)