Piapiac

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Piapiac
Piapiac Kedougou.jpg
adult with beak full of termites
Piapiac (Ptilostomus afer) sub-adult (l) and immature (r).jpg
sub-adult (l) and immature (r)
Semliki Wildlife Reserve, Uganda
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Corvidae
Genus: Ptilostomus
Swainson, 1837
Species:
P. afer
Binomial name
Ptilostomus afer
(Linnaeus, 1766)
Ptilostomus distribution map.jpg
Distribution map
Synonyms

Corvus aferLinnaeus, 1766

The piapiac (Ptilostomus afer) is an African bird in the crow family, and is the only member of the genus Ptilostomus. It is most closely related to the Central Asian ground jays.

Contents

Taxonomy

In 1760 the French zoologist Mathurin Jacques Brisson included a description of the piapiac in his Ornithologie based on a specimen collected in Senegal. He used the French name La pie du Sénégal and the Latin Pica Senegalensis. [2] Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. [3] When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition, he added 240 species that had been previously described by Brisson. [3] One of these was the piapiac. Linnaeus included a brief description, coined the binomial name Corvus afer and cited Brisson's work. [4] The specific name afer is Latin for "Africa". [5] The piapiac is the only species placed in the genus Ptilostomus that was introduced by the English naturalist William John Swainson in 1837. [6] [7] [8] The species is monotypic. [8]

A molecular phylogenetic study published in 2005 found that the piapiac from Africa was most closely related to the ground jays in the genus Podoces that inhabit Central Asia. [9]

Description

In size it is a little smaller and slimmer than the European magpie (Pica pica) though the bill is relatively thicker. It is 35–42 cm (14–17 in) in length and weighs 121–130 g (4.3–4.6 oz). The overall colouring is black with the feathers quite silky in texture and having a purplish gloss in good light. The base of the tail tends to be more brown in colour than the rest of the body. Unusual for a passerine it has 10 rather than 12 tail feathers. The nasal plumes are somewhat upturned on top of the bill but fully cover the nostrils. The bill itself is black in the adult but partly reddish-pink towards the base in juvenile specimens. The bird's legs and feet are black and the iris is variable, but tends towards violet, purple or mauve with a bluish-purple outer ring. The voice is usually described as a shrill squeaking often with the jackdaw-like overtones. There is also a croaking alarm call given in anger where the head bobs. [10]

Distribution and habitat

The range of the species is the tropical equatorial region of central Africa from Senegal on the west coast, eastwards in a broad band to Sudan and southern Ethiopia. Within this range, its favoured habitat is towards more open country of cultivated land with fields and pasture and small associated towns and villages.

Behaviour

Feeding

Food is obtained in flocks of ten or more birds moving together on the ground including insects and other invertebrates but will take a degree of carrion, possibly attracted as much by the associated insects this attracts as much as the meat itself. Some fruit is also taken in trees with the oily fruit of the oil palm Elaeis guineensis a favourite. Able to run fast with some agility, it tends to hop at slower speed and will catch insects disturbed by the feet of cattle, sometimes hitching a ride on their backs and darting out to catch the prey.

Breeding

The piapiac often nests in a palm tree, but other nesting sites are also used. Strips of palm leaf and grass stems are cemented together with mud and lined with palm fibre to form a cup, in which three to seven eggs are laid between March and April. Piapiac eggs are very pale blue, or greenish-blue with a few brown blotches.

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References

  1. BirdLife International (2017). "Ptilostomus afer". IUCN Red List of Threatened Species . 2017: e.T22705925A118780210. doi: 10.2305/IUCN.UK.2017-3.RLTS.T22705925A118780210.en . Retrieved 11 November 2021.
  2. Brisson, Mathurin Jacques (1760). Ornithologie, ou, Méthode contenant la division des oiseaux en ordres, sections, genres, especes & leurs variétés (in French and Latin). Vol. 2. Paris: Jean-Baptiste Bauche. pp. 40–41, Plate 3 fig 2. The two stars (**) at the start of the section indicates that Brisson based his description on the examination of a specimen.
  3. 1 2 Allen, J.A. (1910). "Collation of Brisson's genera of birds with those of Linnaeus". Bulletin of the American Museum of Natural History. 28: 317–335. hdl:2246/678.
  4. Linnaeus, Carl (1766). Systema naturae : per regna tria natura, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Vol. 1, Part 1 (12th ed.). Holmiae (Stockholm): Laurentii Salvii. p. 157.
  5. Jobling, J.A. (2018). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Key to Scientific Names in Ornithology". Handbook of the Birds of the World Alive. Lynx Edicions. Retrieved 16 May 2018.
  6. Swainson, William John (1837). On the Natural History and Classification of Birds. Vol. 2. London: John Taylor. p. 266.
  7. Mayr, Ernst; Greenway, James C. Jr, eds. (1962). Check-List of Birds of the World. Vol. 15. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 260.
  8. 1 2 Gill, Frank; Donsker, David, eds. (2018). "Crows, mudnesters, birds-of-paradise". World Bird List Version 8.1. International Ornithologists' Union. Retrieved 16 May 2018.
  9. Ericson, Per G. P.; Jansén, Anna-Lee; Johansson, Ulf S.; Ekman, Jan (2005). "Inter-generic relationships of the crows, jays, magpies and allied groups (Aves: Corvidae) based on nucleotide sequence data" (PDF). Journal of Avian Biology. 36 (3): 222–234. CiteSeerX   10.1.1.493.5531 . doi:10.1111/j.0908-8857.2001.03409.x.
  10. dos Anjos, L. (2009). "Family Corvidae (Crows)" . In del Hoyo, J.; Elliott, A.; Sargatal, J. (eds.). Handbook of the Birds of the World. Vol. 14: Bush-shrikes to Old World Sparrows. Barcelona, Spain: Lynx Edicions. pp. 494–640 [616–617]. ISBN   978-84-96553-50-7.