Slaty-backed Gull

The slaty-backed gull (Larus schistisagus) is a large, white-headed gull that breeds on the north-eastern coast of the Palearctic, but travels widely during nonbreeding seasons. It is similar in appearance to the western gull and the glaucous-winged gull. Another alternate name is Pacific gull, though it also applies to a Southern Hemisphere species, L. pacificus. == Etymology == The genus name is from Latin larus, which appears to have referred to a gull or other large seabird. The specific schistisagus is from Neo-Latin schistus, "slate", and Latin sagus, "cloak". == Distribution and habitat == The Slaty-backed Gull is native to the Pacific coast of northeastern Asia. Individuals have strayed to various places throughout North America, including Alaska, New England and Texas. On 3 November 2012, an individual was spotted in Finland. The species has only been spotted three times before in Europe. == Description == It is tied with the yellow-footed gull for fourth-largest gull species, measuring 55–68.5 cm (21.7–27.0 in) in length, 132–160 cm (52–63 in) in wingspan, and 1.05–1.7 kg (2.3–3.7 lb) in weight. Among standard measurements, the wing chord is 40 to 48 cm (16 to 19 in), the bill is 4.8 to 6.5 cm (1.9 to…