African pitta

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African pitta
African Pitta (Pitta angolensis), Hwange National Park, Zimbabwe.jpg
P. a. longipennis in Zimbabwe
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Pittidae
Genus: Pitta
Species:
P. angolensis
Binomial name
Pitta angolensis
Vieillot, 1816
African Pitta Distribution.jpg
Range
  Resident (western races only)
  Overwintering visitor
  Passage migrant
  Breeding visitor
Pitta angolensis longipennis, Mosambiek, Birding Weto, a.jpg
Pitta angolensis longipennis, Mpigwe-kamp, Catapu, Birding Weto, a.jpg
Breeding birds in central Mozambique

The African pitta (Pitta angolensis) is an Afrotropical bird of the family Pittidae. It is a locally common [2] to uncommon species, resident and migratory in the west, and an intra-African migrant between equatorial and southeastern Africa. [3] They are elusive and hard to observe despite their brightly coloured plumage, [4] and their loud, explosive calls are infrequently heard. The plump, somewhat thrush-like birds [5] forage on leaf litter under the canopy of riparian or coastal forest and thickets, [6] or in climax miombo forest. They spend much time during mornings and at dusk scratching in leaf litter or around termitaria, [7] or may stand motionless for long periods. [8] Following rains [9] breeding birds call and display from the mid-canopy. [8]

Contents

Taxonomy

The African pitta was described by the French ornithologist Louis Pierre Vieillot in 1816 and given the binomial name Pitta angolensis. [10] Vieillot had introduced the genus Pitta in another book published in the same year. [11]

Three subspecies are recognised: [12]

The closely related green-breasted pitta (Pitta reichenowi) replaces the African pitta in the interior of Africa's tropical rainforests. Together the two species form part of a wide-ranging Old World superspecies, which in relatively recent times colonised Africa from the east. [9]

It has been suggested that the races pulih and angolensis may be conspecific with the green-breasted pitta. The migratory race longipennis may also be a separate species. [13]

Description

The sexes are alike. [8] The crown, face, and ear coverts are solid black, and the throat is pale salmon pink. The broad eyebrow is buff to brownish buff. The flanks, breast, and side of the neck are a mustard yellow, washed olive on the upper breast. Some western birds have the breast very greenish. [14] The wing coverts are deep green and tipped turquoise blue, or black and tipped turquoise and royal blue. The mantle and back are green, and the rump and upper tail coverts pale turquoise blue. The wings are rounded, and the primaries are black with pale and white tips. The bases of the central primaries form a white square, conspicuous in flight [5] or display. The belly and undertail coverts are crimson red, and the legs are pink. Immature birds have a duller plumage with a buffy-pink vent [8] and fawn-coloured throat. [7]

Distribution and habitat

The African pitta is a migratory species to southeastern Africa and the Congo Basin. Its breeding habitat in southeastern Africa is deciduous, [15] lowland riparian forest or thicket [3] with intermittent dense understorey and small sub-canopy glades. [4] On migration however, they may sojourn at any areas of bush or woodland. Fallen dead trees and open branches are favoured perches when performing their peculiar bouncing display. [4] They are more numerous in undisturbed vegetation, and the opening up of the riparian woodland by elephants may reduce their habitat. [4]

Migration

The race P. a. longipennis spends the austral winter in the western Ugandan forests as far north as Budongo, and coastal Kenya as far north as Gedi ruins. [3] A bird found at Minziro Forest in northwestern Tanzania was in heavy moult, suggestive that the area is on the southeastern fringe of the non-breeding range. [6]

They arrive in southern Africa from late October, though mainly in November and early December. [3] They seldom breed north of the Rukwa Valley [3] and Rufiji River in Tanzania, [6] and no further south than central Mozambique. They depart again in February, though occasionally as late as April. [4] [9] Ringing studies in the Pugu hills and Mufindi have confirmed the timing of northwestward migration. [6] Exhausted and perished birds are regularly found during migration, especially November to December and April to June. [3] Southward migrating birds sometimes overshoot when they follow moist tropical fronts (at night), which may account for their vagrancy in the north-eastern Transvaal and the Zimbabwean plateau. [4] Some reverse migration has been noted after the breeding season. [16]

Behaviour

Habits and foraging

The African pitta moves about by quick hops. [7] It forages singly on leaf litter, where it scratches to uncover insects and mollusks. It may flit the tail as it walks, and run or jump to a low branch when alarmed, [5] or fly to a high branch where it hides by crouching. [7] It has a fast and direct flight. [5]

It has various call notes, including a querulous scolding skeeow, noted by Moreau, a short, deep trill followed by a wing-clap, [5] and a sproo note, accompanied by a small jump. [7] A croaking call may be heard during migration, [8] and a guttural alarm note has been recorded. [7]

Breeding

Egg Faune de la Senegambie, vertebres (1883) (14770887764), Pitta angolensis.jpg
Egg

They are probably monogamous, and display for a few weeks after arrival. [15] Displaying birds utter a far-carrying and explosive quoip as they leap from a lateral branch in mid-canopy. [8] At the same time the wings are opened to reveal the white bases to the primary feathers. Pairs may be spaced 150 meters from one another. [15]

The bulky, untidy nest [15] is a dome-shape structure composed of small sticks, grass and dry leaves. [4] [7] The inside is lined with finer twigs, tendrils and some dry leaves. [7] It is placed 2 to 4 metres (6.6 to 13.1 ft) above ground in the fork of a sapling, or in the thorny and leafy branches of Acacia , Ziziphus , Ximenia or Dichrostachys . A projecting lip beside the side entrance is used as a landing platform. [15] Egg-laying takes place from November to December [4] [9] in southeastern Africa, and the birds fall silent once incubation starts. [15] Three to four eggs are laid. They are white or cream in colour, [7] and flecked with grey undermarkings and liver-red to blackish-brown markings near the thicker end. [15] They measure 28 by 23.5 mm (1.10 by 0.93 in). [16] The nestlings are altricial and nidicolous. [15]

Status

A decline has been noted in the coastal forests of Kenya after 1983. [5] Concern has been expressed about lighted buildings in coastal Tanzania, which might pose a collision risk, as the birds are nocturnal migrants. [6] Breeding habitat in the Zambezi valley has been impacted by elephants [4] and agricultural expansion. Habitat loss and fragmentation is ongoing. [17]

Monograph

Pitta Angolensis by Daniel Giraud Elliot in 1893 Pitta Angolensis by Daniel Giraud Elliot in 1893.jpg
Pitta Angolensis by Daniel Giraud Elliot in 1893

In 1893, Daniel Giraud Elliot, an American zoologist, published a monograph of the Pitta angolensis. [18]

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References

  1. ↑ BirdLife International (2016). "Pitta angolensis". IUCN Red List of Threatened Species . 2016: e.T22698671A93696398. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22698671A93696398.en . Retrieved 12 November 2021.
  2. ↑ Lambert, F.; Woodcock, M. (1996). Pittas, broadbills and asities. Robertsbridge, U.K.: Pica Press. ISBN   1873403240.
  3. 1 2 3 4 5 6 Britton, P. L., ed. (1980). Birds of East Africa: their habitat, status and distribution. Nairobi: East Africa Natural History Society. pp.  112.
  4. 1 2 3 4 5 6 7 8 9 Tree, A. J. Angola Pitta (PDF). South African Bird Atlas Project (SABAP).
  5. 1 2 3 4 5 6 Zimmerman, Dale A.; et al. (1999). Birds of Kenya and Northern Tanzania. Princeton University Press. p. 495. ISBN   0691010226.
  6. 1 2 3 4 5 "African Pitta". Preliminary Map. Tanzania Bird Atlas. Retrieved 4 December 2013.
  7. 1 2 3 4 5 6 7 8 9 McLachlan, G. R.; Liversidge, R. (1965). Roberts birds of South Africa (5th impression, revised ed.). Cape Town: John Voelcker Bird Book Fund. p. 246. ISBN   0620005750.
  8. 1 2 3 4 5 6 Terry Stevenson; John Fanshawe (2004). Birds of East Africa: Kenya, Tanzania, Uganda, Rwanda, Burundi. Helm Field Guides. p. 278. ISBN   0713673478.
  9. 1 2 3 4 Irwin, M. P. S. (1981). The Birds of Zimbabwe. Salisbury: Quest Publishing. pp. 221–222. ISBN   086-9251-554.
  10. ↑ Vieillot, Louis Pierre (1816). Nouveau dictionnaire d'histoire naturelle, appliquée aux arts, à l'agriculture, à l'économie rurale et domestique, à la médecine, etc (in French). Vol. 4. Paris: Deterville. pp. 356–357. doi:10.5962/bhl.title.20211.
  11. ↑ Vieillot, Louis Pierre (1816). Analyse d'une Nouvelle Ornithologie Élémentaire (in French). Paris: Deterville/self. p. 42, Num. 137.
  12. ↑ Gill, Frank; Donsker, David, eds. (2019). "NZ wrens, broadbills & pittas". World Bird List Version 8.2. International Ornithologists' Union. Retrieved 15 January 2019.
  13. ↑ Borrow, Nik; Demey, Ron (2014). Birds of Western Africa (2nd ed.). London: Christopher Helm. p. 302. ISBN   978-1-4729-0568-0.
  14. ↑ Borrow, Nik. "The Internet Bird Collection". Photos: African Pitta (Pitta angolensis). Retrieved 3 December 2013.
  15. 1 2 3 4 5 6 7 8 Tarboton, Warwick (2001). A Guide to the Nests and Eggs of Southern African Birds. Cape Town: Struik. p. 141. ISBN   1-86872-616-9.
  16. 1 2 McLachlan, G. R.; Liversidge, R. (1978). Roberts Birds of South Africa (4th ed.). Cape Town: John Voelcker Bird Book Fund. p. 328. ISBN   0-620-03118-2.
  17. ↑ del Hoyo, J.; Elliott, A.; Christie, D. (2003). Handbook of the Birds of the World, vol. 8: Broadbills to Tapaculos. Barcelona: Lynx Edicions.
  18. ↑ Annual Report of the Board of Regents of the Smithsonian Institution. 1917/18-1963/64: Publication / Smithsonian Institution. The Institution. 1896. p. 185. Retrieved 10 December 2019.
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