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The European herring gull (Larus argentatus) is a large gull, up to 66 cm (26 in) long. [2] It breeds throughout the northern and western coasts of Europe. Some European herring gulls, especially those resident in colder areas, migrate further south in winter, but many are permanent residents, such as in Ireland, Britain, Iceland, or on the North Sea shores.
The American herring gull or Smithsonian gull (Larus smithsonianus or Larus argentatus smithsonianus) is a large gull that breeds in North America, where it is treated by the American Ornithological Society as a subspecies of herring gull (L. argentatus). Adults are white with gray back and wings, black wingtips with white spots, and pink legs.
Herring gull is a common name for several birds in the genus Larus, all formerly treated as a single species. Three species are still combined in some taxonomies: American herring gull (Larus smithsonianus) - North America; European herring gull (Larus argentatus) - Northern Europe; Vega gull (Larus vegae) - East Asia
The site, managed by the trust and owned by Affinity Water, was "a vital roost site for five species of gulls" - including the great black-backed gull, lesser black-backed gull, herring gull ...
Large white-headed gull is used to describe the 18 or so herring gull-like species, from California gull to lesser black-backed gull in the taxonomic list below. White-winged gull is used to describe the four pale-winged, high Arctic-breeding taxa within the former group; these are Iceland gull , glaucous gull , Thayer's gull , and Kumlien's gull .
In western gulls (Larus occidentalis), female-female pairs are often associated with supernormal clutches (clutches of 4–6 eggs; a normal clutch for Larus gull species is 2–3 eggs) and these clutches are usually infertile. [27] Female-female pairs have also been widely reported in wild populations of ring-billed gulls (Larus delawarensis).
The last is the eastern representative of the lesser black-backed gulls back in northwestern Europe, including Great Britain. However, the lesser black-backed gulls and herring gull are sufficiently different that they rarely interbreed; thus, the group of gulls forms a continuum except in Europe, where the two lineages meet.
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