Cape vulture

Last updated

Cape vulture
Cape Vulture-001.jpg
A flying cape vulture at the Rhino and Lion Nature Reserve in Cradle of Humankind, Gauteng, South Africa
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Genus: Gyps
Species:
G. coprotheres
Binomial name
Gyps coprotheres
(Forster, 1798) [2]
Synonyms

Gyps kolbii

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 of northern Namibia. It nests on cliffs and lays one egg per year. In 2015, it had been classified as Endangered on the IUCN Red List, but was down-listed to Vulnerable in 2021 as some populations increased and have been stable since about 2016. [1]

Contents

Description

At Giant's Castle, KwaZulu-Natal Drakensberg, South Africa Cape Vulture - Giant Castle - South-Africa 010002 (15444476446).jpg
At Giant's Castle, KwaZulu-Natal Drakensberg, South Africa
Illustration of a Cape vulture skeleton (1904) Das thierleben in Schonbrunn (1904) (20831086742).jpg
Illustration of a Cape vulture skeleton (1904)

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. [1] It closely resembles the white-backed vulture, however it is larger and has yellow irises. [3]

The average length of adult vultures is about 96–115 cm (38–45 in) with a wingspan of 2.26–2.6 m (7 ft 5 in – 8 ft 6 in) and a body weight of 7–11 kg (15–24 lb). 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 thermals. The species is among the largest raptors in Africa, next to the lappet-faced vulture. With a mean body mass of roughly 8.9 to 9.22 kg (19.6 to 20.3 lb), 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 and kori bustard, as the largest flying bird native to Africa. [4] [5] [6] After the Himalayan griffon vulture and the cinereous vulture, the Cape vulture is the third largest Old World vulture on average. [7] [8]

Distribution and habitat

Egg Vautour chassefiente MHNT.jpg
Egg

The Cape vulture is resident and breeding in Botswana, Lesotho, Mozambique and South Africa, but is vagrant in the Democratic Republic of the Congo and Zambia. It also occurs in Angola, Namibia, Zimbabwe and Eswatini but does not breed there. [1] They are obligate scavengers, they feed on carrion, 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. [9]

Behaviour and ecology

Breeding

It usually breeds and roosts on cliff faces in or near mountains, [10] and has been recorded up to an elevation of 3,100 m (10,200 ft). [1] In South Africa's Eastern Cape, Cape vultures were more likely to use nest sites on ledges with a smaller depth and at a higher elevation, surrounded by conspecifics. [11] Tracked individuals in Namibia had home ranges of 11,800–22,500 km2 (4,600–8,700 sq mi). [12] They also roost on trees and pylons. Additionally, juveniles and adults both prefer to roost on cliffs located closer to colonies. [13] It is also believed that they tend to remain or return to the area of birth for breeding. [14]

In Colleywobbles Vulture Colony in Eastern Cape Province, 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. [15] 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. [16]

Conservation and threats

Cape vulture at De Wildt Cheetah and Wildlife Centre (Breeding program in South Africa) Cape vulture at De Wildt Cheetah Research Centre (South Africa).jpg
Cape vulture at De Wildt Cheetah and Wildlife Centre (Breeding program in South Africa)

The Cape vulture has been declining steadily since at least the 1980s, when it was first categorized as Threatened. Between 1992 and 2007 the species declined by 60-70% in South Africa alone. [1] By 2021, the total population size was estimated about 9,600 to 12,800 mature individuals, and it was assessed as Vulnerable. [1]

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 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. [1] Electrocution resulting from collision with cables on electricity pylons is the most common cause of death in ringed birds. [12]

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 elephants that were poisoned by poachers, possibly to avoid detection by the birds, which help rangers to track poaching activity by circling above where there are dead animals. [17] [18] [19] [20] Climate change has contributed as a threat for the endemic species, populations have decreased due to the high temperatures and global warming. [21] 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. [22]

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. [23] 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. [24]

Related Research Articles

<span class="mw-page-title-main">Vulture</span> Common name for a type of bird

A vulture is a bird of prey that scavenges on carrion. There are 23 extant species of vulture. Old World vultures include 16 living species native to Europe, Africa, and Asia; New World vultures are restricted to North and South America and consist of seven identified species, all belonging to the Cathartidae family. A particular characteristic of many vultures is a bald, unfeathered head. This bare skin is thought to keep the head clean when feeding, and also plays an important role in thermoregulation.

<span class="mw-page-title-main">Eurasian griffon vulture</span> Species of bird

The Eurasian griffon vulture is a large Old World vulture in the bird of prey family Accipitridae. It may also be known as the Griffon vulture, though it may be used for the genus as a whole. It is not to be confused with the Rüppell's griffon vulture and Himalayan griffon vulture. It is closely related to the white-backed vulture.

<span class="mw-page-title-main">Himalayan vulture</span> Species of bird

The Himalayan vulture or Himalayan griffon vulture is an Old World vulture native to the Himalayas and the adjoining Tibetan Plateau. It is one of the two largest Old World vultures and true raptors. It is listed as Near Threatened on the IUCN Red List. It is not to be confused with the Eurasian griffon vulture, which is a similar and sympatric species.

<span class="mw-page-title-main">White-rumped vulture</span> Species of bird

The white-rumped vulture is an Old World vulture native to South and Southeast Asia. It has been listed as Critically Endangered on the IUCN Red List since 2000, as the population severely declined. White-rumped vultures die of kidney failure caused by diclofenac poisoning. In the 1980s, the global population was estimated at several million individuals, and it was thought to be "the most abundant large bird of prey in the world". As of 2021, the global population was estimated at less than 6,000 mature individuals.

<span class="mw-page-title-main">Indian vulture</span> Species of vulture

The Indian vulture or long-billed vulture is a bird of prey native to the Indian subcontinent. It is an Old World vulture belonging to the family of Accipitridae. It is a medium-sized vulture with a small, semi-bald head with little feathers, long beak, and wide dark colored wings. It breeds mainly on small cliffs and hilly crags in central and peninsular India.

<span class="mw-page-title-main">Hooded vulture</span> Species of bird

The hooded vulture is an Old World vulture in the order Accipitriformes, which also includes eagles, kites, buzzards and hawks. It is the only member of the genus Necrosyrtes, which is sister to the larger Gyps genus, both of which are a part of the Aegypiinae subfamily of Old World vultures. It is native to sub-Saharan Africa, where it has a widespread distribution with populations in southern, East and West Africa. It is a scruffy-looking, small vulture with dark brown plumage, a long thin bill, bare crown, face and fore-neck, and a downy nape and hind-neck. Its face is usually a light red colour. It typically scavenges on carcasses of wildlife and domestic animals. Although it remains a common species with a stable population in the lower region of Casamance, some areas of The Gambia, and Guinea-Bissau, other regions such as Dakar, Senegal, show more than 85% losses in population over the last 50 years. Threats include poisoning, hunting, loss of habitat and collisions with electricity infrastructure, and the International Union for Conservation of Nature has rated its conservation status as "critically endangered" in their latest assessment (2022). The highest current regional density of hooded vultures is in the western region of The Gambia.

<span class="mw-page-title-main">Lappet-faced vulture</span> Species of bird

The lappet-faced vulture or Nubian vulture is an Old World vulture belonging to the bird order Accipitriformes, which also includes eagles, kites, buzzards and hawks. It is the only member of the genus Torgos. It is not closely related to the superficially similar New World vultures, and does not share the good sense of smell of some members of that family of birds.

<span class="mw-page-title-main">Egyptian vulture</span> Species of Old World vultures of the genus Neophron

The Egyptian vulture, also called the white scavenger vulture or pharaoh's chicken, is a small Old World vulture and the only member of the genus Neophron. It is widely distributed from the Iberian Peninsula, North Africa, West Asia and India. The contrasting underwing pattern and wedge-shaped tail make it distinctive in flight as it soars in thermals during the warmer parts of the day. Egyptian vultures feed mainly on carrion but are opportunistic and will prey on small mammals, birds, and reptiles. They also feed on the eggs of other birds, breaking larger ones by tossing a large pebble onto them.

<span class="mw-page-title-main">White-backed vulture</span> Species of bird

The white-backed vulture is an Old World vulture in the family Accipitridae, which also includes eagles, kites, buzzards and hawks. It is the most common vulture species in the continent of Africa.

<span class="mw-page-title-main">Cinereous vulture</span> Species of bird

The cinereous vulture is a large raptor in the family Accipitridae and distributed through much of temperate Eurasia. It is also known as the black vulture, monk vulture and Eurasian black vulture. With a body length of 1.2 m, 3.1 m (10 ft) across the wings and a maximum weight of 14 kg (31 lb), it is the largest Old World vulture and largest member of the Accipitridae family.

<span class="mw-page-title-main">Rüppell's vulture</span> Species of bird

Rüppell's vulture, also called Rüppell's griffon vulture, named after Eduard Rüppell, is a large bird of prey, mainly native to the Sahel region and East Africa. The former population of 22,000 has been decreasing due to loss of habitat, incidental poisoning, and other factors. Known also as Rüppell's griffon, Rueppell's griffon, Rüppell's griffin vulture, Rueppell's vulture and other variants, it is not to be confused with a different species, the griffon vulture. Rüppell's vulture is considered to be the highest-flying bird, with confirmed evidence of a flight at an altitude of 11,300 m (37,000 ft) above sea level.

<span class="mw-page-title-main">Tawny eagle</span> Species of bird

The tawny eagle is a large bird of prey. Like all eagles, it belongs to the family Accipitridae. Its heavily feathered legs mark it as a member of the subfamily Aquilinae, also known as booted eagles. Tawny eagles have an extensive but discontinuous breeding range that constitutes much of the African continent as well as the Indian subcontinent, with rare residency in the southern Middle East. Throughout its range, it favours open dry habitats such as semideserts, deserts steppes, or savanna plains. Despite its preference for arid areas, the species seldom occurs in areas where trees are entirely absent. It is a resident breeder which lays one to three eggs in a stick nest most commonly in the crown of a tree. The tawny eagle is perhaps the most highly opportunistic of all Aquilinae, and often scavenges on carrion or engages in kleptoparasitism towards other carnivorous animals but is also a bold and active predator, often of relatively large and diverse prey. It is estimated that tawny eagles can reach the age of 16 years old. Nonetheless, precipitous declines have been detected throughout the tawny eagle's range. Numerous factors, particularly loss of nesting habitat due to logging and global warming, as well as persecution and other anthropogenic mortality are driving the once numerous tawny eagle perhaps to the brink of extinction.

<span class="mw-page-title-main">Bateleur</span> Species of bird

The bateleur is a medium-sized eagle in the family Accipitridae. It is often considered a relative of the snake eagles and, like them, it is classified within the subfamily Circaetinae. It is the only member of the genus Terathopius and may be the origin of the "Zimbabwe Bird", the national emblem of Zimbabwe. Adult bateleurs are generally black in colour with a chestnut colour on the mantle as well as also on the rump and tail. Adults also have gray patches about the leading edges of the wings with bright red on their cere and their feet. Adults also show white greater coverts, contrasting with black remiges in males, gray patches on the underwing primaries and black wingtips. The juvenile bateleur is quite different, being largely drab brown with a bit of paler feather scaling. All bateleurs have extremely large heads for their size, rather small bills, large feet, relatively short legs, long, bow-like wings and uniquely short tails, which are much smaller still on adults compared to juvenile birds.

<span class="mw-page-title-main">White-headed vulture</span> Species of bird

The white-headed vulture is an Old World vulture endemic to Africa. Populations have been declining steeply in recent years due to habitat degradation and poisoning of vultures at carcasses. An extinct relative was also present in the Indonesian island of Flores during the Late Pleistocene, indicating that the genus was more widespread in the past.

<span class="mw-page-title-main">Spanish Ornithological Society</span> Spanish ornithological conservation organization

The Spanish Ornithological Society is Spain's main bird conservation charity. It was founded in 1954 and has 8,000 members and 50 staff. It is Spain's representative in the BirdLife International partnership.

<span class="mw-page-title-main">Indian vulture crisis</span> Ecological crisis in Indian subcontinent

Nine species of vulture can be found living in India, but most are now in danger of extinction after a rapid and major population collapse in recent decades. In the early 1980s, three species of Gyps vultures had a combined estimated population of 40 million in South Asia, while in 2017 the total population numbered only 19,000.

<span class="mw-page-title-main">Jatayu Conservation Breeding Centre, Pinjore</span> Critically Endangered Bird Breeding Centre in Haryana, India

The Jatayu and Sparrow Conservation Breeding Centre (JCBC), is the world's largest facility for the breeding and conservation of Indian vultures and the house sparrow. It is located within the Bir Shikargah Wildlife Sanctuary in the town of Pinjore in the State of Haryana, India. It is run by the Haryana Forests Department and Bombay Natural History Society with the help of British nature conservation charity Royal Society for the Protection of Birds. It is 8 kilometres (5.0 mi) from Pinjore and covers 5 acres (2.0 ha).

A vulture restaurant is a site where carrion, decaying flesh from dead animals, is deposited in order to be consumed by vultures, and is sometimes referred to more generally as supplemental feeding or provisioning. These stations can also be referred to as vulture feeding sites, vulture feeding stations, and vulture safe zones. This supplemental feeding practice is used to provide vultures with reliable, non-contaminated food sources or to aid in monitoring schemes. Vulture restaurants have been instituted as a method of vulture conservation in Europe and Africa since the 1960's and 70's, when vulture populations began to decline. This strategy is used because often population declines are attributed to low food availability, food contamination or insufficient nutritional quality, or feeding from human areas leading to conflict. Notably, large vulture population declines in South Asia, referred to as the Asian or Indian vulture crisis, and Africa, referred to as the African vulture crisis, have brought renewed attention to the uses and impacts of vulture restaurants. Vulture restaurants are used in Asia, Africa, Europe, and North America for various conservation and management plans. They can help combat food-derived threats to vultures, such as diclofenac or lead contamination or conflict with ranchers and poachers. The first vulture restaurant was built in South Africa in 1966. Vulture restaurants operate in a number of countries, including Nepal, India, Cambodia, South Africa, Eswatini, and Spain.

<span class="mw-page-title-main">African vulture trade</span> Use of vulture for various reasons in Sub-Saharan Africa

The African vulture trade involves the poaching, trafficking, and illegal sale of vultures and vulture parts for bushmeat and for ritual and religious use, like traditional medicines, in Sub-Saharan Africa. This illegal trade of vultures and vulture parts is contributing to a population crisis on the continent. In 2017, the IUCN Red List categorized 7 of Africa's 11 vulture species as globally endangered or critically endangered. Recent research suggests that 90% of vulture species declines in Africa may be due to a combination of poisoning and illegal wildlife trade for medicinal use and/or bushmeat. All trade of African vultures is illegal, as these birds are protected by international laws.

<span class="mw-page-title-main">African vulture crisis</span> Ecological disaster in Africa

The African vulture crisis is the name given to the ongoing population decline in several Old World vulture species across Africa. Steep population declines have been reported from many locations across the continent since the early 2000s. The causes are mainly poisoning from baited animal carcasses, and the illegal trade in vulture body parts for traditional medicine. Available data suggest that the African vulture crisis may be similar in scale to the Indian vulture crisis, but more protracted and less well documented.

References

  1. 1 2 3 4 5 6 7 8 BirdLife International (2021). "Gyps coprotheres". IUCN Red List of Threatened Species . 2021: e.T22695225A197073171. doi: 10.2305/IUCN.UK.2021-3.RLTS.T22695225A197073171.en . Retrieved 10 December 2021.
  2. Forster, J. R. (1798). "Le Chasse-siente, der Rothjäger. No. 10 (V. Coprotheres)". F. le Vaillant's Naturgeschichte der afrikanischen Vögel. Halle: Fried. Christoph Dreyssig. pp. 35–37.
  3. "cape vulture". Travelnewsnamibia. Retrieved 20 September 2022.
  4. Dunning, John B. Jr., ed. (2008). CRC Handbook of Avian Body Masses (2nd ed.). CRC Press. ISBN   978-1-4200-6444-5.
  5. 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.
  6. Komen, J., & Brown, C. J. (1993). Food requirements and the timing of breeding of a Cape vulture colony. Ostrich, 64(2), 86-92.
  7. James Ferguson-Lees; Christie; Franklin; Mead; Burton (2001), Raptors of the World, Houghton-Mifflin, ISBN   0-618-12762-3
  8. "Cape vulture facts". Arkive.org. Archived from the original on 2008-10-16.
  9. Vernon, Carl. “The Cape Vulture at Colleywobbles: 1977-1997.” Ostrich 70.3-4 (1999): 200–202. Web.
  10. Mundy, P.J.; Benson, P.C. & Allan, D.G. (1997). "Cape Vulture Kransaalvoël Gyps coprotheres". In Harrison, J.A.; Allan, D.G.; Underhill, L.G.; Herremans, M.; Tree, A.J.; Parker, V. & Brown, C. (eds.). The Atlas of southern African birds. Vol. Non–passerines. Johannesburg: BirdLife South Africa. pp. 158–159. ISBN   9780620207294.
  11. Pfeiffer, M. B.; Venter, J. A.; Downs, C. T. (2017). "Cliff characteristics, neighbour requirements and breeding success of the colonial Cape Vulture Gyps coprotheres". Ibis . 159 (1): 26–37. doi:10.1111/ibi.12428.
  12. 1 2 Simmons, R. E.; Brown, C. J.; Kemper, J. (2015). Birds to watch in Namibia: red, rare and endemic species. Windhoek, Namibia: Namibian Ministry of Environment and Tourism and The Namibian Nature Foundation.
  13. Martens, Francis R.; Pfeiffer, Morgan B.; Downs, Colleen T.; Venter, Jan A. (2020). "Cliff roost site selection of the endangered Cape Vulture Gyps coprotheres in the Eastern Cape province, South Africa". Ostrich. 91: 25–34. doi:10.2989/00306525.2019.1651417. S2CID   213520327.
  14. Hirschauer, Margaret T.; Wolter, Kerri; Neser, Walter (2017). "Natal philopatry in young Cape Vultures Gyps coprotheres". Ostrich. 88: 79–82. doi:10.2989/00306525.2017.1245683. S2CID   90660388.
  15. Martens, F.R.; Pfeiffer, M.B.; Downs, C.T.; et al. (2018). "Post-fledging movement and spatial ecology of the endangered Cape Vulture (Gyps coprotheres)". Journal of Ornithology. 159 (4): 913–922. doi:10.1007/s10336-018-1564-x. S2CID   46954846.
  16. "Corrigendum". Ostrich. 88 (3): 293. 2017. doi: 10.2989/00306525.2017.1380910 . S2CID   220338758.
  17. "Over 500 Rare Vultures Die After Eating Poisoned Elephants In Botswana". Agence France-Press . NDTV. 2019-06-21. Retrieved 2019-06-28.
  18. Hurworth, Ella (2019-06-24). "More than 500 endangered vultures die after eating poisoned elephant carcasses". CNN . Retrieved 2019-06-28.
  19. Solly, M. (2019). "Poachers' Poison Kills 530 Endangered Vultures in Botswana". Smithsonian . Retrieved 2019-06-28.
  20. Ngounou, B. (2019). "BOTSWANA: Over 500 vultures found dead after massive poisoning". Afrik21. Retrieved 2019-06-28.
  21. Phipps, W. Louis; Diekmann, Maria; MacTavish, Lynne M.; Mendelsohn, John M.; Naidoo, Vinny; Wolter, Kerri; Yarnell, Richard W. (2017). "Due South: A first assessment of the potential impacts of climate change on Cape vulture occurrence" (PDF). Biological Conservation. 210: 16–25. doi:10.1016/j.biocon.2017.03.028.
  22. Thompson, Lindy J.; Blackmore, Andrew C. (2020). "A brief review of the legal protection of vultures in South Africa". Ostrich. 91: 1–12. doi:10.2989/00306525.2019.1674938. S2CID   216215669.
  23. Craig, Christie A.; Thomson, Robert L.; Girardello, Marco; Santangeli, Andrea (2019). "The drivers and extent of poison use by Namibia's communal farmers: Implications for averting the African vulture crisis". Ambio. 48 (8): 913–922. doi:10.1007/s13280-018-1128-6. PMC   6541661 . PMID   30484066.
  24. Didarali, Z.; Kuiper, T.; Brink, C.W.; et al. (2022). "Awareness of environmental legislation as a deterrent for wildlife crime: A case with Masaai pastoralists, poison use and the Kenya Wildlife Act". Ambio. 51 (7): 1632–1642. doi:10.1007/s13280-021-01695-8. PMC   9110623 . PMID   35079963.

Further reading