The Cape vulture (''Gyps coprotheres''), also known as Cape griffon and Kolbe's vulture, is an

Old World vulture Old World vultures are vultures that are found in the Old World, i.e. the continents of Europe, Asia and Africa, and which belong to the family Accipitridae, which also includes eagles, buzzards, kites, and hawks. Old World vultures are not ...

in the family

Accipitridae The Accipitridae () is one of the four families within the order Accipitriformes, and is a family of small to large birds of prey with strongly hooked bills and variable morphology based on diet. They feed on a range of prey items from insects ...

. It is endemic to

southern Africa Southern Africa is the southernmost region of Africa. No definition is agreed upon, but some groupings include the United Nations geoscheme for Africa, United Nations geoscheme, the intergovernmental Southern African Development Community, and ...

, and lives mainly in

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

Lesotho Lesotho, formally the Kingdom of Lesotho and formerly known as Basutoland, is a landlocked country in Southern Africa. Entirely surrounded by South Africa, it is the largest of only three sovereign enclave and exclave, enclaves in the world, t ...

Botswana Botswana, officially the Republic of Botswana, is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory part of the Kalahari Desert. It is bordered by South Africa to the sou ...

, and in some parts of northern

Namibia Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no ...

. It nests on cliffs and lays one egg per year. In 2015, it had been classified as

Endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological ...

, but was down-listed to Vulnerable in 2021 as some populations increased and have been stable since about 2016.

Description

This large vulture is of a creamy-buff colour, with contrasting dark flight and tail feathers. The adult is paler than the juvenile, and its underwing coverts can appear almost white at a distance. The head and neck are near-naked. The eyes are yellowish, and the bill is black. Juveniles and immatures are generally darker and more streaked, with brown to orange eyes and red necks. It closely resembles the white-backed vulture, however it is larger and has yellow irises. The average length of adult vultures is about with a wingspan of and a body weight of . The two prominent bare skin patches at the base of the neck, also found in the white-backed vulture, are thought to be temperature sensors and used for detecting the presence of

thermal A thermal column (or thermal) is a rising mass of buoyant air, a convective current in the atmosphere, that transfers heat energy vertically. Thermals are created by the uneven heating of Earth's surface from solar radiation, and are an example ...

s. The species is among the largest raptors in

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

, next to the lappet-faced vulture. With a mean body mass of roughly , it appears to be significantly heavier than wild lappet-faced vultures, despite the latter's extremely large appearance, and rivals only a few other species, namely the

great white pelican The great white pelican (''Pelecanus onocrotalus'') also known as the eastern white pelican, rosy pelican or simply white pelican is a bird in the pelican family. It breeds from southeastern Europe through Asia and Africa, in swamps and shallow ...

and kori bustard, as the largest flying bird native to Africa.Mendelsohn, J.M., Kemp, A.C., Biggs, H.C., Biggs, R., & Brown, C.J. (1989). ''Wing areas, wing loadings and wing spans of 66 species of African raptors''. Ostrich, 60(1), 35-42. After the Himalayan griffon vulture and the

cinereous vulture The cinereous vulture (''Aegypius monachus''), also known as the black vulture, Eurasian black vulture, and monk vulture, is a very large Raptor (bird), raptor in the family Accipitridae distributed through much of temperate Eurasia. With a body ...

, the Cape vulture is the third largest

on average.

Distribution and habitat

The Cape vulture is resident and breeding in Botswana, Lesotho,

Mozambique Mozambique, officially the Republic of Mozambique, is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Afr ...

and

, but is

vagrant Vagrancy is the condition of wandering homelessness without regular employment or income. Vagrants usually live in poverty and support themselves by travelling while engaging in begging, scavenging, or petty theft. In Western countries, ...

in the

Democratic Republic of the Congo The Democratic Republic of the Congo (DRC), also known as the DR Congo, Congo-Kinshasa, or simply the Congo (the last ambiguously also referring to the neighbouring Republic of the Congo), is a country in Central Africa. By land area, it is t ...

and

Zambia Zambia, officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa. It is typically referred to being in South-Central Africa or Southern Africa. It is bor ...

. It also occurs in

Angola Angola, officially the Republic of Angola, is a country on the west-Central Africa, central coast of Southern Africa. It is the second-largest Portuguese-speaking world, Portuguese-speaking (Lusophone) country in both total area and List of c ...

Zimbabwe file:Zimbabwe, relief map.jpg, upright=1.22, Zimbabwe, relief map Zimbabwe, officially the Republic of Zimbabwe, is a landlocked country in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Bots ...

and

Eswatini Eswatini, formally the Kingdom of Eswatini, also known by its former official names Swaziland and the Kingdom of Swaziland, is a landlocked country in Southern Africa. It is bordered by South Africa on all sides except the northeast, where i ...

but does not breed there. They are obligate scavengers, they feed on

carrion Carrion (), also known as a carcass, is the decaying flesh of dead animals. Overview Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters (or scavengers) include crows, vultures ...

, eating soft muscles and organ tissues and some bone fragments. They search for food in groups, they can spot the carcasses from a long distance meaning that they have good eyesight. They are able to locate the carcass quicker than other ground-dwelling scavengers.

Behaviour and ecology

Breeding

It usually breeds and roosts on

cliff In geography and geology, a cliff or rock face is an area of Rock (geology), rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. ...

faces in or near mountains, and has been recorded up to an elevation of . In South Africa's

Eastern Cape The Eastern Cape ( ; ) is one of the nine provinces of South Africa. Its capital is Bhisho, and its largest city is Gqeberha (Port Elizabeth). Due to its climate and nineteenth-century towns, it is a common location for tourists. It is also kno ...

, Cape vultures were more likely to use nest sites on ledges with a smaller depth and at a higher elevation, surrounded by conspecifics. Tracked individuals in Namibia had

home range A home range is the area in which an animal lives and moves on a periodic basis. It is related to the concept of an animal's territory which is the area that is actively defended. The concept of a home range was introduced by W. H. Burt in 1943. ...

s of . They also roost on trees and pylons. Additionally, juveniles and adults both prefer to roost on cliffs located closer to colonies. It is also believed that they tend to remain or return to the area of birth for breeding. In Colleywobbles Vulture Colony in the Eastern Cape, South Africa, the fledglings had a mean post-fledging dependency period of 101 days, and the distance from the nest increased after this period, as the fledglings gained independence from their parents. Though they continue to breed, some populations have been recorded to have declined. Roberts’ Farm in Magaliesberg, was abandoned as a breeding site in 2013.

Conservation and threats

The Cape vulture has been declining steadily since at least the 1980s, when it was first categorised as Threatened. Between 1992 and 2007 the species declined by 60-70% in South Africa alone. By 2021, the total population size was estimated about 9,600 to 12,800 mature individuals, and it was assessed as Vulnerable. The Cape vulture is considered to be impacted by a number of threats. A decrease in the amount of large carrion particularly during nesting, targeted or inadvertent poisoning, loss of foraging habitat, and unsustainable harvesting for traditional uses are thought to be the most important factors. A source of poisoning specific to many vultures, including the Cape vulture, is the drug ''

Diclofenac Diclofenac, sold under the brand name Voltaren among others, is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and inflammatory diseases such as gout. It can be taken orally (swallowed by mouth), inserted rectally as a ...

'' and related compounds, which is used to treat arthritis in cattle, and which lead to kidney failure in vultures who consume carcasses of treated cattle. Electrocution resulting from collision with cables on electricity pylons is the most common cause of death in ringed birds. On the 20th of June 2019, the carcasses of 468 white-backed vultures, 17 white-headed vultures, 28 hooded vultures, 14 lappet-faced vultures and 10 cape vultures, altogether 537 vultures, besides 2 tawny eagles, were found in northern Botswana. It is suspected that they died after eating the carcasses of 3

elephant Elephants are the largest living land animals. Three living species are currently recognised: the African bush elephant ('' Loxodonta africana''), the African forest elephant (''L. cyclotis''), and the Asian elephant ('' Elephas maximus ...

s that were poisoned by

poachers Poaching is the illegal hunting or capturing of wild animals, usually associated with land use rights. Poaching was once performed by impoverished peasants for subsistence purposes and to supplement meager diets. It was set against the hunti ...

, possibly to avoid detection by the birds, which help rangers to track poaching activity by circling above where there are dead animals.

Climate change Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in ...

has contributed as a threat for the endemic species, populations have decreased due to the high temperatures and global warming. There is still need to alter laws to achieve great conservation, as most laws in South Africa are implemented at a provincial scale. All vulture species can be elevated to 'Specially Protected' status to help increase their populations.

Human wildlife conflict

There is still a need to deal with human-wildlife conflicts, farmers still need to be made aware of the effects of poisoning. In Namibia, 1.7% of communal farmers admitted to using poison in the year 2015. In Kenya, over 20% of farmers used poisons to eliminate predators and they were not aware of the Kenya Wildlife Act. It was then suggested that awareness campaigns should be implemented to reduce poisoning. In addition, a combination of top-down, e.g. legislation, and bottom-up such as corrals or compensation is expected to help reduce the problem.

References

External links

BirdLife Species Factsheet.
* Cape vulture
Species text in The Atlas of Southern African Birds

Cape Griffon
{{Taxonbar, from=Q826525

Cape vulture The Cape vulture (''Gyps coprotheres''), also known as Cape griffon and Kolbe's vulture, is an Old World vulture in the family Accipitridae. It is endemic to southern Africa, and lives mainly in South Africa, Lesotho, Botswana, and in some parts ...

Birds of Southern Africa Birds of prey of Sub-Saharan Africa