Slender billed gull (Larus genei)

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[edit] Slender billed gull (Larus genei) Breme, 1839

[edit] Taxonomy

Slender billed gull is mid size gull of family Laridae belonging to genus Larus.

Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Larus
Species: Larus genei, Breme, 1839

[edit] Distribution

Slender billed gull breeds in Central Asia, and mixes with birds of the south in the Persian Gulf and along the Arab coasts. The birds of the Black Sea spend the winter to the Mediterranean, much to Egypt and Tunisia. It is a visitor of regular winter at sea Rouge. The populations of West Africa, Spain, Persian Gulf and Pakistan are not very migrating, but disperse in the close zones.

[edit] Physical Characteristics

Slender billed gull are 37-40 cm long with a 90-102 cm wingspan. The adults are distinguished from other seagulls thanks to a white spot with the back of the wings, with the long nozzle, thick and red dark and with the color slightly orange of the chest and belly. The head and dark red bill have an elongated tapering appearance, and this bird also appears long-necked. The legs are dark red, and the iris is yellow. In summer, the breast has a pink coloration. First year birds have a black terminal tail band, and dark areas in the wings. The neck too is unusually long and rather even in width so that birds at rest can look ‘giraffe-necked’ and, in flight, almost ‘torpedo-headed’. Other distinctive features include the strikingly pale bills of immature birds and the pale eyes which, because of the long forehead, can appear to be miles from the bill.

[edit] Habitat

Slender billed gull likes the estuaries and the coasts in winter, the lagoons and the lakes in summer. One also finds it in the grassy reeds, zones, the salt-water marshes or of fresh water, or the large deltas.

[edit] Diet

Slender billed gull feeds mainly on aquatic and terrestrial insects, marine invertebrates and fish. The fish accounts for 50% of the mode of Slender billed gull. The vegetable matters also form part of its consumption.

[edit] Behavior

Slender billed gull engages of the air dives towards the surface of water, dropping itself from a one meter height and setting out again at once in the airs. It excavates also mud with the nozzle. The insects are caught in flight. It likes the refuse tips, they join other seagulls in the mouths of the rivers.

[edit] Breeding

Slender billed gull reproduces on small islands, in the lagoons or the saltworks. The nest is a depression obtained by scraping the ground, and furnished with feathers and pieces of vegetation. The laying takes place in May/June. The female deposits 2 to 3 eggs (56mm) bluish mottled the brown dark one. Incubation lasts from 24 to 25 days. The chicks fly away at the end of approximately 25 days.

[edit] References

  • The gulls (Laridae) of the world : their plumages, moults, variations, relationships and distribution. Bulletin of the AMNH ; v. 52, article 3.
  • The Clements Checklist of Birds of the World: James F. Clements, Jared Diamond, John W. Fitzpatrick.
  • Wetlands International Waterbird Population Estimates - Fourth Edition.
  • Ali, S. & Ripley, D. (1964-74 ) Handbook of the Birds of India & Pakistan (Vols. 1-10). Bombay: OUP
  • Grimmet, R Inskipp, T., & Inskipp, C. (1998) Birds of the Indian Subcontinent. UK: A&C Black.
  • Inskipp, T. et al. (1996) An Annotated Checklist of the Birds of the Oriental Region. Sandy, UK: OBC.
  • Kazmierczak, K. & van Perlo, B. (2000) A Field-Guide to the Birds of the Indian Subcontinent. UK: Pica Press
  • BirdLife International (2004
  • IUCN Red List of Threatened Species. IUCN 2006
  • Harrison, Peter (1988): Seabirds (2nd edition). Christopher Helm, London
  • Peterson, R.T., Mountfort, G. & Hollom, P.A.D. (1993) Collins Field Guide- Birds of Britain and Europe.

Arpit Deomurari
Consultant (Environment, GIS and IT)
[email protected]