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Common gull
:''For the common gull butterfly, see'' Cepora nerissa.
The common gull (European and Asian subspecies; see below) or mew gull (North American subspecies) ''Larus canus'' is a medium-sized gull which breeds in northern Asia, northern Europe and northwestern North America. It migrates further south in winter.〔del Hoyo, J., et al., eds. (1998). ''Handbook of the Birds of the World'' 3: 621. Lynx Edicions ISBN 84-87334-20-2.〕 Its name does not indicate that it is an abundant species, but that during the winter it feeds on common land, short pasture used for grazing.〔Okill, Dave (2004) English names for Western Palearctic birds ''British Birds'' 97(7): 348-9〕
==Description==
Adult common gulls are 40–46 cm long, noticeably smaller than the herring gull, and slightly smaller than the ring-billed gull, also differing from the latter in its shorter, more tapered bill with a more greenish shade of yellow, as well as being unmarked during the breeding season. The body is grey above and white below. The legs are greenish-yellow. In winter, the head is streaked grey, and the bill often has a poorly defined blackish band near the tip (sometimes sufficiently obvious to cause confusion with ring-billed gull). They have black wingtips with large white "mirrors". Young birds have scaly black-brown upperparts and a neat wing pattern, and grey legs. They take two to three years to reach maturity. The call is a high-pitched "laughing" cry.〔〔Snow, D. W. & Perrins, C. M. (1998). ''The Birds of the Western Palearctic'' Concise Edition. OUP ISBN 0-19-854099-X.〕
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