Cape Verde warbler

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Cape Verde warbler
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Acrocephalidae
Genus: Acrocephalus
Species: A. brevipennis
Binomial name
Acrocephalus brevipennis
(Keulemans, 1866)

The Cape Verde warbler (Acrocephalus brevipennis) is an Old World warbler in the genus Acrocephalus. It is also known as the Cape Verde cane warbler or Cape Verde swamp warbler, and in Creole as tchota-de-cana, chincherote,[2] (also tchintchirote,[3]). It breeds on Santiago, Fogo and S. Nicolau in the Cape Verde Islands.[4][5] It previously bred on Brava. This small passerine bird is found in well-vegetated valleys, avoiding drier areas. It nests in reedbeds, two to three eggs being laid in a suspended nest.[6]

Description[edit]

This is a medium-sized warbler, larger than the Eurasian reed warbler. It resembles that bird in appearance, grey-brown above, greyish-white below, with no obvious markings. The geographical isolation of the bird on the Cape Verde Islands prevents confusion with other similar species. The song is a distinctive liquid bubbling, like that of a bulbul.[6]

Distribution and habitat[edit]

At one time it was thought that the Cape Verde warbler was restricted to the island of Santiago. After a specimen was found in a Lisbon museum, a survey was made on São Nicolau island in 1998 and some individuals were found there.[7] In 2004 a further population was discovered on Fogo island[8] and further survey found it was widespread across the north of the island up to altitudes of about 1,300 m.[5] On Santiago it can be found across the whole island, including in Barragem de Poilão, S. Jorge, Serra Malagueta, Rui Vaz and Tarrafal.[5][9] Although previously thought to be mainly restricted to woodland and scrub, it is now reported from a wider range of habitats including well-vegetated valleys, reedbeds, cultivated land and around water sources such as dams.[1]

Status[edit]

The population trend of the Cape Verde warbler is thought to be declining, probably because of habitat destruction and the droughts that have beset the islands.[10] With its restricted range and relatively small population, the conservation status of this bird has been assessed by the International Union for Conservation of Nature as being "endangered".[4][11]

References[edit]

  1. ^ a b BirdLife International (2012). "Acrocephalus brevipennis". IUCN Red List of Threatened Species. Version 2016.2. International Union for Conservation of Nature. Retrieved 26 November 2016. 
  2. ^ "chincherote". Língua Portuguesa com Acordo Ortográfico. Infopedia. Retrieved 27 November 2016. 
  3. ^ Teodoro, Melissa. "Dancing voices" (PDF). Retrieved 27 November 2016.  Note: because of different spelling systems in use it's also found as txintxiroti.
  4. ^ a b "Cape Verde Swamp-warbler (Acrocephalus brevipennis) - BirdLife species factsheet". datazone.birdlife.org. Retrieved 2017-04-25. 
  5. ^ a b c Batalha, Helena R.; Wright, David J.; Barr, Iain; Collar, Nigel J.; Richardson, David S. (2017-04-01). "Genetic diversity and divergence in the endangered Cape Verde warbler Acrocephalus brevipennis". Conservation Genetics. 18 (2): 343–357. doi:10.1007/s10592-016-0909-3. ISSN 1566-0621. 
  6. ^ a b Donald, P. F.; Taylor, R.; de Ponte Machado, M.; Pitta Groz, M. J.; Wells, C. E.; Marlow, T.; Hille, S. M. (2004). "Status of the Cape Verde Cane Warbler Acrocephalus brevipennis on São Nicolau, with notes on song, breeding behaviour and threats" (PDF). Malimbus. 26: 34–37. 
  7. ^ [null Hazevoet CJ, Monteiro LR, Ratcliffe N (1999) Rediscovery of the Cape Verde Cane Warbler Acrocephalus brevipennis on São Nicolau in February 1998. Bulletin of the British Ornithologists' Club, 4.]
  8. ^ [null Hering J, Hering (2005) Discovery of Cape Verde Warbler Acrocephalus brevipennis on Fogo, Cape Verde Islands. Bulletin of the African Bird Club, 12, 3.]
  9. ^ [null Garcia-del-Rey E (2016) Birds of the Cape Verde Islands. Sociedad Ornitologica Canaria, Barcelona, Spain.]
  10. ^ [null Hazevoet CJ (1995) The birds of the Cape Verde islands: an annotated checklist. British Ornithologists’ Union, Tring.]
  11. ^ "Acrocephalus brevipennis (Cape Verde Cane Warbler, Cape Verde Islands Cane Warbler, Cape Verde Swamp-warbler, Cape Verde Swamp-Warbler, Cape Verde Warbler)". www.iucnredlist.org. Retrieved 2017-04-25.