Greater coucal

Greater coucal
Centropus sinensis in Mangaon, Raigad, Maharashtra
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Cuculiformes
Family: Cuculidae
Genus: Centropus
Species: C. sinensis
Binomial name
Centropus sinensis
(Stephens, 1815)[2]

The greater coucal or crow pheasant (Centropus sinensis), is a large non-parasitic member of the cuckoo order of birds, the Cuculiformes. A widespread resident in Asia, from India, east to south China, Nepal and Indonesia, it is divided into several subspecies, some being treated as full species. They are large, crow-like with a long tail and coppery brown wings and found in wide range of habitats from jungle to cultivation and urban gardens. They are weak fliers, and are often seen clambering about in vegetation or walking on the ground as they forage for insects, eggs and nestlings of other birds. They have a familiar deep resonant call which is associated with omens in many parts of its range.

Description

Nominate race in Kolkata

This is a large species of cuckoo at 48 cm. The head is black, upper mantle and underside are black glossed with purple. The back and wings are chestnut brown. There are no pale shaft streaks on the coverts. The eyes are ruby red. Juveniles are duller black with spots on the crown and there are whitish bars on the underside and tail. There are several geographic races and some of these populations are sometimes treated as full species. Earlier treatments included the brown coucal (C. (s.) andamanensis) under this name. Rasmussen & Anderton (2005) suggest that the race parroti may be a full species – the southern coucal which is found in peninsular India (northern boundary unclear). The race intermedius of the Assam and Bangladesh region is smaller than the nominate race found in the sub-Himalayan zone. Songs of the races are said to vary considerably. Race parroti of southern India has a black head and the underparts glossed blue and has the forehead, face and throat more brownish.[3] The sexes are similar in plumage but females are slightly larger.[4]

Leucicistic specimens have been observed.[5]

Subspecies and distribution

The long and straight hind claw is characteristic of the genus

The nominate race is found from the Indus Valley through the sub-Himalayan and Gangetic plains to Nepal, Assam and the Bhutan foothills into southern China (Guangxi, Zhejiang, Fujian).[6]

Immature of nominate race showing barred/speckled underside. Haryana, India

The young when hatched have black skin and white hairy feathers (termed as trichoptiles) forming a fringe over the eye and beak.[7][8] The centre of the belly is pinkish and the upper mandible is black with a pink edge. The iris is brown, gape yellow and feet dark brown-gray.[6]

Greater coucal in Perundurai

The juvenile of race parroti is unmarked dull black on the underside (contra barred in the northern races) and much darker, dusky chestnut on the wings. Race bubutus found in Southeast Asia has a distinct call. Individuals from the Western Ghats are very similar in size to the lesser coucal Centropus bengalensis but the latter has a stubbier bill, shorter tail, wing tips extending beyond the tertials and a chestnut wing lining, dark eyes and a tail with green/bronze sheen.[3] Females of the race parroti develop dusky or sooty wing coverts between November and January and the northern boundary of the race is along the Punjab plains where it forms intermediates with the northern forms.[9]

Behaviour and ecology

Picking up a snail shell in Kolkata, West Bengal, India.

The greater coucal is a large bird which takes a wide range of insects, caterpillars and small vertebrates such as the Saw-scaled vipers.[10] They are also known to eat bird eggs, nestlings, fruits and seeds. In Tamil Nadu they were found to feed predominantly on snails Helix vittata. They are also known to feed on the toxic fruits of Cascabela thevetia (Yellow Oleander).[6][11] In Oil palm cultivation, they have been noted as an avian pest due to their habit of eating the fleshy mesocarps of the ripe fruits.[12]

Sunning (West Bengal, India)

They sunbathe in the mornings singly or in pairs on the top of vegetation with their wings spread out. The territory of a nesting pair has been found in southern India to be 0.9 to 7.2 ha (mean 3.8 ha).[13] They are most active in the warm hours of the morning and in the late afternoon.[14]

The calls are a booming low coop-coop-coops repeated and with variations and some duets between individuals.[3] When duetting the female has a lower pitched call. Other calls include a rapid rattling "lotok, lotok ..." and a harsh scolding "skeeaaaw" and a hissing threat call.[4]

Breeding

Nest in a Whistling Pine.

The breeding season is after the monsoon in southern India but varies in other parts of its range but chiefly June to September.[13] Greater coucals are monogamous, and the courtship display involves chases on the ground and the male brings food gifts for the female. The female lowers her tail and droops her wings to signal acceptance. The nest is built mostly by the male over about three to eight days.[13][15] The nest is a deep cup with a dome in dense vegetation inside tangles of creepers, bamboo clump or Pandanus crowns. They can be built as high as 6m above the ground and the typical clutch is 3–5 eggs. The eggs (of size 36–28 mm weighing 14.8 g ) are chalky white with a yellow glaze when laid that wears off.[16] Both the male and the female take part in nest building. They lay 2 to 4 eggs that hatch after 15–16 days of incubation. The chicks take 18–22 days to fledge. A study in southern India found that 77% of the eggs hatched and 67% fledged. Nests with eggs were sometimes abandoned or marauded by the jungle crow Corvus macrorhynchos.[13]

Haemosporidia closely related to those that cause malaria have been found in their red blood cells. One species, Haemoproteus centropi, is described from cuckoos such as Clamator jacobinus and Centropus sinensis and is spread by mosquitoes.[17] Immature Haemaphysalis ticks have been found feeding on greater coucals.[18]

In culture

The bird is associated with many superstitions and beliefs. The deep calls are associated with spirits and omens.[19][20]

In British India, it was noted that new-recruits to India often mistook it for a pheasant and shot it to find it "evil flavoured" giving it the nickname of "Griff's pheasant".[21]

The flesh was once eaten as a folk cure for tuberculosis and pulmonary ailments.[22]

The Greater coucal is the national bird of the proposed state of Tamil Eelam. The bird is known in tamil as Sempotthu, Sempakam and Sengkagam.

References

  1. ↑ BirdLife International (2012). "Centropus sinensis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  2. ↑ In Shaw's General Zoology 9, pt. 1, p. 51. (Type locality China, Ning Po.) per Payne (2005)
  3. 1 2 3 Rasmussen, PC; JC Anderton (2005). Birds of South Asia: The Ripley Guide. Volume 2. Smithsonian Institution & Lynx Edicions.
  4. 1 2 Ali, S; SD Ripley (1981). Handbook of the birds of India and Pakistan. Volume 3 (2nd ed.). Oxford University Press. pp. 240–244.
  5. ↑ Ghosal,DK; Ghose,RK (1990). "Partial albinism in a specimen of the Crow-Pheasant Centropus sinensis sinensis (Stephens)". Records Zool. Survey India. 87: 337.
  6. 1 2 3 4 5 6 7 8 Payne, RB (2005). The Cuckoos. Oxford University Press. pp. 238–242. ISBN 0-19-850213-3.
  7. ↑ Shelford R (1900). "On the pterylosis of the embryos and nestlings of Centropus sinensis". Ibis. 42 (4): 654–667. doi:10.1111/j.1474-919X.1900.tb00763.x.
  8. ↑ Hindwood, KA (1942). "Nestling Coucal" (PDF). The Emu. 42 (1): 52. doi:10.1071/MU942050c.
  9. ↑ Abdulali, Humayun (1956). "Some notes on the plumages of Centropus sinensis (Stephens)". J. Bombay Nat. Hist. Soc. 54 (1): 183–185.
  10. ↑ Venugopal,B (1981) Observations on the Southern Coucal Centropus sinensis feeding on the Saw-scaled Viper Echis carinatus. Newsletter for Birdwatchers . 21(12):19.
  11. ↑ Natarajan,V (1993). "Food and feeding habits of the Southern Crow-Pheasant Centropus sinensis parroti Stresemann (Aves : Cuculidae) at Pt. Calimere, Tamil Nadu". J. Bombay Nat. Hist. Soc. 90 (1): 11–16.
  12. ↑ Dhileepan K (1989). "Investigations on avian pests of oil palm, Elaeis guineensis Jacq. in India". Tropical pest management. 35 (3): 273–277. doi:10.1080/09670878909371379.
  13. 1 2 3 4 Natarajan, V. (1997). "Breeding biology of the Southern Crow-Pheasant Centropus sinensis parroti Stresemann (Aves: Cuculidae) at Point Calimere, Tamil Nadu.". J. of the Bombay Natural History Society. 94 (1): 56–64.
  14. ↑ Natarajan,V (1993) Time budgeting by the Southern Crow-Pheasant Centropus sinensis parroti Stresemann (Aves : Cuculidae) at Pt. Calimere, Tamil Nadu. J. Bombay Nat. Hist. Soc. 90(1):92–95
  15. ↑ Dhindsa, Manjit Singh; Toor, HS (1981). "Some observations on the nest of the Common Crow-Pheasant, Centropus sinensis (Stephens)". J. Bombay Nat. Hist. Soc. 78 (3): 600–602.
  16. ↑ Baker, ECS (1934). "The nidification of birds of the Indian Empire. Volume 3". Taylor and Francis, London.
  17. ↑ Peirce MA (1977). "Haematozoa of East African birds: II. Redescription of Haemoproteus centropi, a parasite of the Cuculidae". African Journal of Ecology. 15 (1): 57–60. doi:10.1111/j.1365-2028.1977.tb00378.x.
  18. ↑ Harry Hoogstraal; Vijai Dhanda; H. R. Bhat (1972). "Haemaphysalis (Kaiseriana) anomala Warburton (Ixodoidea: Ixodidae) from India: Description of Immature Stages and Biological Observations". The Journal of Parasitology. The American Society of Parasitologists. 58 (3): 605–610. doi:10.2307/3278216. JSTOR 3278216. PMID 5042066.
  19. ↑ Yule, Henry (1903). Hobson-Jobson: A glossary of colloquial Anglo-Indian words and phrases, and of kindred terms; etymological, historical; geographical; discursive. New; William Crooke, eds. London: J. Murray. p. 277 http://dsal.uchicago.edu/cgi-bin/philologic/getobject.pl?c.0:1:683.hobson. Missing or empty |title= (help)
  20. ↑ Thurston, Edgar (1906). Ethnographic notes in Southern India. Government Press, Madras. p. 283.
  21. ↑ Dewar, Douglas (1912). Jungle folk, Indian natural history sketches. John Lane, London.
  22. ↑ Inglis, CM (1898). "Birds collected during five years' residence in the Hylakandy District, Cachar. Part V". J. Bombay Nat. Hist. Soc. 11 (3): 474–481.

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