Great stone-curlew

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Great stone-curlew
Great Thick-knee (23349495660), crop.jpg
At Chambal River, Uttar Pradesh, India
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Burhinidae
Genus: Esacus
Species:
E. recurvirostris
Binomial name
Esacus recurvirostris
(Cuvier, 1829)
Esacus recurvirostris and Esacus magnirostris ranges.png
  E. recurvirostris range
   E. magnirostris range

The great stone-curlew or great thick-knee (Esacus recurvirostris) is a large wader which is a resident breeder in tropical southern Asia from India, Pakistan, Sri Lanka, Bangladesh into South-east Asia.

Contents

Taxonomy

The great stone-curlew was formally described in 1829 by the French naturalist Georges Cuvier and given the binomial name Oedicnemus recurvirostris. [2] The type locality is Nepal. [3] The specific epithet recurvirostris combines Latin recurvis meaning "bent backwards" with -rostris meaning "-billed". [4] The species is now placed in the genus Esacus that was introduced in 1831 to accommodate the great stone-curlew by the French naturalist René Lesson. [5] [6] The species is monotypic: no subspecies are recognised. [6]

Description

The great thick-knee is a large wader at 4955 cm, and has a massive 7 cm bill with the lower mandible with a sharp angle giving it an upturned appearance. It has unstreaked grey-brown upperparts and breast, with rest of the underparts whitish. The face has a striking black and white pattern, and the bill is black with a yellow base. The eyes are bright yellow and the legs a duller greenish-yellow. In flight, the great thick-knee shows black and white flight feathers on the upperwing, and a mainly white underwing. Sexes are similar, but young birds are slightly paler than adults.

Behaviour

This species prefers gravel banks along rivers or large lakes, and also beaches. It is mainly nocturnal or crepuscular like other stone-curlews, but can frequently be seen foraging during the day, moving slowly and deliberately, with occasional short runs. It tends to be wary and flies off into the distance ahead of the observer, employing powerful, rather stiff wingbeats. The call is a wailing whistle, given mainly at night, as with other birds in this family. The great thick-knee eats crabs, large insects, and other animal prey. A single egg is laid in a bare scrape on the open shingle.

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References

  1. BirdLife International (2017). "Esacus recurvirostris". IUCN Red List of Threatened Species . 2017: e.T22693604A118013237. doi: 10.2305/IUCN.UK.2017-3.RLTS.T22693604A118013237.en . Retrieved 12 November 2021.
  2. Cuvier, Georges (1829). Le règne animal distribué d'après son organisation, pour servir de base à l'histoire naturelle des animaux et d'introduction à l'anatomie comparée (in French). Vol. 1 (Nouvelle édition, Revue et Augmentée ed.). Paris: Déterville. p. 500, Note 2.
  3. Peters, James Lee, ed. (1934). Check-List of Birds of the World. Vol. 2. Cambridge, Massachusetts: Harvard University Press. p. 297.
  4. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 331. ISBN   978-1-4081-2501-4.
  5. Lesson, René (1831). Traité d'Ornithologie, ou Tableau Méthodique (in French). Vol. Livraison 7. Paris: F.G. Levrault. p. 547. Published in 8 livraisons between 1830 and 1831. For dates see: Dickinson, E.C.; Overstreet, L.K.; Dowsett, R.J.; Bruce, M.D. (2011). Priority! The Dating of Scientific Names in Ornithology: a Directory to the literature and its reviewers. Northampton, UK: Aves Press. p. 119. ISBN   978-0-9568611-1-5.
  6. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2021). "Buttonquail, thick-knees, sheathbills, plovers, oystercatchers, stilts, painted-snipes, jacanas, Plains-wanderer, seedsnipes". IOC World Bird List Version 11.1. International Ornithologists' Union. Retrieved 1 June 2021.