Double-spurred spurfowl | |
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A covey in central Cameroon | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Galliformes |
Family: | Phasianidae |
Genus: | Pternistis |
Species: | P. bicalcaratus |
Binomial name | |
Pternistis bicalcaratus (Linnaeus, 1766) | |
geographic distribution | |
Synonyms | |
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The double-spurred spurfowl (Pternistis bicalcaratus) is a gamebird in the pheasant family Phasianidae of the order Galliformes, gallinaceous birds. Like most spurfowls, it is restricted to Africa. It is a resident breeder in tropical west Africa, but there is a small and declining isolated population in Morocco.
In 1760 the French zoologist Mathurin Jacques Brisson included a description of the double-spurred spurfowl in his Ornithologie based on a specimen that had been collected in Senegal. He used the French name La Perdrix du Sénégal and the Latin Perdix 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 double-spurred spurfowl. Linnaeus included a brief description, coined the binomial name Tetrao bicalcaratus and cited Brisson's work. [4] The specific epithet bicalcaratus combines the Latin bi meaning "two" and calcaris meaning "spur". [5] The species is now placed in the genus Pternistis that was introduced by the German naturalist Johann Georg Wagler in 1832. [6] [7] A phylogenetic study published in 2019 found that the double-spurred spurfowl is sister to Heuglin's spurfowl. [8]
Three subspecies are now recognised: [7]
The double-spurred spurfowl is 30–34 cm (12–13 in) in length. [9] The male is mainly brown, sparingly streaked and spotted darker and cream above, chest and flank feathers are dark brown edged and centrally spotted cream. The face is pale cream finely flecked with dark brown, and the head features a chestnut crown and white supercilium. It has a chestnut neck collar, white cheek patches and brown wings. The male usually has two spurs on each leg, the upper one being blunt. The legs are dull green. The female is similar in appearance, but usually lacks spurs and is slightly smaller and less robustly built. Males weigh around 507 g (17.9 oz) and females around 381 g (13.4 oz). [9] Young birds are almost indistinguishable from adult females after the post juvenile moult at several weeks old, males take several months to develop any spurs. Breeding is unlikely until the birds are in their second year.
This bird is found in open habitats with trees. It nests in a lined ground scrape laying 5 to 7 eggs. The double-spurred spurfowl takes a wide variety of plant and insect food. This is a very unobtrusive species, best seen in spring when the male sings a mechanical krak-krak-krak from a mound. It has a pheasant's explosive flight, but prefers to creep away unseen.
The Phasianidae are a family of heavy, ground-living birds, which includes pheasants, partridges, junglefowl, chickens, turkeys, Old World quail, and peafowl. The family includes many of the most popular gamebirds. The family includes 185 species divided into 54 genera. It was formerly broken up into two subfamilies, the Phasianinae and the Perdicinae. However, this treatment is now known to be paraphyletic and polyphyletic, respectively, and more recent evidence supports breaking it up into two subfamilies: Rollulinae and Phasianinae, with the latter containing multiple tribes within two clades. The New World quail (Odontophoridae) and guineafowl (Numididae) were formerly sometimes included in this family, but are now typically placed in families of their own; conversely, grouse and turkeys, formerly often treated as distinct families, are now known to be deeply nested within Phasianidae, so they are now included in the present family.
Junglefowl are the only four living species of bird from the genus Gallus in the bird order Galliformes, and occur in parts of South and Southeast Asia. One of the species in this genus, the red junglefowl, is of historical importance as the direct ancestor of the domestic chicken, although the grey junglefowl, Sri Lankan junglefowl and green junglefowl are likely to have also been involved. The Sri Lankan junglefowl is the national bird of Sri Lanka. They diverged from their common ancestor about 4–6 million years ago. Although originating in Asia, remains of junglefowl bones have also been found in regions of Chile, which date back to 1321–1407 CE, providing evidence of possible Polynesian migration through the Pacific Ocean.
The red-necked spurfowl or red-necked francolin, is a gamebird in the pheasant family Phasianidae that is a resident species in southern Africa.
Hartlaub's spurfowl or Hartlaub's francolin is a species of bird in the pheasant family Phasianidae. It is endemic to the escarpment zone of Namibia and Angola. The common name and Latin binomial commemorate the German physician and ornithologist Gustav Hartlaub.
The handsome spurfowl is a species of bird in the pheasant family Phasianidae. It is a large, up to 35 cm long, terrestrial forest bird with a dark reddish brown plumage, grey head, red bill and legs, brown iris, bare red orbital skin and rufous grey below. Both sexes are similar. The female is slightly smaller than male. The young has duller plumage.
The Cape spurfowl or Cape francolin is a gamebird in the pheasant family Phasianidae. It is endemic to southern Africa, where it is the largest francolin. It occurs in the Western Cape province of South Africa, and locally northwards to southern Namibia. It has adapted to alien vegetation and a variety of human-altered habitats, but scrubby roosting and nesting space is a prerequisite. The species is not threatened.
The blue-naped parrot, also known as the blue-crowned green parrot, Luzon parrot, the Philippine green parrot, and locally known as pikoy, is a parrot found throughout the Philippines.
The red-billed spurfowl, also known as the red-billed francolin, is a species of bird in the family Phasianidae. It is found in Southern Africa, including Angola, Botswana, Namibia, South Africa, Zambia, and Zimbabwe.
The Ahanta francolin or Ahanta spurfowl is a species of bird in the pheasant family, Phasianidae. It is native to western Africa, where it occurs in Benin, Ivory Coast, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Nigeria, Senegal, Sierra Leone, and Togo.
The Mount Cameroon spurfowl is a bird species in the pheasant family Phasianidae. It is found only in Cameroon.
Clapperton's spurfowl is a species of bird in the family Phasianidae. It is found in Cameroon, Central African Republic, Chad, Eritrea, Ethiopia, Mali, Mauritania, Niger, Nigeria, Sudan, and Uganda.
Erckel's spurfowl, also known as Erckel's francolin, is a species of game bird in the family Phasianidae.
Hildebrandt's spurfowl is a species of bird in the family Phasianidae. It is found in Burundi, Democratic Republic of the Congo, Kenya, Malawi, Mozambique, Rwanda, Tanzania, and Zambia. The species is named for Johann Maria Hildebrandt, who collected the first specimens in Kenya. The sexes differ markedly in their plumage and females are smaller than males.
Heuglin's spurfowl is a species of bird in the family Phasianidae. It is found in Central African Republic, Democratic Republic of the Congo, South Sudan, and Uganda. The German explorer Theodor von Heuglin first described the species.
Jackson's spurfowl or Jackson's francolin is a species of bird in the family Phasianidae. It is found in Kenya and Uganda. Its preferred habitats include mountainous forests and stands of bamboo.
The yellow-necked spurfowl or yellow-necked francolin is a species of bird in the family Phasianidae. It is found in Djibouti, Eritrea, Ethiopia, Kenya, Somalia, Sudan, Tanzania, and Uganda. This species is named for the yellow patch found on its neck. Males of this species have been noted to have spurs on the back of their legs.
The Natal spurfowl or Natal francolin is a species of bird in the family Phasianidae. It is found in Botswana, Eswatini, Mozambique, South Africa, Zambia, and Zimbabwe.
The grey-breasted spurfowl or grey-breasted francolin is a species of bird in the family Phasianidae. It is found only in Tanzania.
The scaly spurfowl is a species of bird in the family Phasianidae. It is found in Angola, Burundi, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Ethiopia, Gabon, Kenya, Malawi, Nigeria, Rwanda, São Tomé and Príncipe, Sudan, Tanzania, and Uganda.
Pternistis is a genus of galliform birds formerly classified in the spurfowl group of the partridge subfamily of the pheasant family. They are described as "partridge-francolins" in literature establishing their phylogenetic placement outside the monophyletic assemblage of true spurfowls. All species are endemic to Sub-Saharan Africa, excepted the double-spurred spurfowl. They are commonly known as spurfowls or francolins, but are closely related to jungle bush quail, Alectoris rock partridges, and Coturnix quail. The species are strictly monogamous, remaining mated indefinitely. They procure most of their food by digging. Spurfowls subsist almost entirely on roots, beans of leguminous shrubs and trees, tubers, and seeds, and feasting opportunistically on termites, ants, locusts, flowers, and fruit. Important predators are jackals, caracals, servals, and birds of prey, as well as herons and marabou storks.