Cinereous Vulture

Cinereous Vulture, Monniksgier, Mönchsgeier, Abutre-preto, Buitre Negro

Spotted in the Alentejo region of Portugal.

The Cinereous Vulture (Aegypius monachus) is also known as the Black Vulture, Monk Vulture, or Eurasian Black Vulture. It is a member of the family Accipitridae, which also includes many other diurnal raptors such as kites, buzzards and harriers. It is one of the two largest old world vultures. 

Black vulture Birding portugal
Black vulture

This bird is an Old World vulture, and is only distantly related to the New World vultures, which are in a separate family, Cathartidae, of the same order. It is therefore not directly related to the much smaller American Black Vulture despite the similar name and coloration.

The Cinereous Vulture is a Eurasian species. The western limits of its range are in Spain and inland Portugal, with a reintroduced population in south France. They are found discontinuously to Greece, Turkey and throughout the central Middle East. Their range continues through Afghanistan eastwards to northern India to its eastern limits in central Asia, where they breed in northern Manchuria, Mongolia and Korea. Their range is fragmented especially throughout their European range. It is generally a permanent resident except in those parts of its range where hard winters cause limited altitudinal movement and for juveniles when they reach breeding maturity. In the eastern limits of its range, birds from the northernmost reaches may migrate down to southern Korea and China. A limited migration has also been reported in the Middle East but is not common.

This vulture is a bird of hilly, mountainous areas, especially favoring dry semi-open habitats such as meadows at high altitudes over much of the range. They are always associated with undisturbed, remote areas with limited human disturbance. They forage for carcasses over various kinds of terrain, including steppe, grasslands, open woodlands, along riparian habitats or any kind of mountainous habitat. In their current European range and through the Caucasus and Middle East, Cinereous Vultures are found from 100 to 2,000 m (330 to 6,600 ft) in elevation, while in their Asian distribution, they are typically found at higher elevations. Two habitat types were found they are found to be preferred by the species in China and Tibet. Some Cinereous Vultures in these areas live in mountainous forests and shrubland from 800 to 3,800 m (2,600 to 12,500 ft), while the others preferred arid or semi-arid alpine meadows and grasslands at 3,800 to 4,500 m (12,500 to 14,800 ft) in elevation. Juvenile and immature Cinereous Vultures may move large distances across undeveloped open-dry habitats in response to snowfall or high summer temperatures.

The Cinereous Vulture is believed to be the largest true bird of prey in the world. The condors, slightly larger, are now generally considered unrelated to the true raptors. The Himalayan Griffon Vulture is the closest rival to the size of the Cinereous, with a similar average wingspan, weight and a longer overall length, thanks to a distinctly longer neck. The largest Cinereous vultures exceed the weight and wingspan of the largest Himalayan Griffon, and the Cinereous is the larger species going on standard measurements. This huge bird measures 98–120 cm (39–47 in) long with a 2.5–3.1 m (8.2–10 ft) wingspan. The body mass in this species can range from 7 to 14 kg (15 to 31 lb). It is thus one of the world’s heaviest flying birds. Despite limited genetic variation in the species, body size increases from west to east, with the birds from southwest Europe (Spain and south France) averaging about 10% smaller than the vultures from central Asia (Manchuria, Mongolia and northern China). Among standard measurements, the wing chord is 73–89 cm (29–35 in), the tail is 33–41 cm (13–16 in) and the tarsus is 12–14.6 cm (4.7–5.7 in).

The Cinereous Vulture is distinctly dark, with the whole body being dark brown excepting the pale head in adults, which is covered in fine down. The juveniles are blackish in coloration and, from a distance, flying birds can easily appear all black. The massive blue-gray bill is the largest of any living accipiterid, a feature enhanced by the relatively small skull of the species. The exposed culmen of the Cinereous Vulture measures 8–9 cm (3.1–3.5 in). The wings, with serrated leading edges, are held straight or slightly arched in flight and are broad, sometimes referred to as “barn door wings”. Their flight is slow and buoyant, with deep, heavy flaps when necessary. The combination of huge size and dark coloration renders the Cinereous Vulture relatively distinct, especially against smaller raptors such as eagles or hawks. The most similar-shaped species, the Lappet-faced Vulture (with which there might be limited range overlap in the southern Middle East), is distinguished by its bare, pinkish head and contrasting plumage. On the Lappet-face, the thighs and belly are whitish in adult birds against black to brownish over the remainder of the plumage. All potential Gyps vultures are distinguished by having paler, often streaky plumage, with bulging wing primaries giving them a less evenly broad-winged form.

The Cinereous Vulture is a largely solitary bird, being found alone or in pairs much more frequently than most other Old World vultures. At large carcasses or feeding sites, small groups may congregate. Such groups can exceptionally include 12 vultures, with unconfirmed reports of up to 30 in very old reports.

They breed in loose colonies, with nests rarely being found in the same tree or rock formation, unlike other Old World vultures which often nest in tight-knit colonies. In Spain, nests have been found from 300 m (980 ft) to 2 km (6,600 ft) apart from each other. The Cinereous Vulture breeds in high mountains and large forests, nesting in trees or occasionally on cliff ledges. The breeding season lasts from February until August or September. The commonest display consists of synchronous flight movements by pairs. However, flight play between pairs and juveniles is not unusual, with the large birds interlocking talons and spiraling down through the sky. The birds use sticks and twigs as building materials, and males and females cooperate in all matters of rearing the young. The huge nest is 1.45–2 m (4.8–6.6 ft) across and 1–3 m (3.3–9.8 ft) deep. The nest increases in size as a pair uses it repeatedly over the years and often comes to be decorated with dung and animal skins. The nests can range up to 1.5 to 12 m (4.9 to 39 ft) high in a large tree such as an oak, juniper, almond or pine trees. Most nesting trees are found along cliffs. The egg clutch typically only a single egg, though 2 may be exceptionally laid. The incubation period can range from 50 to 62 days, averaging 50–56 days. The newly hatched young are semi-altricial. Fledging is reported when the nestlings are 104–120 days old, though dependence on parents can continue for another 2 months. Radio-satellite tracking suggests the age of independence of juveniles from their parents to be 5.7–7 months after hatching (i.e. 2–3 months after fledging. The nesting success of Cinereous Vultures is relatively high, with around 90% of eggs successfully hatching and more than half of yearling birds known to survive to adulthood. They are devoted, active parents, with both members of a breeding pair protecting the nest and feeding the young in shifts via regurgitation. This species may live for up to 39 years, though 20 years or less is probably more common, with no regular predators other than man.

Like all vultures, the Cinerous Vulture eats mostly carrion. The Cinereous Vulture feeds on carrion ranging from the largest mammals available to fish and reptiles. In Tibet, commonly eaten carcasses can include both Wild and Domestic Yaks, Bharal, Tibetan Gazelles, Kiangs, Woolly Hares, Himalayan Marmots, Domestic Sheep and even humans, mainly those at their celestial burial grounds. Reportedly in Mongolia, Tarbagan Marmots comprised the largest part of the diet, although that species is now endangered as it is preferred in the diet of local people. Among the vultures in its range, the Cinereous is best equipped to tear open tough carcass skins thanks to its powerful bill. It can even break apart bones, such as ribs, to access the flesh of large animals. It is dominate over other scavengers in its range, even over other large vultures such as Griffon Vulture or fierce ground predators such as foxes. While noisy Gyps vultures squawk and fly around, the often silent Cinereous will keep them well at bay until they are satisfied and have had their own fill. Its closest living relative may be the Lappet-faced Vulture, which takes live prey on occasion. Occasionally, the Cinereous Vulture has been recorded as preying on live tortoises, which the vultures are likely to kill by carrying in flight and dropping on rocks to penetrate the shell, and lizards. Additionally, Cinereous Vultures have been recorded as flying low around herds of Argali with females and lambs, possibly seeking to predate the lambs.

This species can fly at a very high altitude. It has a specialised haemoglobin alphaD subunit of high oxygen affinity which makes it possible to take up oxygen efficiently despite the low partial pressure in the upper troposphere.

The Cinereous Vulture has declined over most of its range in the last 200 years in part due to poisoning by eating poisoned bait put out to kill dogs and other predators, and to higher hygiene standards reducing the amount of available carrion; it is currently listed as Near Threatened. Vultures of all species, although not the target of poisoning operations, may be shot on sight by locals. Trapping and hunting of Cinereous Vultures is particularly prevalent in China and Russia. Perhaps an even greater threat to this desolation-loving species is development and habitat destruction. Nests, often fairly low in the main fork of a tree, are relatively easy to access and thus have been historically compromised by egg and firewood collectors regularly. The decline has been the greatest in the western half of the range, with extinction in many European countries (France, Italy, Austria, Poland, Slovakia, Albania, Moldovia, Romania) and its entire breeding range in northwest Africa (Morocco and Algeria). They no also longer nest in Israel. More recently, protection and deliberate feeding schemes have allowed some local recoveries in numbers, particularly in Spain, where numbers increased to about 1,000 pairs by 1992 after an earlier decline to 200 pairs in 1970. This colony have now spread its breeding grounds to Portugal. Elsewhere in Europe, very small but increasing numbers breed in Bulgaria and Greece, and a re-introduction scheme is under way in France. Trends in the small populations in Ukraine (Crimea) and European Russia, and in Asian populations, are not well recorded. In the former USSR, it is still threatened by illegal capture for zoos, and in Tibet by rodenticides. It is a regular winter visitor around the coastal areas of Pakistan in small numbers. As of the turn of the 21st century, the worldwide population of Cinereous Vultures is estimated at 4500-5000 individuals.

The genus name Aegypius is a Greek word (????????) for ‘vulture’, or a bird not unlike one; Aelian describes the aegypius as “halfway between a vulture (gyps) and an eagle”. Some authorities think this a good description of a lammergeier; others do not. Aegypius is the eponym of the species, whatever it was. The English name ‘Black Vulture’ refers to the plumage colour, while ‘Monk Vulture’, a direct translation of its German name Mönchsgeier, refers to the bald head and ruff of neck feathers like a monk’s cowl. ‘Cinereous Vulture’ (Latin cineraceus, ash-coloured; pale, whitish grey), was a deliberate attempt to rename it with a new name distinct from the American Black Vulture.

Other synonyms:

Afrikaans: Kransaasvoël
Catalan: Trencalòs, Voltor negre
Catalan (Balears): Voltor negre
Valencian: Trencalòs
Czech: Sup hnedý, sup hnìdý
Danish: Munkegrib
German: Kuttengeier, Moenchsgeier, Mönchsgeier
English: Black Vulture, Cinereous Vulture, Eurasian Black Vulture, Eurasian Black Vuture, European Black Vulture, Monk Vulture, Old World Black Vulture
Spanish: Buitre Encapuchado, Buitre Negro
Estonian: raisakotkas
Basque: Sai beltz, Sai motza, Voltor negre
Finnish: Munkkikorppikotka, mustakondori
French: Vautour arrian, Vautour moine
Galician: Voitre negro, Voltor negre
Croatian: Sup starješina
Hungarian: Barátkeselyû
Icelandic: Kuflgammur
Italian: Avvoltoio monaco
Japanese: kurohagewashi, Kuro-hagewashi, Kurohage-washi
Latin: Aegypius monachus
Lithuanian: Juodasis grifas, Tamsusis grifas
Latvian: Maitu lija, Melnais grifs
Dutch: Monniksgier, Ruigpootuil
Norwegian: Munkegribb
Polish: sep kasztanowaty
Portuguese: abutre preto, Abutre-preto
Romansh: Tschess da chapitsch
Russian: Chyorny Grif
Slovak: Sup tmavohnedý, sup tmavohnedý (sup tmavý)
Slovenian: rjavi jastreb
Albanian: Shkaba e zezë
Serbian: crni strvinar
Swedish: Grågam
Turkish: Kara (Esmer, Rahip) Akbaba, Kara akbaba

 

Travel Birdwatching Holiday Alentejo, Vacation Portugal for birders guided birdwatching Tours and Trips.

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Guided Birdwatching in the Alentejo region of Portugal