Malabar whistling thrush explained

The Malabar whistling thrush (Myophonus horsfieldii) is a whistling thrush in the family Muscicapidae. The bird has been called whistling schoolboy for the whistling calls that they make at dawn that have a very human quality. The species is a resident in the Western Ghats and associated hills of peninsular India including central India and parts of the Eastern Ghats.

Taxonomy and systematics

This is a monotypic taxon previously considered conspecific with Taiwan whistling thrush.

Description and biology

It is a large thrush measuring about 25-30 cm and weighs about 101-130 g. The male has a blackish upper body with shiny metallic patches of blue on the forehead and shoulders, and glossy royal-blue scaling on back, scapulars and mid-breast to belly. The bill and legs are black. The female is very similar, but with weaker scaling below. Juveniles are black, with glossy blue shoulder patch and wing edgings. The blue becomes visible only in oblique lighting and is due to ultraviolet reflectance, a shared attribute with other whistling thrushes.[1] [2] [3]

Distribution and habitat

Malabar whistling thrushes are usually found in dark undergrowth in dense riverine forest. They typically forage in the margins, beds and adjacent ground of rocky hill streams and rivers in forest, secondary growth and plantations from foothills up to 2200 m above sea level but reach the plains in the rainy season. The species is found all along the Western Ghats south of the Surat Dangs. They are also found along the Satpura range to Chhattisgarh,[4] northwestern Orissa (Surguja and Simlipal National Park),[5] [6] and locally in the Eastern Ghats.[7] Populations are not migratory but are known to disperse widely in winter.[8] An individual that was ringed in Mahabaleshwar in the summer of 1972 was recovered in the winter of 1976 in Sampaje, Coorg.[9] Although historically recorded twice from Mount Abu,[10] [11] more recent surveys have not recorded the bird or suitable habitat in that location.[12]

Behaviour and ecology

They are usually seen singly or in pairs. Wherever there is suitable habitat, they are often found close to human habitation. The male sings its varied and melodious whistling song from trees during summer. They may sing for a long time around dawn but at other times of the day they often utter sharp single or two note high-pitched whistles. They were once popular as cage birds, with the ability to learn entire tunes. They bathe frequently in water usually in the mornings and evenings but also at midday during hot weather.

Food and feeding

The species is omnivorous, feeding primarily on insects, snails, worms, crabs[13] and small frogs, as well as drupes, and wind-fallen figs and berries. Occasionally they have been recorded eating small snakes[14] and rare records of eating longer snakes such as the Rat snake have been reported.[15]

Breeding

The birds breed from March to December and begin with the arrival of the monsoons.[16] Courtship involves chasing flights and calling.[17] They usually nest in a cavity on a stream bank but will sometimes make use of nearby buildings.[18] In a study of nest-site selection in the Silent Valley area, a total of 21 nests were found mostly on rocks along the edge of streams and one each in a tree hole and inside an abandoned building. The nest is a cup made of moss, bamboo roots and grass, with a broad base and tapering towards the top. The base of the nest appeared to be cemented to the rock with mud. Mean nest height was 14.8 cm and depth 7.4 cm. The mean outer width and inner width were 21.5 cm and 13.1 cm respectively. Mean height from the ground was 125.8 cm.[19] Most nest sites were about 6 m from water with 60% rock cover. The nests were mostly fully concealed and nesting success was directly related to it. The birds show high site fidelity;[2] occupying and nesting near their previous season's nests.[19] The clutch consists of 2 to 4 eggs.[20] [21] The eggs are pale salmon pink with speckling.[22] The eggs are incubated for about 16 or 17 days by both the male and female.[2]

Other sources

Notes and References

  1. Book: Rasmussen PC . Anderton, JC . amp . 2005. Birds of South Asia: The Ripley Guide. Volume 2. Smithsonian Institution & Lynx Edicions. 371.
  2. Book: Ali, S . Ripley, S D . amp . 1998 . Handbook of the birds of India and Pakistan. 79–81. Oxford University Press. 9 . 2nd.
  3. 1996-07-22. Bright ultraviolet colouration in the Asian whistling-thrushes (Myiophonus spp .). Proceedings of the Royal Society of London. Series B: Biological Sciences. en. 263. 1372. 843–848. 10.1098/rspb.1996.0124. 0962-8452.
  4. Vishwakarma, Anurag, Ravi Naidu2 P. Vijay Sitaram Raju, and Saurabh Singh. "Range extension of Malabar Whistling Thrush (Myophonus horsfieldii) in Chhattisgarh." Newsletter for Birdwatchers 59.6 (2019): 73.
  5. Bharos, A M K . 1996 . Range extension of the Malabar Whistling Thrush, Myiophonus horsfieldii (Vigors). J. Bombay Nat. Hist. Soc. . 93. 2. 295.
  6. Panda, B., S. Pati, and B. P. Dash. "Occurrence of Malabar Whistling Thrush: Myophonus horsfieldii,(Vigors, 1831) in Similipal Biosphere Reserve of Odisha. Bird-o-soar# 05." Zoo’s Print 32.11 (2017): 37.
  7. Ananth, G . 1982. Malabar Whistling Thrush near Madanapalle. . 22. 3&4. 10–11.
  8. Praveen, J.. 2006 . Post-monsoon dispersal of Malabar Whistling Thrush Myiophonus horsfieldii (Vigors) to Chamundi Hill and Nandi Hills, Karnataka, Southern India. Zoos' Print Journal. 21 . 9. 2411 . 10.11609/jott.zpj.1504.2411.
  9. Ambedkar, V C . 1991. Long distance movement of a Malabar Whistling Thrush (Myiophonus horsfieldii) (Vigors) in the Western Ghats. J. Bombay Nat. Hist. Soc.. 88. 1. 113.
  10. Delacour. J. The whistling thrushes (Genus Myiophoneus). Auk. 1942. 246–254. 10.2307/4079555. 59. 2. 4079555.
  11. Butler. EA. Notes on the avifauna of Mount Aboo and northern Guzerat. Stray Feathers. 1875. 3. 3. 437–500.
  12. Sangha. Harkirat Singh. Dhirendra Devarshi. Birds of Mount Abu Wildlife Sanctuary, Rajasthan, India. Indian Birds. March–April 2006. 2. 2. 26–32. 10 February 2011. https://web.archive.org/web/20110720175455/http://www.indianbirds.in/pdfs/Birds%20of%20Mount%20Abu%20Wildlife%20Sanctuary.pdf. 20 July 2011. dead.
  13. McCann, Charles . Charles McCann. 1937. Notes on the common land crab Paratelphusa (Barytelphusa) guerini (M.) of Salsette Island. J. Bombay Nat. Hist. Soc. . 39. 3. 531–542.
  14. Web site: kuttettan. munnar. kallettumkara. raphy. eBird checklist from Pothamedu, Munnar. 6 February 2022.
  15. Sayyed. Amit. Gokulkrishnan. G. Patil. Rajgopal. Mahabal. Anil. 2017. Malabar Whistling Thrush feeding on rat snake. Indian Birds. 14. 57–58.
  16. McCann, C. 1931. Notes on the Whistling School Boy or Malabar Whistling Thrush (Myiophoneus horsfieldi, Vigors). J. Bombay Nat. Hist. Soc.. 35. 1. 202–204.
  17. Navarro, SJ . 1981. Observations of pair formation . . 21. 5. 3–7.
  18. Betham, R M . 1903. Curious site for nesting chosen by the Malabar Whistling-Thrush Myiophoneus horsfieldi. J. Bombay Nat. Hist. Soc. . 14. 4. 815.
  19. Book: Anoop Das, K.S.. Vijayan L. . 2003. Nest and nest site selection of Malabar Whistling Thrush in Silent Valley. Proc. of the 28th Conference of the Ethological Soc. of India, Mundanthurai, Tirunelveli . R. Annamalai. M,. Narayanan . Juliet Vanitharani. Dept. Zool. Sara Tucker College, Tirunelveli & Tamil Nadu Forest Dept, KMTR, Tirunelveli. 83–86.
  20. Book: Whistler, Hugh. 1949. Popular Handbook of Indian Birds. Edition 4.. Gurney and Jackson, London. 119–120.
  21. Book: Ali, Salim. 1996. The Book of Indian Birds. Edition 12.. BNHS & Oxford University Press. 285–286.
  22. Book: 124–127. The nests and eggs of Indian birds. Volume 1. Hume, AO. 1889. R H Porter, London. Allan Octavian Hume.

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