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Dark-fronted babbler

Dark-fronted babbler
Dumetia atriceps nigrifrons at Kanneliya Forest Reserve, Sri Lanka
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Timaliidae
Genus: Dumetia
Species:
D. atriceps
Binomial name
Dumetia atriceps
(Jerdon, 1839)
Synonyms
  • Alcippe atriceps
  • Rhopocichla atriceps

The dark-fronted babbler (Dumetia atriceps) is an Old World babbler found in the Western Ghats of India and the forests of Sri Lanka. They are small chestnut brown birds with a dark black cap, a whitish underside and pale yellow iris. They forage in flocks in the undergrowth of forests constantly making calls and uttering alarm calls when disturbed.

Taxonomy

The dark-fronted babbler was formally described in 1839 by the English naturalist Thomas Jerdon under the binomial name Brachypteryx atriceps. He specified the range as Thrissur, Wadakkancherry, Coonoor and the Wayanad of southwest India.[2] The type locality was restricted to Wayanad by Hugh Whistler in 1935.[3][4] The dark-fronted babbler was formerly placed in the monotypic genus Rhopocichla. It was moved to Dumetia with the tawny-bellied babbler based on the results of a large molecular phylogenetic study published in 2019.[5][6] The genus Dumetia was introduced in 1852 by the English zoologist Edward Blyth.[7] The genus name is from Latin dumetum, dumeti meaning "thicket". The specific epithet atriceps combines the Latin ater meaning "black" with -ceps meaning "-capped" or "-headed".[8]

Four subspecies are recognised:[6]

  • D. a. atriceps (Jerdon, 1839) – west to south India
  • D. a. bourdilloni (Hume, 1876) – southwest to south India
  • D. a. siccata (Whistler, 1941) – north, east Sri Lanka
  • D. a. nigrifrons (Blyth, 1849) – southwest Sri Lanka

Description

The dark-fronted babbler measures 13 cm including its square-tipped tail. It is brown above and white below. The two subspecies in the Western Ghats have black hoods, but the two Sri Lankan races have this reduced to a dark bandit mask. The pale yellow iris stands in contrast. The subspecies in the southern Western Ghats bourdilloni has a duller sooty-black hood, browner underside[9] and the upper parts are more olive. The nominate form found north of the Palghat Gap has the hood dark black. In Sri Lanka, the subspecies siccata is found in the lower elevation while nigrifrons is found in the wet zone. The former has more olive on the upperparts while the later is rufescent on the upperparts.[10]

Behaviour and ecology

Babblers have a weak flight and are residents within their range. They forage in parties and clamber up vegetation and when disturbed, they tend to drop from the topmost perches of the bush into the undergrowth.[11] Their typical habitat is undergrowth in forest or on the edge of forests in more open growth.[10] Their food is mainly insects. They can be difficult to observe in the dense vegetation they prefer, but like other babblers, these are noisy birds, and their characteristic rattling churr alarm calls are often the best indication that these birds are present.[12] They often join mixed-species foraging flocks.[13]

The breeding season is May to July. This babbler builds its nest low down in a bush, the nest being a ball of leaves, often of bamboo. The nest looks like some dry leaves stuck in a bush with the opening on the side.[14] The normal clutch is two eggs. They are also said to construct dormitory nests within which birds may sometimes roost. These dormitory nests are not lined.[15][16][17]

References

  1. ^ BirdLife International (2016). "Dumetia atriceps". IUCN Red List of Threatened Species. 2016: e.T22716289A94489395. doi:10.2305/IUCN.UK.2016-3.RLTS.T22716289A94489395.en. Retrieved 13 November 2021.
  2. ^ Jerdon, Thomas C. (1839). "A catalogue of the birds of the Peninsula of India, arranged according to the modern system of classification; with brief notes on the habits and geographical distribution, and descriptions of new, doubtful and imperfectly described species". Madras Journal of Literature and Science. 10 (25): 234 [250–251].
  3. ^ Ali, S.; Whistler, H. (1935). "The ornithology of Travancore and Cochin". Journal of the Bombay Natural History Society. 38: 61-92 [82].
  4. ^ Mayr, Ernst; Paynter, Raymond A. Jr, eds. (1964). Check-List of Birds of the World. Vol. 10. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 317-318.
  5. ^ Cai, T.; Cibois, A.; Alström, P.; Moyle, R.G.; Kennedy, J.D.; Shao, S.; Zhang, R.; Irestedt, M.; Ericson, P.G.P.; Gelang, M.; Qu, Y.; Lei, F.; Fjeldså, J. (2019). "Near-complete phylogeny and taxonomic revision of the world's babblers (Aves: Passeriformes)". Molecular Phylogenetics and Evolution. 130: 346–356. doi:10.1016/j.ympev.2018.10.010.
  6. ^ a b Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2022). "Babblers & fulvettas". IOC World Bird List Version 12.2. International Ornithologists' Union. Retrieved 24 September 2022.
  7. ^ Blyth, Edward (1852). Catalogue of the Birds in the Museum Asiatic Society. Calcutta: J. Thomas. p. 140. Although the title page is dated 1849, the book was not published until 1852. 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. 74. ISBN 978-0-9568611-1-5.
  8. ^ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 142, 59. ISBN 978-1-4081-2501-4.
  9. ^ Baker, EC Stuart (1922). Fauna of British India. Birds. Volume 1 (2nd ed.). Taylor and Francis, London. pp. 281–282.
  10. ^ a b Rasmussen PC; JC Anderton (2005). Birds of South Asia: The Ripley Guide. Volume 2. Smithsonian Institution & Lynx Edicions. p. 441.
  11. ^ Ali, S; Ripley SD (1996). Handbook of the Birds of India and Pakistan. Volume 6. New Delhi: Oxford University Press. pp. 183–185.
  12. ^ Collar, N. J.; Robson, C. (2007). "Family Timaliidae (Babblers)". In del Hoyo, J.; Elliott, A.; Christie, D.A. (eds.). Handbook of the Birds of the World, Vol. 12. Picathartes to Tits and Chickadees. Lynx Edicions, Barcelona. pp. 70–291.
  13. ^ Kotagama, SW; E Goodale (2004). "The composition and spatial organisation of mixed-species flocks in a Sri Lankan rainforest" (PDF). Forktail. 20: 63–70.[permanent dead link‍]
  14. ^ Wait, WE (1922). "The Passerine birds of Ceylon". Spolia Zeylanica. 12: 48–49.
  15. ^ Betts, FN (1935). "Nidification of the Blackheaded Babbler Rhopocichla a. atriceps (Oates)". J. Bombay Nat. Hist. Soc. 38 (1): 189.
  16. ^ Whistler, Hugh (1949). Popular handbook of Indian birds (4th ed.). Gurney and Jackson, London. pp. 56–57.
  17. ^ Bates, W (1934). "Nidification of the Travancore Laughing Thrush Trochalopteron jerdoni fairbanki (Blanf.) and the Black-headed Babbler Rhopocichla atriceps atriceps (Oates)". J. Bombay Nat. Hist. Soc. 37 (3): 727.
Quelle: http://en.wikipedia.org/wiki/Rhopocichla_atriceps