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Little Gull

From Opus

Photo by postcardcvBreeding PlumageSalthouse, Norfolk, April, 2008
Photo by postcardcv
Breeding Plumage
Salthouse, Norfolk, April, 2008
Hydrocoloeus minutus

Larus minutus

Contents

[edit] Identification

Length 25-30 cm, wingspan 70-78 cm, weight 90-160 g.
The smallest gull. Adult in summer plumage shows short, thin, black or very dark red bill, short, rounded wings, black head extending onto upper neck, white nape, neck, breast, belly, and tail, pale grey back and upperwings, dark grey underwings, red legs. Adult in winter is similar to summer but with black hood strongly reduced.

Juvenile has wings more pointed than adult, there is a dark "M" on the upper surface consisting of middle coverts and outermost primaries, and the underside of the wing is white. There is a dark band at the tip of the tail. It takes about three years to reach full adult plumage, with gradual changes lightening the upperside of the wings and darkening the flight feathers before darkening the coverts on the underside of the wings.

[edit] Similar Species

Photo by Marc GuytPhoto taken: Katwijk, the Netherlands
Photo by Marc Guyt
Photo taken: Katwijk, the Netherlands

Ross's Gull is slightly larger with usually at least part of the dark collar, grey wingtips and lighter grey underwing (adult), shorter stubby bill, and longer primary projection.
Bonaparte's Gull is larger with longer bill, much longer primary projection, and dark wingtips with a white forewing 'blaze'.
Black-headed Gull is much larger with a less extensive brownish hood, dark wing tips with a white forewing 'blaze', and larger red bill (in all plumages except juvenile which has paler bill).

[edit] Distribution

Breeds central and southern Finland and the Swedish islands of Oland and Gotland, the Baltic States, Belarus, northern Ukraine and across Russia to around Novosibirsk, with a disjunct population in eastern Russia and northeasternmost China from Lake Baikal east to the upper Amur River basin. Also breeds in very small numbers or sporadically elsewhere in north and east Europe including Norway, the Netherlands, Denmark and Poland, and very locally, a recent colonist around the Great Lakes area in Canada.

Isolated breeding pairs or attempted breeding has also been recorded in Britain and France, Germany, the Czech Republic, Austria and Romania.

Migratory, juveniles leave breeding grounds July-September followed by adults in October-November.

Winters in the Gulfs of Bothnia and Finland and the Baltic, the coasts of east and southern British Isles (scarce) and from Denmark to Spain. In the Mediterranean occurs in the north from Gibraltar to the Middle East and off northwest Africa and also winters in the Black Sea and Sea of Azov. The eastern Russian breeders migrate to the Yellow Sea in winter. Small numbers also winter off the east coast of Canada and northeast USA. Spring return movement in March-May. Passage is both coastal and inland, and migrants can be seen across much of Britain and mainland Europe. First-summer birds often spend the summer in the wintering range, or a short distance outside of the breeding range; birds in this age group are much commoner visitors to Britain in summer than adults.

Vagrant north to Iceland, Faroes and Norway, and south to Kenya, the Middle East and Kuwait, and the Canary Islands and Madeira.

[edit] Taxonomy

Photo of first winter bird by RJL2005Photo taken: Ogmore, S. Wales.
Photo of first winter bird by RJL2005
Photo taken: Ogmore, S. Wales.

This is a monotypic species[1].

It was formerly often placed in the genus Larus. Genetically it is however most closely related to Ross's Gull Rhodostethia rosea; this is included in Hydrocoloeus by some authors, and also shares several aspects of plumage, particularly of immatures.

[edit] Habitat

Lowland freshwaters, river deltas and valleys, swamps, marshes and beside lakes.

[edit] Behaviour

Somewhat similar to a Black Tern in summer both in choice of overgrown marshes for breeding and in often plucking food off the surface of water through repeated dives.

[edit] Vocalisation


Listen in an external program

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2013. The eBird/Clements checklist of birds of the world: Version 6.8., with updates to August 2013. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/

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