African Stonechat
Encyclopedia
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of the Old World flycatcher
Old World flycatcher
The Old World flycatcher family Muscicapidae is a large family of small passerine birds mostly restricted to the Old World. These are mainly small arboreal insectivores, many of which, as the name implies, take their prey on the wing.-Characteristics:...
family (Muscicapidae), inhabiting sub-Saharan Africa
Sub-Saharan Africa
Sub-Saharan Africa as a geographical term refers to the area of the African continent which lies south of the Sahara. A political definition of Sub-Saharan Africa, instead, covers all African countries which are fully or partially located south of the Sahara...
and adjacent regions. Like the other chat
Chat (bird)
Chats are a group of small Old World insectivorous birds formerly classed as members of the thrush family Turdidae, but now considered Old World flycatchers....
s, it was long assigned to the thrush family (Turdidae), to which the chats are convergent
Convergent evolution
Convergent evolution describes the acquisition of the same biological trait in unrelated lineages.The wing is a classic example of convergent evolution in action. Although their last common ancestor did not have wings, both birds and bats do, and are capable of powered flight. The wings are...
. Its scientific name refer to its appearance and habitat
Habitat
* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...
and means "collared rock-dweller": Saxicola from Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...
saxum ("rock") + incola ("one who dwells in a place"), torquatus, Latin for "collared
Collar (clothing)
In clothing, a collar is the part of a shirt, dress, coat or blouse that fastens around or frames the neck. Among clothing construction professionals, a collar is differentiated from other necklines such as revers and lapels, by being made from a separate piece of fabric, rather than a folded or...
".
In the past S. torquatus usually referred to the entire "Common Stonechat
Common Stonechat
Common Stonechat is the name used for the Saxicola species Saxicola torquatus when this is treated in its broad sense.It is however now more widely considered to be a superspecies consisting of several related but distinct species, which are outwardly fairly similar but genetically distinct and...
" superspecies
Superspecies
A superspecies is a group of at least two more or less distinctive species with approximately parapatric distributions. Not all species complexes, whether cryptices or ring species are superspecies, and vice versa, but many are...
and some sources still keep it that way, but all available evidence strongly supports full species status for the European
European Stonechat
The European Stonechat is a small passerine bird that was formerly classed as a subspecies of the Common Stonechat. Long considered a member of the thrush family Turdidae, genetic evidence has placed it and its relatives in the Old World flycatcher family Muscicapidae.It is 11.5–13 cm long and...
(S. rubicola) and the Siberian Stonechat
Siberian Stonechat
The Siberian Stonechat or Asian Stonechat is a recently-validated species of the Old World flycatcher family . Like the other thrush-like flycatchers, it was often placed in the Turdidae in the past...
(S. maurus) of temperate
Temperate
In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally relatively moderate, rather than extreme hot or cold...
Eurasia
Eurasia
Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...
, in addition to the island-endemics Fuerteventura Chat
Fuerteventura Chat
The Canary Islands Stonechat , also known as the Fuerteventura Stonechat or Fuerteventura Chat, and formerly known as the Canary Islands Chat due to its once widespread distribution on the Canary Islands...
(S. dacotiae) and Réunion Stonechat
Reunion Stonechat
The Reunion Stonechat is a species of stonechat, endemic to the island of Réunion. This small passerine bird is common in clearings and open mountain bushlands there. Overall, the male is black above and white below, but also with a white supercilium , half-collar, and greater covert patch, and a...
(S. tectes) which were never unequivocally accepted into S. torquata. Also, the well-marked populations of the Horn of Africa
Horn of Africa
The Horn of Africa is a peninsula in East Africa that juts hundreds of kilometers into the Arabian Sea and lies along the southern side of the Gulf of Aden. It is the easternmost projection of the African continent...
uplands (and Arabia?) and Madagascar
Madagascar
The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...
(and Grande Comore
Grande Comore
Grande Comore is an island in the Indian Ocean off the coast of Africa. It is the largest island in the Comoros nation. Most of its population is of the Comorian ethnic group. Its population as of 2006 is about 316,600. The island's capital is Moroni, which is also the national capital...
?) may well qualify as yet additional species.
Description and distribution
The males have a black head, a white half-collar, a black back, a white rump, and a black tail; the wings are black with a large white patch on the top side of the inner wing. The upper breast is usually dark orange-red, with a sharp or gradual transition to white or pale orange on the lower breast and belly depending on subspeciesSubspecies
Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...
. In a few, black replaces the orange breast feathers in part or entirely.
Females have brown rather than black above and on the head with an indistinct paler eyebrow line, chestnut-buff rather than orange below, and less white on the wings. Both sexes' plumage is somewhat duller and streakier outside the breeding season.
It has a scattered distribution across much of sub-Saharan Africa
Sub-Saharan Africa
Sub-Saharan Africa as a geographical term refers to the area of the African continent which lies south of the Sahara. A political definition of Sub-Saharan Africa, instead, covers all African countries which are fully or partially located south of the Sahara...
, occurring locally as far north as Senegal
Senegal
Senegal , officially the Republic of Senegal , is a country in western Africa. It owes its name to the Sénégal River that borders it to the east and north...
and Ethiopia
Ethiopia
Ethiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...
. Outlying populations are found the mountains of southwest Arabia
Arabian Peninsula
The Arabian Peninsula is a land mass situated north-east of Africa. Also known as Arabia or the Arabian subcontinent, it is the world's largest peninsula and covers 3,237,500 km2...
and on Madagascar
Madagascar
The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...
and Grande Comore
Grande Comore
Grande Comore is an island in the Indian Ocean off the coast of Africa. It is the largest island in the Comoros nation. Most of its population is of the Comorian ethnic group. Its population as of 2006 is about 316,600. The island's capital is Moroni, which is also the national capital...
. It is non-migratory, moving only locally if at all. As a result, it has developed much regional variation, being divided into about 15 subspecies
Subspecies
Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...
.
Systematics and taxonomy
The closest relative of this species are apparently not the EurasiaEurasia
Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...
n populations but the Réunion Stonechat
Reunion Stonechat
The Reunion Stonechat is a species of stonechat, endemic to the island of Réunion. This small passerine bird is common in clearings and open mountain bushlands there. Overall, the male is black above and white below, but also with a white supercilium , half-collar, and greater covert patch, and a...
(S. tectes), but still the "white-collared" Saxicola form a distinct group in the genus. S. torquatus and S. tectes form a sub-Saharan Africa
Sub-Saharan Africa
Sub-Saharan Africa as a geographical term refers to the area of the African continent which lies south of the Sahara. A political definition of Sub-Saharan Africa, instead, covers all African countries which are fully or partially located south of the Sahara...
n lineage that diverged from the Eurasian one in the Late Pliocene, roughly 2.5 million years ago. Réunion was colonized shortly thereafter, indicating a rapid expansion along the Indian Ocean
Indian Ocean
The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...
coast of Africa. With the Sahara
Sahara
The Sahara is the world's second largest desert, after Antarctica. At over , it covers most of Northern Africa, making it almost as large as Europe or the United States. The Sahara stretches from the Red Sea, including parts of the Mediterranean coasts, to the outskirts of the Atlantic Ocean...
drying out in the subsequent Quaternary glaciation
Quaternary glaciation
Quaternary glaciation, also known as the Pleistocene glaciation, the current ice age or simply the ice age, refers to the period of the last few million years in which permanent ice sheets were established in Antarctica and perhaps Greenland, and fluctuating ice sheets have occurred elsewhere...
, the African and Eurasian populations became isolated for good.
The recent separation as species was proposed after mtDNA cytochrome b
Cytochrome b
Cytochrome b/b6 is the main subunit of transmembrane cytochrome bc1 and b6f complexes. In addition, it commonly refers to a region of mtDNA used for population genetics and phylogenetics.- Function :...
sequence
DNA sequence
The sequence or primary structure of a nucleic acid is the composition of atoms that make up the nucleic acid and the chemical bonds that bond those atoms. Because nucleic acids, such as DNA and RNA, are unbranched polymers, this specification is equivalent to specifying the sequence of...
and nDNA microsatellite fingerprinting analysis of specimens of the subspecies Saxicola torquatus axillaris but not S. t. torquatus, and hence this species was briefly known as S. axillaris.
Subspecies
The subspecies differ slightly in size, and more in the extent of the orange-red on the upper breast of the males, and whether the lower breast is white with a distinct boundary from the upper breast, or pale orange with an indistinct boundary from the darker upper breast. The extent of the orange-red also varies with time of year, often extending on to the belly outside the breeding season.- Saxicola torquatus torquatus (Linnaeus, 1766) – E South AfricaSouth AfricaThe Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
- Saxicola (torquatus) sibilla (Linnaeus, 1766), Madagascar Stonechat – MadagascarMadagascarThe Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...
- Saxicola (torquatus) albofasciatus (Rüppell, 1845), Ethiopian Stonechat – EthiopiaEthiopiaEthiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...
n highlands
- Upper breast black, not orange-red.
- Saxicola torquatus salax (J. & E.Verreaux, 1851) – N AngolaAngolaAngola, officially the Republic of Angola , is a country in south-central Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean with Luanda as its capital city...
, W ZaireZaireThe Republic of Zaire was the name of the present Democratic Republic of the Congo between 27 October 1971 and 17 May 1997. The name of Zaire derives from the , itself an adaptation of the Kongo word nzere or nzadi, or "the river that swallows all rivers".-Self-proclaimed Father of the Nation:In...
, CongoCongo BasinThe Congo Basin is the sedimentary basin that is the drainage of the Congo River of west equatorial Africa. The basin begins in the highlands of the East African Rift system with input from the Chambeshi River, the Uele and Ubangi Rivers in the upper reaches and the Lualaba River draining wetlands...
, GabonGabonGabon , officially the Gabonese Republic is a state in west central Africa sharing borders with Equatorial Guinea to the northwest, Cameroon to the north, and with the Republic of the Congo curving around the east and south. The Gulf of Guinea, an arm of the Atlantic Ocean is to the west... - Saxicola torquatus axillaris (Shelley, 1884) – KenyaKenyaKenya , officially known as the Republic of Kenya, is a country in East Africa that lies on the equator, with the Indian Ocean to its south-east...
, UgandaUgandaUganda , officially the Republic of Uganda, is a landlocked country in East Africa. Uganda is also known as the "Pearl of Africa". It is bordered on the east by Kenya, on the north by South Sudan, on the west by the Democratic Republic of the Congo, on the southwest by Rwanda, and on the south by...
, NW TanzaniaTanzaniaThe United Republic of Tanzania is a country in East Africa bordered by Kenya and Uganda to the north, Rwanda, Burundi, and the Democratic Republic of the Congo to the west, and Zambia, Malawi, and Mozambique to the south. The country's eastern borders lie on the Indian Ocean.Tanzania is a state...
, RwandaRwandaRwanda or , officially the Republic of Rwanda , is a country in central and eastern Africa with a population of approximately 11.4 million . Rwanda is located a few degrees south of the Equator, and is bordered by Uganda, Tanzania, Burundi and the Democratic Republic of the Congo...
, BurundiBurundiBurundi , officially the Republic of Burundi , is a landlocked country in the Great Lakes region of Eastern Africa bordered by Rwanda to the north, Tanzania to the east and south, and the Democratic Republic of the Congo to the west. Its capital is Bujumbura...
, E Zaire - Saxicola torquatus pallidigula (Reichenow, 1892) – High altitudes on Mount CameroonMount CameroonMount Cameroon is an active volcano in Cameroon near the Gulf of Guinea. Mount Cameroon is also known as Cameroon Mountain or Fako or by its native name Mongo ma Ndemi ....
, CameroonCameroonCameroon, officially the Republic of Cameroon , is a country in west Central Africa. It is bordered by Nigeria to the west; Chad to the northeast; the Central African Republic to the east; and Equatorial Guinea, Gabon, and the Republic of the Congo to the south. Cameroon's coastline lies on the...
- Saxicola torquatus salax (J. & E.Verreaux, 1851) – N Angola
- The largest subspecies. Length of flattened wing c.75-78 mm (3 in).
- Saxicola torquatus jebelmarrae Lynes, 1920 – DarfurDarfurDarfur is a region in western Sudan. An independent sultanate for several hundred years, it was incorporated into Sudan by Anglo-Egyptian forces in 1916. The region is divided into three federal states: West Darfur, South Darfur, and North Darfur...
(SudanSudanSudan , officially the Republic of the Sudan , is a country in North Africa, sometimes considered part of the Middle East politically. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the...
) - Saxicola torquatus adamauae Grote, 1922 – Cameroon
- Saxicola torquatus jebelmarrae Lynes, 1920 – Darfur
- Mid-sized, length of flattened wing c.70 mm (c.2.7 in).
- Saxicola torquatus promiscuus Hartert, 1922 – Western MozambiqueMozambiqueMozambique, officially the Republic of Mozambique , is a country in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest...
, eastern ZambiaZambiaZambia , officially the Republic of Zambia, is a landlocked country in Southern Africa. The neighbouring countries are the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west....
, central Tanzania
- Saxicola torquatus promiscuus Hartert, 1922 – Western Mozambique
- Very limited orange-red on uppermost part of breast only.
- Saxicola torquatus voeltzkowi Grote, 1926 – Grande ComoreGrande ComoreGrande Comore is an island in the Indian Ocean off the coast of Africa. It is the largest island in the Comoros nation. Most of its population is of the Comorian ethnic group. Its population as of 2006 is about 316,600. The island's capital is Moroni, which is also the national capital...
- Saxicola torquatus nebularum Bates, 1930 – Tropical West AfricaWest AfricaWest Africa or Western Africa is the westernmost region of the African continent. Geopolitically, the UN definition of Western Africa includes the following 16 countries and an area of approximately 5 million square km:-Flags of West Africa:...
from Sierra LeoneSierra LeoneSierra Leone , officially the Republic of Sierra Leone, is a country in West Africa. It is bordered by Guinea to the north and east, Liberia to the southeast, and the Atlantic Ocean to the west and southwest. Sierra Leone covers a total area of and has an estimated population between 5.4 and 6.4...
to Côte d'IvoireCôte d'IvoireThe Republic of Côte d'Ivoire or Ivory Coast is a country in West Africa. It has an area of , and borders the countries Liberia, Guinea, Mali, Burkina Faso and Ghana; its southern boundary is along the Gulf of Guinea. The country's population was 15,366,672 in 1998 and was estimated to be...
- Saxicola torquatus voeltzkowi Grote, 1926 – Grande Comore
- Extensive orange-red on breast and also flanks.
- Saxicola torquatus moptanus Bates, 1932 – Scattered in the W SahelSahelThe Sahel is the ecoclimatic and biogeographic zone of transition between the Sahara desert in the North and the Sudanian Savannas in the south.It stretches across the North African continent between the Atlantic Ocean and the Red Sea....
from N SenegalSenegalSenegal , officially the Republic of Senegal , is a country in western Africa. It owes its name to the Sénégal River that borders it to the east and north...
to NigerNigerNiger , officially named the Republic of Niger, is a landlocked country in Western Africa, named after the Niger River. It borders Nigeria and Benin to the south, Burkina Faso and Mali to the west, Algeria and Libya to the north and Chad to the east...
- Saxicola torquatus moptanus Bates, 1932 – Scattered in the W Sahel
- The smallest subspecies.
- Saxicola torquatus felix Bates, 1936 – SW Saudi ArabiaSaudi ArabiaThe Kingdom of Saudi Arabia , commonly known in British English as Saudi Arabia and in Arabic as as-Sa‘ūdiyyah , is the largest state in Western Asia by land area, constituting the bulk of the Arabian Peninsula, and the second-largest in the Arab World...
and W YemenYemenThe Republic of Yemen , commonly known as Yemen , is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east.... - Saxicola torquatus oreobates Clancey, 1956 – High altitudes in the DrakensbergDrakensbergThe Drakensberg is the highest mountain range in Southern Africa, rising to in height. In Zulu, it is referred to as uKhahlamba , and in Sesotho as Maluti...
and other mountains of LesothoLesothoLesotho , officially the Kingdom of Lesotho, is a landlocked country and enclave, surrounded by the Republic of South Africa. It is just over in size with a population of approximately 2,067,000. Its capital and largest city is Maseru. Lesotho is a member of the Commonwealth of Nations. The name...
and immediately adjacent South Africa - Saxicola torquatus stonei Bowen, 1932 – C southern AfricaSouthern AfricaSouthern Africa is the southernmost region of the African continent, variably defined by geography or geopolitics. Within the region are numerous territories, including the Republic of South Africa ; nowadays, the simpler term South Africa is generally reserved for the country in English.-UN...
, from northernmost South Africa north to Zaire and southwestern Tanzania - Saxicola torquatus clanceyi Latimer, 1961 – W South Africa
- Saxicola torquatus altivagus Clancey, 1988 – E ZimbabweZimbabweZimbabwe is a landlocked country located in the southern part of the African continent, between the Zambezi and Limpopo rivers. It is bordered by South Africa to the south, Botswana to the southwest, Zambia and a tip of Namibia to the northwest and Mozambique to the east. Zimbabwe has three...
, Mozambique, MalawiMalawiThe Republic of Malawi is a landlocked country in southeast Africa that was formerly known as Nyasaland. It is bordered by Zambia to the northwest, Tanzania to the northeast, and Mozambique on the east, south and west. The country is separated from Tanzania and Mozambique by Lake Malawi. Its size...
- Saxicola torquatus felix Bates, 1936 – SW Saudi Arabia
- Previously included within promiscua, and very similar to it.