Ground hornbill

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Ground hornbill
Temporal range: Middle Miocene to present
Bucorvus abyssinicus Wytsman.jpg
Head of the male Abyssinian
ground hornbill
(B. abyssinicus)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Bucerotiformes
Family: Bucorvidae
Bonaparte, 1854
Genus: Bucorvus
Lesson, 1830
Species

Bucorvus leadbeateri
Bucorvus abyssinicus
See text for the possible inclusion of Bycanistes

The ground hornbills (Bucorvidae) are a family of the order Bucerotiformes, with a single genus Bucorvus and two extant species. The family is endemic to sub-Saharan Africa: the Abyssinian ground hornbill occurs in a belt from Senegal east to Ethiopia, and the southern ground hornbill occurs in southern and East Africa.

Ground hornbills are large, with adults around a metre tall. Both species are ground-dwelling, unlike other hornbills. Also unlike most other hornbills, they are carnivorous and feed on insects, snakes, other birds, amphibians and even tortoises. [1] They are among the longest-lived of all birds, [2] and the larger southern species is possibly the slowest-breeding (triennially) and longest-lived of all birds. [3]

Taxonomy

The genus Bucorvus was introduced, originally as a subgenus, by the French naturalist René Lesson in 1830 with the Abyssinian ground hornbill Bucorvus abyssinicus as the type species. [4] [5] The generic name is derived from the name of the genus Buceros introduced by Carl Linnaeus in 1758 for the Asian hornbills where corvus is the Latin word for a "raven". [6]

A molecular phylogenetic study published in 2013 found that the genus Bucorvus was sister to the rest of the hornbills. [7]

The genus Bucorvus contains two species: [8]

Genus Bucorvus Lesson, 1830 – two species
Common nameScientific name and subspeciesRangeSize and ecologyIUCN status and estimated population
Abyssinian ground hornbill, northern ground hornbill

Abyssinian Ground Hornbill RWD3.jpg
Male
Noerdlicher Hornrabe Bucorvus abyssinicus Tierpark Hellabrunn-11.jpg
Female

Bucorvus abyssinicus
(Boddaert, 1783)
southern Mauritania, Senegal and Guinea east to Eritrea, Ethiopia, north western Somalia, north western Kenya and Uganda
Bucorvus abyssinicus distribution map.png
Size:

Habitat:

Diet:
 LC 


Southern ground hornbill

Southern Ground Hornbill (Bucorvus leadbeateri) male (30397098174).jpg
Male
Southern Ground-hornbill (Bucorvus leadbeateri) -side beak open.jpg
Female

Bucorvus leadbeateri
(Vigors, 1825)
northern Namibia and Angola to northern South Africa and southern Zimbabwe to Burundi and Kenya
Bucorvus leadbeateri distribution map.png
Size:

Habitat:

Diet:
 VU 



A prehistoric ground hornbill, Bucorvus brailloni , has been described from fossil bones in Morocco, suggesting that prior to Quaternary glaciations the genus was either much more widespread or differently distributed. [9]

It is currently thought that the ground hornbills, along with Tockus and Tropicranus , are almost exclusively carnivorous [1] and lack the gular pouch that allows other, less closely related hornbill genera to store fruit.

Related Research Articles

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References

  1. 1 2 Kinnaird Margaret F. and O‘Brien< Timothy G.; The Ecology and Conservation of Asian Hornbills: Farmers of the Forest; pp. 20-23. ISBN   0226437124
  2. Wasser, D. E. and Sherman, P.W.; “Avian longevities and their interpretation under evolutionary theories of senescence” in Journal of Zoology 2 November 2009
  3. Skutch; Alexander Frank (author) and Gardner, Dana (illustrator) Helpers at birds' nests : a worldwide survey of cooperative breeding and related behavior pp. 69-71. Published 1987 by University of Iowa Press. ISBN   0877451508
  4. Lesson, René (1830). Traité d'Ornithologie, ou Tableau Méthodique (in French). Vol. 1. Paris: F.G. Levrault. p. 256 (livre 4).
  5. Peters, James Lee, ed. (1945). Check-list of Birds of the World. Vol. 5. Cambridge, Massachusetts: Harvard University Press. p. 272.
  6. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p.  80. ISBN   978-1-4081-2501-4.
  7. Gonzalez, J.-C.T.; Sheldon, B.C.; Collar, N.J.; Tobias, J.A. (2013). "A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae)". Molecular Phylogenetics and Evolution. 67 (2): 468–483. doi:10.1016/j.ympev.2013.02.012. PMID   23438388.
  8. Gill, Frank; Donsker, David, eds. (2019). "Mousebirds, Cuckoo Roller, trogons, hoopoes, hornbills". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 23 July 2019.
  9. Kemp, A. C. 1995 The Hornbills. Oxford University Press, Oxford.