Chorister robin-chat

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Chorister robin-chat
Chorister Robin-Chat 2016 06 11 6798.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Muscicapidae
Genus: Cossypha
Species:
C. dichroa
Binomial name
Cossypha dichroa
(Gmelin, JF, 1789)

The chorister robin-chat (Cossypha dichroa) (previously known as the chorister robin) is a species of bird in the Old World flycatcher family Muscicapidae. It is found in South Africa and Eswatini. Its distribution stretches from the southern Western Cape through the Eastern Cape, KwaZulu-Natal, and Mpumalanga to northern Limpopo. Its natural habitat is evergreen forests, especially in the mist belt region.

Contents

Taxonomy

The chorister robin-chat was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae . He placed it with the flycatchers in the genus Muscicapa and coined the binomial name Muscicapa dichroa. [2] Gmelin specified the locality as South Africa. This was restricted to Knysna in Western Cape province by Phillip Clancey in 1966. [3]

Gmelin based his account on the "Muscicapa bicolor" that had been described and illustrated in 1787 by the Swedish naturalist Anders Sparrman. The hand-coloured engraved plate had been drawn by Jonas Carl Linnerhielm. [4] The combination Muscicapa bicolor had been previously introduced in 1783 by the Dutch naturalist Pieter Boddaert for a different taxon [5] and therefore under the rules of the International Code of Zoological Nomenclature Muscicapa bicolor Sparrman, 1787 is a junior homonym and is permanently invalid. [6] [7] The senior homonym Muscicapa bicolor Boddaert, 1783 is a junior synonym of Merops pusillus Müller, PLS, 1776, the little bee-eater. [8] [9] The chorister robin-chat is now placed in the genus Cossypha that was introduced in 1825 by Nicholas Vigors. [9]

Two subspecies are recognised: [9]

Description

This is a large robin-chat, about 20 cm (7.9 in) in length. It is identified by its dark upperparts (the ear coverts and lores are slightly darker than the rest of the face, head, neck and back) and yellow-orange underparts. It has no white eye stripe. Juveniles have a sooty, mottled tawny-buff above and below and its tail is red-orange with a dark centre.

Behaviour

Feeding

The chorister robin-chat is generally solitary. It forages in the forest canopy where it gleans insects from leaves but from April to September during the non-breeding season it may also forage on the ground. Its diet consists mainly of insects, millipedes, spiders, ticks but also fruit in the non-breeding season. [11]

Breeding

Breeding takes place from October to early January. The open cup nest is built by the female and is usually placed less than 5 m (16 ft) above the ground in a hole or crevice in a tree trunk. Sometimes the nest will be placed on the ground. The three eggs in the clutch are pale blue, blue-green, olive-green or olive-brown. They occasionally have dark spots. The eggs are incubated for 15–19 days. The young fledge after 14–15 days but remain with their parents for up to six weeks. [11]

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References

  1. BirdLife International (2017). "Cossypha dichroa". IUCN Red List of Threatened Species . 2017: e.T22709834A119069488. doi: 10.2305/IUCN.UK.2017-3.RLTS.T22709834A119069488.en . Retrieved 12 November 2021.
  2. Gmelin, Johann Friedrich (1789). Systema naturae per regna tria naturae : secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Vol. 1, Part 2 (13th ed.). Lipsiae [Leipzig]: Georg. Emanuel. Beer. p. 949.
  3. Clancey, P.A. (1966). "A catalogue of birds of the South African sub-region". Durban Museum Novitates. 7 (11): 389-464 [451-452].
  4. Sparrman, Andreas (1787). Museum Carlsonianum, in quo novas et selectas aves, coloribus ad vivum brevique descriptione illustratas, suasu et sumtibus generosissimi possessoris (in Latin). Vol. 2. Holmiae: Ex Typographia Regia. Plate 46.
  5. Boddaert, Pieter (1783). Table des planches enluminéez d'histoire naturelle de M. D'Aubenton : avec les denominations de M.M. de Buffon, Brisson, Edwards, Linnaeus et Latham, precedé d'une notice des principaux ouvrages zoologiques enluminés (in French). Utrecht. p. 19, Number 318.
  6. Mathews, Gregory M.; Iredale, Tom (1915). "On the 'Tables des Planches Enlum.' of Boddaert". Austral Avian Record. 3: 31-51 [43].
  7. "57.2 Primary homonyms". International Code Of Zoological Nomenclature (4th ed.). International Commission on Zoological Nomenclature. 1999.
  8. Günther, Albert, ed. (1892). Catalogue of the Birds in the British Museum. Vol. 17. London: Trustees of the British Museum. p. 47.
  9. 1 2 3 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2023). "Chats, Old World flycatchers". IOC World Bird List Version 13.2. International Ornithologists' Union. Retrieved 16 August 2023.
  10. Clancey, P.A. (1981). "Miscellaneous taxonomic notes on African birds LX". Durban Museum Novitates. 13 (1): 1-12 [9].
  11. 1 2 Clement, Peter; Rose, Chris (2015). Robins and Chats. Helm Identification Guides. London: Bloomsbury. pp. 338–339. ISBN   978-0-7136-3963-6.