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Biology

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Like other birds of prey, the Henst's goshawk is an accomplished predator, with acute eyesight, a powerful bill, and sharp, curved talons (5). With this armoury, it hunts and feeds on forest birds, poultry and mammals (2), including lemurs. It is capable of taking a range of lemur species, from the smallest to one of the largest, capturing and returning to its nest with a lemur weighing up to four kilograms (6). The Henst's goshawk hunts mainly from a hidden perch (2), but will also search for prey as it flies swiftly through the forest; rarely does it soar over the forest canopy (2) (6). Henst's goshawks construct large nests of sticks in the main fork of a tree, occasionally within a eucalyptus plantation. Eggs are laid from October to November, from which hatch white, downy chicks (2).
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Conservation

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Henst's goshawk occurs in several protected areas including Ranomafana National Park (6) and Tsingy de Bemaraha Strict Nature Reserve (9), which may offer some protection from the threat of deforestation. The government of Madagascar, along with numerous conservation organisations, recognise the importance of conserving the islands' unique and stunning biodiversity, and in 2003, the president of Madagascar pledged to triple the coverage of protected areas (8). There are many obstacles and challenges still ahead, but there is hope they can be overcome, for the sake of the animal, plant and human inhabitants of Madagascar.
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Description

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This large bird of prey, found only on the biologically unique island of Madagascar, has largely dark brownish-grey plumage. The underparts are finely barred with greyish-brown and white (2), a distinctive pale strip runs above the yellow eyes, and the long legs are also yellow (2) (4). When flying through the forest, the Henst's goshawk's rounded wings, long, barred tail and pale rump can be seen (4). The female Henst's goshawks are distinctly larger than males, while juveniles can be distinguished by the large brown spots on the breast and belly (2) (4). During the breeding season, Henst's goshawks can be loud, vocal birds, with a rapid 'keey-keey-keey' uttered while perched or in flight (4)
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Habitat

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Henst's goshawks inhabit the primary rainforest of eastern Madagascar and the dry forests in the western parts of the island, from sea level up to an elevation of 1,800 metres. It sometimes also occurs in secondary woodland (2)
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Range

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Endemic to Madagascar, where it occurs in the east and west, but is not known from the drier south (2)
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Status

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Classified as Near Threatened (NT) on the IUCN Red List 2007 (1), and listed on Appendix II of CITES (3).
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Threats

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This large forest raptor is not common, but appears to be present in almost all large forest blocks that have been surveyed (7). However, its dependency on forest habitat makes its vulnerable to deforestation (2), a threat which impacts much of the biodiversity of Madagascar. Agriculture, including rice cultivation, slash-and-burn agriculture and cattle grazing, has resulted in the loss of over 80 percent of Madagascar's natural vegetation (8), with knock-on effects for the animals, plants and people which rely on this vital resource.
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Accipiter henstii ( Azerbaijani )

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Accipiter henstii (lat. Accipiter henstii) - əsl qırğı cinsinə aid heyvan növü.

Mənbə

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Accipiter henstii: Brief Summary ( Azerbaijani )

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Accipiter henstii (lat. Accipiter henstii) - əsl qırğı cinsinə aid heyvan növü.

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Accipiter henstii ( Breton )

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Accipiter henstii[1] a zo ur spesad evned-preizh eus kerentiad an Accipitridae.

Anvet e voe Astur henstii (kentanv) da gentañ-penn (e 1873) gant al loenoniour alaman Hermann Schlegel (1804-1884) : dougen a ra anv al loenoniour izelvroat Gideon Daniël van der Henst (?-?).

Doareoù pennañ

Boued

Annez

Emañ brosezat ar spesad e koadegi ha savanennoù Madagaskar[2].

Liammoù diavaez

Notennoù ha daveennoù

  1. N'en deus ar spesad anv boutin ebet testeniekaet e brezhoneg evit poent.
  2. Accipiter henstii war al lec'hienn Avibase.
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Accipiter henstii: Brief Summary ( Breton )

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Accipiter henstii a zo ur spesad evned-preizh eus kerentiad an Accipitridae.

Anvet e voe Astur henstii (kentanv) da gentañ-penn (e 1873) gant al loenoniour alaman Hermann Schlegel (1804-1884) : dougen a ra anv al loenoniour izelvroat Gideon Daniël van der Henst (?-?).

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Astor de Madagascar ( Catalan; Valencian )

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L'astor de Henst (Accipiter henstii) és un ocell de la família dels accipítrids (Accipitridae) que habita zones boscoses i sabanes de les terres baixes de Madagascar.

Referències


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Astor de Madagascar: Brief Summary ( Catalan; Valencian )

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L'astor de Henst (Accipiter henstii) és un ocell de la família dels accipítrids (Accipitridae) que habita zones boscoses i sabanes de les terres baixes de Madagascar.

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Gwyddwalch Henst ( Welsh )

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Aderyn a rhywogaeth o adar yw Gwyddwalch Henst (sy'n enw gwrywaidd; enw lluosog: gwyddweilch Henst) a adnabyddir hefyd gyda'i enw gwyddonol Accipiter henstii; yr enw Saesneg arno yw Henst's goshawk. Mae'n perthyn i deulu'r Eryr (Lladin: Accipitridae) sydd yn urdd y Falconiformes.[1]

Talfyrir yr enw Lladin yn aml yn A. henstii, sef enw'r rhywogaeth.[2]

Teulu

Mae'r gwyddwalch Henst yn perthyn i deulu'r Eryr (Lladin: Accipitridae). Dyma rai o aelodau eraill y teulu:

Rhestr Wicidata:

rhywogaeth enw tacson delwedd Barcud wynepgoch Gampsonyx swainsonii Boda gwerni Circus aeruginosus
Western Marsh Harrier- Bangalore, India.jpg
Boda gwerni Affrica Circus ranivorus
Circus ranivorus.jpg
Boda Montagu Circus pygargus
Flickr - don macauley - Bird 015.jpg
Boda tinwyn Circus cyaneus
Circus cyaneus, Ballaugh Curragh, Isle of Man 1.jpg
Eryr môr torwyn Haliaeetus leucogaster
Haliaeetus leucogaster -Gippsland, Victoria, Australia-8.jpg
Eryr nadroedd Madagasgar Eutriorchis astur
EutriorchisAsturKeulemans.jpg
Eryr y Môr Haliaeetus albicilla
Adult White-tailed Eagle defending prey, Rezerwat Gostynin-Wloclawek, Poland.jpg
Fwltur yr Aifft Neophron percnopterus
Egyptian vulture.jpg
Gwalch Caledonia Newydd Accipiter haplochrous
Accipiter haplochrous 1859.jpg
Gwalch Glas Accipiter nisus
Accnis edit.jpg
Gwalch Gray Accipiter henicogrammus Gwalch Marth Accipiter gentilis
Northern Goshawk ad M2.jpg
Diwedd y rhestr a gynhyrchwyd yn otomatig o Wicidata.

Gweler hefyd

Cyfeiriadau

  1. Gwefan Cymdeithas Edward Llwyd; adalwyd 30 Medi 2016.
  2. Gwefan Avibase; adalwyd 3 Hydref 2016.
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Gwyddwalch Henst: Brief Summary ( Welsh )

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Aderyn a rhywogaeth o adar yw Gwyddwalch Henst (sy'n enw gwrywaidd; enw lluosog: gwyddweilch Henst) a adnabyddir hefyd gyda'i enw gwyddonol Accipiter henstii; yr enw Saesneg arno yw Henst's goshawk. Mae'n perthyn i deulu'r Eryr (Lladin: Accipitridae) sydd yn urdd y Falconiformes.

Talfyrir yr enw Lladin yn aml yn A. henstii, sef enw'r rhywogaeth.

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Madagaskarhabicht ( German )

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Der Madagaskarhabicht (Accipiter henstii) ist ein endemisch auf Madagaskar vorkommender Greifvogel aus der Familie der Habichtartigen (Accipitridae), der zu den größeren Arten dieser Familie zählt.

Die Bestandssituation des Madagaskarhabichts wird von der IUCN mit potentiell gefährdet (near threatened) angegeben.[1] Es werden keine Unterarten unterschieden.

Erscheinungsbild

Der Madagaskarhabicht erreicht eine Körperlänge von 52 bis 62 Zentimeter, wovon beim Männchen 24,4 bis 25,8 Zentimeter auf das Schwanzgefieder entfallen, beim Weibchen durchschnittlich 28 Zentimeter. Die Flügel haben bei den Männchen eine Länge von 27,6 bis 28,3 Zentimeter, bei den Weibchen von 31,8 bis 33 Zentimeter.[2] Die Flügelspannweite beträgt 86 bis 100 Zentimeter. Das Gewicht liegt bei den Männchen etwa 600 Gramm, die Weibchen werden bis zwischen 960 und 1140 Gramm schwer.[1] Die Augen adulter Vögel sind gelb. Der Schnabel ist gelb, die Wachshaut ist grünlich gelb. Die Beine und Füße sind bei beiden Geschlechtern gelb. Abgesehen vom Größenunterschied gibt es keinen auffälligen Geschlechtsdimorphismus.

Adulte Madagaskarhabichte sind auf der Körperoberseite schiefergrau und auf der Körperunterseite weiß mit einer feinen, aber auffälligen Querbänderung. Der Überaugenstreif ist nur angedeutet. Jungvögel sind auf der Körperoberseite blassbraun.

Verwechslungsmöglichkeiten

Madagaskarshabichte ähneln dem Madagaskarsperber, der jedoch mit einer Körperlänge zwischen 29 und 42 Zentimetern[3] deutlich kleiner ist. Etwa so groß wie der Madagaskarsperber ist auch der Echsenhabicht (Accipiter francesiae), dessen Unterseite heller und weniger stark gesperbert ist.

Verbreitungsgebiet und Lebensraum

Der Madagaskarhabicht kommt ausschließlich auf Madagaskar vor. Er fehlt im Landesinneren, besiedelt aber die Küstenregionen im Osten, Norden und Westen, während er im Süden fehlt. Sein Lebensraum ist vor allem der Primärwald. Er kommt gelegentlich auch im Sekundärwald und in mit Bäumen dicht bestandener Savanne vor. In diesen Lebensräumen ist er vor allem in Wäldern entlang von Fließgewässern anzutreffen. Er benötigt Lebensräume, die weitgehend unberührt geblieben sind.

Der Madagaskarhabicht ist in seinem gesamten Verbreitungsgebiet ein Standvogel.

Lebensweise

Der Madagaskarhabicht kommt auch außerhalb der Brutzeit überwiegend paarweise vor. Er ist häufiger zu beobachten, wie er hoch oben in der Luft kreist. Aufgebaumte Madagaskarhabichte sitzen dagegen meist im Blattwerk versteckt und sind deshalb schwierig auszumachen.[4]

Die Nahrung besteht überwiegend aus Vögeln, gelegentlich schlägt der Madagaskarhabicht aber auch Säugetiere wie beispielsweise Lemuren. Er schlägt auch Hausgeflügel in den Dörfern seines Lebensraums. Während der Jagd sitzt er häufig lange regungslos auf einer Ansitzwarte. Er jagt seine Beutetiere jedoch auch in schneller Verfolgungsjagd.

Die Brutzeit fällt in den Zeitraum Oktober bis Februar. Das Nest wird hoch oben in Bäumen errichtet und aus großen Ästen gebaut. Das Gelege besteht aus zwei Eiern. Über die Brutzeit und die Nestlingszeit ist bislang nichts bekannt.[4]

Literatur

  • J. Ferguson-Lees, D. A. Christie: Raptors of the World. Christopher Helm, London 2001, ISBN 0-7136-8026-1.

Einzelnachweise

  1. a b Handbook of the Birds of the World zum Madagaskarhabicht aufgerufen am 10. Juni 2017.
  2. Ferguson-Lees & Christie: Raptors of the World. S. 595.
  3. A. C. Kemp, G. M. Kirwan & D. A. Christie (2017). Madagascar Sparrowhawk (Accipiter madagascariensis). In: J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie & E. de Juana (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (eingesehen bei https://birdsoftheworld.org/bow/species/madspa1/cur/introduction am 20. März 2017).
  4. a b Ferguson-Lees & Christie: Raptors of the World. S. 594.
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Madagaskarhabicht: Brief Summary ( German )

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Der Madagaskarhabicht (Accipiter henstii) ist ein endemisch auf Madagaskar vorkommender Greifvogel aus der Familie der Habichtartigen (Accipitridae), der zu den größeren Arten dieser Familie zählt.

Die Bestandssituation des Madagaskarhabichts wird von der IUCN mit potentiell gefährdet (near threatened) angegeben. Es werden keine Unterarten unterschieden.

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Henst's goshawk

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Henst's goshawk (Accipiter henstii) is a species a bird of prey in the family Accipitridae. It is a large, diurnal bird endemic to the island of Madagascar. It is an obligate forest species that occurs at very low densities on the island and is rarely seen. It can only occupy the primary and secondary forests found within the island. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, subtropical or tropical moist montane forest, and plantations.

It is threatened by habitat loss within Madagascar.

Description

The Henst's goshawk is a large forest raptor with a body length of 52 to 62 cm (20 to 24 in). The wingspan is between 86 and 100 cm (34 and 39 in).[2][3][4] There is a notable size discrepancy between males and females, with males weighing 609 g (1.343 lb) on average and the larger females weighing 960 to 1,140 g (2.12 to 2.51 lb) on average. It is one of the world's largest Accipiters, rivaling the northern goshawk and Meyer's goshawk.[4][5]

The body is mostly covered in a dark brownish-grey plumage that is quite indistinct while the underparts are lighter in colouration and have a barred pattern.[2] Juvenile colouration will vary and can be distinguished by having large brown spots on the breast and belly.[6] A strong distinguishing feature is a pale eye line on the contrasting dark head. The eyes and long legs of the species are yellow in colour.

In flight, the Henst's goshawk will have its rounded wings and long, barred tail on display. Moreover, the pale coloured rump may be used to aid in identification of a flying individual.[2]

Mimic

Henst's goshawk may be easily confused with an apparent mimic species also present in Madagascar, the Madagascar serpent eagle (Eutriorchis astur).[7] These species may be distinguished using a few key features. The first is size: Henst's goshawk is a much larger bird. The barred pattern present on the breast of Henst's goshawk is also more distinct than that of the Madagascar serpent eagle, which will have a more muted pattern with lighter coloration.[8]

Taxonomy

Henst's goshawk is a species within the genus Accipiter. This diverse group of birds mostly consists of goshawks and sparrowhawks. This group is morphologically distinct in that they lack a procoracoid foramen (a hole at the base of procoracoid bone).[9] This genus is within the family Accipitridae and order Accipitriformes which together make up the majority of the diurnal birds of prey.

The species was first described by Hermann Shlegel, a German ornithologist (who had a position at the Rijksmuseum van Natuurlijke Historie in Leiden, The Netherlands), in 1873.

There are two other Accipiter present on the island of Madagascar: France's sparrowhawk (Accipiter francesii) and Madagascar sparrowhawk (Accipiter madagascariensis), both of which are smaller than the Henst's goshawks.[8]

Distribution and habitat

The Henst's goshawk has a limited distribution within Madagascar due to specific habitat requirements. The preferred habitats of the Henst's goshawk are primary rainforests and occasionally secondary woodland. Due to the physical geography of Madagascar these areas are restricted to the North, West and East of the island and do not occur within the southern portion. The southern portion of the island contains more arid and dry forests not suitable for raptor foraging. Consequently, the distribution of the Henst's goshawk follows that of its preferred forest habitat and is not found in the southern portion of the island.[10] The primary forests of Madagascar may be categorized as dry deciduous and humid evergreen, both of which are occupied by Henst's goshawk.

Accipter Henstii is known as an obligate forest species meaning it relies on forested habitat. This poses a problem, since these habitats are quickly being lost due to development in the region. However, it has been spotted within Eucalyptus plantations in the region. And may use these plantations to supplement for lost habitat.

Within this range, it is known to be a rare species that occurs at low densities, but present within all non-arid forests. The estimated range of occurrence is approximately 673000 km2. With a vertical range of occurrence ranging from sea level to 1800m above sea level.[1] As a top predator, large area requirements are necessary for foraging, explaining why the species occurs at low densities.

Behaviour

The goshawk will mainly hunt from a hidden perch within the forest and will rarely soar above the canopy cover.[6]

Reproduction

Accipiter Henstii will form breeding pairs that are known as "socially monogamous".[11] Therefore, breeding pairs may seem like monogamous pairs but only do so for chick rearing, and will actively seek extra pair copulations on the side. Little is known about the courtship process of Henst's other than a "switchbacking" display observed by Safford and Duckworth.[12] These displays constitute hairpin turns and aerial displays followed by a distinct breeding vocalization. Following copulation, egg-laying takes place in October-November. A preference has been noted for nest sites to occur in high stature forests near a water course.[13]

Both adults take part in constructing large, bulky nests within the main fork of trees.[1] These nests may also be built within the aforementioned Eucalyptus plantations present on the island.The only observed clutch size has been 2 eggs with the measurements of 57.0 x 41.2 and 60.0 x 42.7 mm.[14]

Henst's appear to exhibit some sort of site fidelity, where the previous year's nest is re-used or another one is built only a couple of hundred meters away from the original.[15] Site fidelity is most likely explained by the specificity of preferred nest habitat to occur in old growth forests near water.

Nest predation

Although known as a climax predator within Madagascan rainforests, nest-predation has been observed within multiple Henst's goshawk populations. Following gestation, the female Goshawk will leave the nest unattended for long periods of time, while males only feed the chicks sporadically, leaving the nest vulnerable to predation events at the hands of Harrier-hawks, whereby chicks within unattended nests were quickly killed and consumed by a circling harrier-hawk on multiple occasions.[13]

Diet

The Henst's goshawk is an adept forest predator whose diet mainly consists of medium to large sized birds and mammals.[11] With powerful eyesight, large curved talons and a curved raptor beak it is an extremely adept predatory animal. Hunting occurs from a discrete tree perch or from low forest floor flight.[15] Henst's goshawk will not leave the canopy cover while foraging.

The preferred prey are lemurs and poultry that occur within primary forest habitat. The ability to hunt lemurs makes the Henst's goshawk an important part of the Madagascan food web. Henst's also does not exhibit a species preference and will hunt a large range of lemurs as well, ranging from 100g to 4kg.[2] Thereby Henst's plays an important role in maintaining population health in Lemurs by reducing the abundance of diseased and old individuals, keeping the population healthy.

Vocalizations

The basic call is a loud, crackling and rapid "ang-ang-ang-ang...".[1] These vocalizations can be heard crackling through the canopy when in flight. However, these calls are rarely heard as Henst's is a more secretive species.

Except for the breeding season, when the Henst's goshawk can be very loud and vocal.[15] They will utter a rapid succession of "keey-keey-keey' in order to communicate with potential breeding partners.[2]

Conservation

An assessment by Birdlife International in 2016 has placed Accipiter Henstii as Vulnerable on the IUCN Red List.[1][16] The justification for this conservation status is the relatively small population size estimated at 1000–2,250 individuals. With that population, the number of breeding adults is estimated to be 670-1500 individuals. This population is estimated to be decreasing due to deforestation and human disturbance.[1]

The species is quite sparse and elusive to most surveys and therefore accurate population measures are difficult to obtain. A more thorough investigation of the population is declined and most likely will lead to a higher threat category.

Henst's goshawk occurs in several protected areas within Madagascar such as the Ranomafana National Park and the Tsingy de Bemaraha Strict Nature Reserve.[1] The Madagascan Government has pledged to further protect the island’s unique biodiversity.

References

  1. ^ a b c d e f g BirdLife International (2020). "Accipiter henstii". IUCN Red List of Threatened Species. 2020. Retrieved 10 December 2020.
  2. ^ a b c d e "Henst's goshawk videos, photos and facts - Accipiter henstii". Arkive. Archived from the original on 2010-12-21. Retrieved 2018-10-11.
  3. ^ Sinclair, I. (2013). Birds of the Indian Ocean islands. Penguin Random House South Africa.
  4. ^ a b Kemp, A. C., D. A. Christie, and G. M. Kirwan (2020). Henst's Goshawk (Accipiter henstii), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA.
  5. ^ Ferguson-Lees, J., & Christie, D. A. (2001). Raptors of the world. Houghton Mifflin Harcourt.
  6. ^ a b del Hoyo, J., Elliott, A. and Sargatal, J. (1994) Handbook of the Birds of the World. Vol. 2: New World Vultures to Guineafowl. Lynx Edicions, Barcelona.
  7. ^ Negro JJ. 2008. Two aberrant serpent eagles may be visual mimics of bird-eating raptors. IBIS International Journal of Avian Science, 150(2): 307-314
  8. ^ a b Ferguson-Lees, James, and David A. Christie. Raptors of the world. Houghton Mifflin Harcourt, 2001.
  9. ^ Olson, L.S. 1987. Variation in the Procoracoid Foramen in the Accipitridae. Rivista Italiana di Ornitologia, 57(3-4): 161-164
  10. ^ "Henst's Goshawk (Accipiter henstii)". www.hbw.com. Retrieved 2018-10-11.
  11. ^ a b Gardner CJ, Jasper LD. 2014. Accipeter henstii(Shlegel,1873)(Falconiformed:Accipitridae): New distribution record from southwest Madagascar. Checklist 10(1):164-165
  12. ^ Safford, R., and W. Duckworth. 1988. A wildlife survey of Marojely Nature Reserve, Madagascar. International Council for Bird Preservation Study Report no. 40. ICBP, Cambridge, UK.
  13. ^ a b Watson RT, Thornstrom R. 1996. Breeding records and nestling predation of Henst's goshawks on Masoala Peninsula. Ostrich- Journal of African Ornithology 67:168-170
  14. ^ Rand AL. 1936. The distribution and habits of Madagascar birds. Bulletin of the American Museum of Natural History 72:143-500
  15. ^ a b c Global Raptor Information Network. 2018. Species account: Henst's goshawk Accipiter henstii. Downloaded from http://www.globalraptors.org on 11 Oct. 2018
  16. ^ "Henst's goshawk (Accipiter henstii) - BirdLife species factsheet". datazone.birdlife.org. Retrieved 2018-10-11.
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Henst's goshawk: Brief Summary

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Henst's goshawk (Accipiter henstii) is a species a bird of prey in the family Accipitridae. It is a large, diurnal bird endemic to the island of Madagascar. It is an obligate forest species that occurs at very low densities on the island and is rarely seen. It can only occupy the primary and secondary forests found within the island. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, subtropical or tropical moist montane forest, and plantations.

It is threatened by habitat loss within Madagascar.

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Hensta akcipitro ( Esperanto )

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La Hensta akcipitro (Accipiter henstii) estas taga rabobirdo el familio de Akcipitredoj kiu inkludas ankaŭ multajn aliajn tagajn rabobirdojn kiel agloj, buteoj kaj cirkuoj.

Distribuado kaj habitato

Ĝi estas endemia de Madagaskaro pli precize en la norda marbordareo al Ranomafana kaj en la okcidenta marbordareo el 21a grado de suda latitudo. Tiu specio forestas el la interno de la insulo. La specio estas monotipa, tio estas ne estas dividata en rasoj. Ties natura habitato estas subtropikaj aŭ tropikaj sekaj arbaroj, humidaj arbaroj aŭ humidaj montararbaroj kaj plantejoj. Sed ankaŭ en duarangaj arbaroj (rearbarigitaj), savanoj kun arbustaro kaj ĉeriveraj arbaraj areoj. Ili preferas praarbarojn, sed povas eĉ nestumi en plantejoj de eŭkaliptoj. Foje ili kuraĝiĝas al malferma kamparo. Ili vivas el 1800 m al marnivelo.

Ĝi estas minacata pro habitatoperdo.

Aspekto

Temas pri grandaj akcipitredoj 52 al 62 cm longaj kun enverguro de 86–100 cm. Ĉefaj karakteroj estas hela superokulo, granda beko, mallongaj rondoformaj flugiloj kaj longa vosto, longaj kruroj kaj povegaj piedoj. Kvankam ili havas pli mallongajn flugilojn kaj pli longajn krurojn, ili havas plumaron, grandon kaj konturon ege similajn al tiuj de la Akcipitro. Ambaŭ seksoj estas identaj sed la ino estas 12 al 20% pli granda. Junuloj distingeblas facile el plenkreskuloj pro sia plumaro pli bruna.

Ĉe plenkreskulo, la supraj partoj estas malhele ardezbrunaj. La superokulo estas formata de serio de helaj makuletoj kaj la malhelaj vostaj strioj estas relative ne tro markataj. La subaj partoj estas blankaj kun tre fajna sed abonda nigra horizontala strieco. Ĉe inoj, la strieco estas pli markata. La irisoj estas flavaj. La vaksaĵo estas verdecflava, la piedoj flavaj.

Tiu specio estas bruema proksime de la nesto: ili estas pli aŭdataj ol vidataj. La ĉefa krikanto estas "kujii kujii kujii kujii" elsendata regule el ripozejo. Estas ankaŭ iu akra "kak-kak-kak" de la reprodukta sezono.

Kutimaro

Tiuj birdoj vivas ofte laŭ paroj, eĉ for de la reprodukta sezono. Ŝajne cirklaj altaj ceremoniaj flugoj gravas por paroformado kaj markado de la teritorio ĉefe septembre. Ili faras same komunajn ŝvebadojn, kaj ondecajn flugojn similajn al tiuj de la Akcipitro.

Tiu specio oftas ĉe ripozejo ĉu kaŝe ĉu elstare ĉe arbara pado, el kie gvatas eblajn predojn kiuj estos kaptataj surgrunde, kaj malofte post persekuto traarbara.

Reproduktado

La reprodukta sezono probable pluas el oktobro al februaro. La nesto estas konstruata el ligneroj kaj kovrata el verdaj folioj. Ĝi estas el 80 al 150 cm larĝa kaj situantas ege alte sur arbo, foje je ĉirkaŭ 12 m supergrunde, sur ĉefa forko ĉe rivero. La ino demetas ofte 2 ovojn kies kovada periodo estas nesciata.

Manĝo

Tiu akcipitro ĉasas kaj manĝas arbarajn birdojn (ĉefe kaprimulgojn), sed ankaŭ malgrandajn mamulojn (ekzemple lemurojn). Ŝajne ili ĉasas ankaŭ kortobirdojn ĉe vilaĝoj.

Referencoj

  • Birds of Africa South of the Sahara, Ian Sinclair kaj Peter Ryan
  • Birds of Prey of Africa and its Islands, Alan kaj Meg Kemp
  • Raptors of the World, a field guide, Ferguson-Lees James kaj Christie David
  • Vol. 2 - Handbook of the Birds of the World, Josep del Hoyo-Andrew Elliot—Jordi Sargatal
  • Avibase, Lepage Denis
  • Global Raptor Information Network
  • En la franca
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Hensta akcipitro: Brief Summary ( Esperanto )

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La Hensta akcipitro (Accipiter henstii) estas taga rabobirdo el familio de Akcipitredoj kiu inkludas ankaŭ multajn aliajn tagajn rabobirdojn kiel agloj, buteoj kaj cirkuoj.

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Accipiter henstii ( Spanish; Castilian )

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El azor malgache[2]​ o azor de Henst[3]​ (Accipiter henstii) es una especie de ave accipitriforme de la familia Accipitridae.

Es endémica de Madagascar. Su hábitat natural son los bosques secos, bosques húmedos de tierras bajas, bosques montanos y plantaciones.

Está amenazada por pérdida de hábitat.

Referencias

  1. BirdLife International (2012). «Accipiter henstii». Lista Roja de especies amenazadas de la UICN 2012.2 (en inglés). ISSN 2307-8235. Consultado el 21 de mayo de 2013.
  2. Bernis, F; De Juana, E; Del Hoyo, J; Fernández-Cruz, M; Ferrer, X; Sáez-Royuela, R; Sargatal, J (1994). «Nombres en castellano de las aves del mundo recomendados por la Sociedad Española de Ornitología (Segunda parte: Falconiformes y Galliformes)». Ardeola. Handbook of the Birds of the World (Madrid: SEO/BirdLife) 41 (2): 183-191. ISSN 0570-7358. Consultado el 21 de mayo de 2013.
  3. «Azor Malgache (Accipiter henstii) (Schlegel, 1873)». avibase. Consultado el 21 de mayo de 2013.

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Accipiter henstii: Brief Summary ( Spanish; Castilian )

provided by wikipedia ES

El azor malgache​ o azor de Henst​ (Accipiter henstii) es una especie de ave accipitriforme de la familia Accipitridae.

Es endémica de Madagascar. Su hábitat natural son los bosques secos, bosques húmedos de tierras bajas, bosques montanos y plantaciones.

Está amenazada por pérdida de hábitat.

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Accipiter henstii ( Basque )

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Accipiter henstii Accipiter generoko animalia da. Hegaztien barruko Accipitridae familian sailkatua dago.

Erreferentziak

  1. (Ingelesez)BirdLife International (2012) Species factsheet. www.birdlife.org webgunetitik jaitsia 2012/05/07an
  2. (Ingelesez) IOC Master List

Ikus, gainera

(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Accipiter henstii: Brief Summary ( Basque )

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Accipiter henstii Accipiter generoko animalia da. Hegaztien barruko Accipitridae familian sailkatua dago.

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Madagaskarinkanahaukka ( Finnish )

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Madagaskarinkanahaukka (Accipiter henstii) on haukkojen heimoon kuuluva lintu. Sitä tavataan Madagaskarilla kaikkialla paitsi lounaisilla alueilla, mutta se on harvinainen esiintymisalueellaan, joskin kaikilla tutkituilla riittävän suurilla metsäalueilla sitä on havaittu. Määräksi on arvioitu 1 000–3 000 yksilöä.[1]

Sen elinpiiriä ovat subtrooppiset ja trooppiset kuivat ja kosteat alavat ja vuoristometsät, kuivat savannit ja viljelmät.[1] Sen keskimääräinen paino on 1 050 grammaa.[3]

Lähteet

  1. a b c BirdLife International: Accipiter henstii IUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 12.5.2014. (englanniksi)
  2. Integrated Taxonomic Information System (ITIS): Accipiter henstii (TSN 175326) itis.gov. Viitattu 4.6.2012. (englanniksi)
  3. Birdlife.org viitattu 4.6.2012 (englanniksi)
Tämä lintuihin liittyvä artikkeli on tynkä. Voit auttaa Wikipediaa laajentamalla artikkelia.
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Madagaskarinkanahaukka: Brief Summary ( Finnish )

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Madagaskarinkanahaukka (Accipiter henstii) on haukkojen heimoon kuuluva lintu. Sitä tavataan Madagaskarilla kaikkialla paitsi lounaisilla alueilla, mutta se on harvinainen esiintymisalueellaan, joskin kaikilla tutkituilla riittävän suurilla metsäalueilla sitä on havaittu. Määräksi on arvioitu 1 000–3 000 yksilöä.

Sen elinpiiriä ovat subtrooppiset ja trooppiset kuivat ja kosteat alavat ja vuoristometsät, kuivat savannit ja viljelmät. Sen keskimääräinen paino on 1 050 grammaa.

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Autour de Henst ( French )

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Accipiter henstii

L'Autour de Henst (Accipiter henstii) est une espèce d'oiseaux appartenant au groupe des rapaces et à la famille des Accipitridae.

Description

Ce rapace diurne mesure de 52 à 62 cm, la femelle étant plus grande que le mâle.

Sa tête est brun noir avec deux légers sourcils blanc. Son menton et sa gorge blancs sont barrés de brun. Son bec est noir avec des cires jaunes. Les parties supérieures du corps sont bunes et les inférieures blanches fortement barrées de brun tandis que les ailes sont noires. Les pattes sont jaunes. La queue brune est marquée de cinq ou six bandes noires dessus tandis qu'elle est brun gris uniforme dessous.

L'immature diffère de l'adulte par les parties inférieures beiges ponctuées de grosses taches brunes.

Répartition

Cet oiseau est endémique de Madagascar.

Voir aussi

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Autour de Henst: Brief Summary ( French )

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Accipiter henstii

L'Autour de Henst (Accipiter henstii) est une espèce d'oiseaux appartenant au groupe des rapaces et à la famille des Accipitridae.

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Accipiter henstii ( Italian )

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L'astore di Henst (Accipiter henstii (Schlegel, 1873)) è un uccello rapace della famiglia degli Accipitridi endemico del Madagascar[2].

Descrizione

Dimensioni

Misura 52-62 cm di lunghezza, per un peso di circa 609 g nel maschio e di 960-1140 g nella femmina; l'apertura alare è di 86-100 cm[3].

Aspetto

Gli astori di Henst si distinguono per il sopracciglio chiaro, il becco largo, le corte ali arrotondate, la lunga coda, le lunghe zampe e i piedi potenti. Nonostante abbiano ali più corte e zampe più allungate, hanno piumaggio, dimensioni e sagoma abbastanza simili a quelli dell'astore comune. I sessi sono identici, ma la femmina è più grande del 12-20%. I giovani si distinguono facilmente dagli adulti per il piumaggio più marrone.

Negli adulti, le parti superiori sono bruno-ardesia scuro. Il sopracciglio è formato da una successione di macchie chiare e le bande caudali scure sono relativamente discrete. Le parti inferiori sono bianche con barre nerastre molto sottili ma numerose. Nella femmina, le barre sono più grossolane. L'iride è gialla. La cera è giallo-verdastra, i piedi gialli. Nei giovani, le piume delle parti superiori sono marrone chiaro con bordi camoscio-rossastri. Il sopracciglio è più chiaro. Le bande caudali scure sono molto larghe, e ciò riduce il marrone intermedio a sottili barre. Le parti inferiori variano dal bianco al rosso chiaro, con abbondanti macchie e striature marroni. I giovani hanno l'iride più chiara degli adulti[3].

Voce

Quando sono nei pressi del nido, gli adulti sono rumorosi. Il loro grido principale è un kuh-ee kuh-ee kuh-ee kuh-ee che emettono regolarmente quando sono appollaiati. Questo grido può essere l'equivalente del richiamo di annuncio lanciato da altre specie del genere Accipiter. È possibile udire anche un cac-cac-cac rude che serve senza dubbio da conversazione durante il periodo nuziale. Gli astori vengono più spesso uditi che avvistati[3].

Biologia

Gli astori di Henst vivono spesso in coppia, anche al di fuori della stagione riproduttiva. A quanto sembra, presso questi uccelli le parate aeree giocano un ruolo importante nella formazione della coppia, nel rafforzamento dei legami coniugali e nella marcatura del territorio. Nel mese di settembre, come preambolo al periodo di nidificazione, essi si impegnano infatti in voli circolari molto alti nel cielo. Effettuano ugualmente voli planati in comune, e voli ondulatori che disegnano le stesse traiettorie a forma di montagne russe di quelli degli astori comuni.

Gli astori di Henst trascorrono lunghi periodi sui loro posatoi, sia all'interno della chioma degli alberi che su un ramo ben esposto lungo un sentiero nella foresta. Questo punto elevato viene probabilmente usato come osservatorio per praticare la caccia alla posta, che sembra essere uno dei loro metodi preferiti per catturare le prede. Queste ultime vengono spesso catturate sul terreno. Tuttavia, alcune di loro vengono afferrate dopo un frenetico inseguimento attraverso la foresta[3].

Alimentazione

Gli astori di Henst cacciano soprattutto uccelli di foresta (in particolare i succiacapre), ma anche piccoli mammiferi (ad esempio i lemuri). A quanto sembra, effettuano razzie anche nei cortili in prossimità dei villaggi per impadronirsi dei polli[3].

Riproduzione

La stagione di nidificazione ha luogo probabilmente da ottobre a febbraio. Il nido viene costruito con grandi pezzi di legno ed è rivestito con foglie verdi. Questa grande struttura, che misura tra 80 e 150 cm di diametro, è situata abbastanza in alto sugli alberi, spesso a circa 12 metri al di sopra del suolo, su una biforcazione principale che sovrasta il corso di un fiume. La covata comprende abitualmente 2 uova delle quali ignoriamo la durata di incubazione. Anche la durata di permanenza dei giovani nel nido è sconosciuta[3].

Distribuzione e habitat

Gli astori di Henst frequentano principalmente le foreste primarie, sia umide che secche. Tuttavia, si trovano anche nei boschi in corso di rigenerazione, nelle savane arbustive e lungo i corsi d'acqua contornati da alberi. Generalmente, prediligono le zone inviolate o quelle che hanno subito danni minimi, ma questo non impedisce loro di stabilirsi nelle vaste piantagioni di eucalipti e persino di nidificarvi. Occasionalmente, effettuano incursioni in spazi aperti. Gli astori di Henst vivono dal livello del mare fino a circa 1800 metri di altitudine.

Gli astori di Henst sono endemici del Madagascar. Il loro areale copre il nord dell'isola, tutta la costa orientale fino a Ranomafana e la costa occidentale fino a 21 gradi di latitudine sud. Questi uccelli sono assenti dall'interno dell'isola. La specie è monotipica, vale a dire non è suddivisa in sottospecie[3].

Conservazione

L'areale della specie copre metà della superficie del Madagascar, circa 300.000 chilometri quadrati. Nonostante questo vasto territorio, la specie è considerata rara e prossima alla minaccia. Avvistare un astore di Henst è quasi un privilegio: una missione naturalistica riuscì ad avvistarne solamente due nel corso di 18 mesi. Gli effettivi di questo rapace estremamente discreto sono senza dubbio molto sottostimati. Malgrado frequentino habitat inviolati e lontani dall'uomo, questi rapaci sono stimati ad alcune centinaia di esemplari, tutt'al più ad un numero ridotto di migliaia. La continua deforestazione in Madagascar costituisce un pericolo per il loro avvenire[1].

Note

  1. ^ a b (EN) BirdLife International 2016, Accipiter henstii, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.
  2. ^ (EN) Gill F. and Donsker D. (eds), Family Accipitridae, in IOC World Bird Names (ver 9.2), International Ornithologists’ Union, 2019. URL consultato il 9 maggio 2014.
  3. ^ a b c d e f g (EN) Henst's Goshawk (Accipiter henstii), su hbw.com. URL consultato il 26 settembre 2018.

Bibliografia

  • Morris P. & Hawkins F., Birds of Madagascar: A Photographic Guide, Mountfield, UK, Pica Press, 1998, p.316, ISBN 1-873403-45-3.

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Accipiter henstii: Brief Summary ( Italian )

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L'astore di Henst (Accipiter henstii (Schlegel, 1873)) è un uccello rapace della famiglia degli Accipitridi endemico del Madagascar.

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Madagaskarhavik ( Dutch; Flemish )

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Vogels

De madagaskarhavik (Accipiter henstii) is een roofvogel uit de familie van de havikachtigen (Accipitridae).

Verspreiding en leefgebied

Het is een endemische soort uit Madagaskar.

Bronnen, noten en/of referenties
Geplaatst op:
24-11-2012
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Madagaskarhavik: Brief Summary ( Dutch; Flemish )

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De madagaskarhavik (Accipiter henstii) is een roofvogel uit de familie van de havikachtigen (Accipitridae).

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Accipiter henstii ( Portuguese )

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Accipiter henstii é uma espécie de ave de rapina da família Accipitridae.

É endémica de Madagáscar.

Os seus habitats naturais são: florestas secas tropicais ou subtropicais, florestas subtropicais ou tropicais húmidas de baixa altitude, regiões subtropicais ou tropicais húmidas de alta altitude e plantações.[1]

Está ameaçada por perda de habitat.[1]

Referências

  1. a b c BirdLife International (2004). Accipiter henstii (em inglês). IUCN 2006. Lista Vermelha de Espécies Ameaçadas da IUCN de 2006 . Página visitada em 06.11.2007.
  • (em francês) Langrand O. (1995) Guide des Oiseaux de Madagascar. Delachaux & Niestlé, Lausanne, Paris, 415 p.

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Accipiter henstii: Brief Summary ( Portuguese )

provided by wikipedia PT

Accipiter henstii é uma espécie de ave de rapina da família Accipitridae.

É endémica de Madagáscar.

Os seus habitats naturais são: florestas secas tropicais ou subtropicais, florestas subtropicais ou tropicais húmidas de baixa altitude, regiões subtropicais ou tropicais húmidas de alta altitude e plantações.

Está ameaçada por perda de habitat.

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Madagaskarduvhök ( Swedish )

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Madagaskarduvhök[2] (Accipiter henstii) är en fågel i familjen hökartade rovfåglar inom ordningen hökfåglar.[3]

Utbredning

Fågelns utbredningsområde utgörs av skogar och savannMadagaskar.[3]

Status

IUCN kategoriserar arten som nära hotad.[1]

Namn

Fågelns svenska och vetenskapliga artnamn hedrar Gideon van der Henst, holländsk upptäcktsresande och samlare av specimen på Madagaskar.[4]

Noter

  1. ^ [a b] Birdlife International 2012 Accipiter henstii Från: IUCN 2015. IUCN Red List of Threatened Species. Version 2015.4 www.iucnredlist.org. Läst 2016-02-01.
  2. ^ Sveriges ornitologiska förening (2017) Officiella listan över svenska namn på världens fågelarter, läst 2017-08-14
  3. ^ [a b] Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2015) The eBird/Clements checklist of birds of the world: Version 2015 http://www.birds.cornell.edu/clementschecklist/download, läst 2016-02-11
  4. ^ Jobling, J. A. (2016). Key to Scientific Names in Ornithology. Ur del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (red.) (2016). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. Hämtad från www.hbw.com.

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Madagaskarduvhök: Brief Summary ( Swedish )

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Madagaskarduvhök (Accipiter henstii) är en fågel i familjen hökartade rovfåglar inom ordningen hökfåglar.

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Ó Henst ( Vietnamese )

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Accipiter henstii là một loài chim trong họ Accipitridae.[1]

Chú thích

  1. ^ Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson (2012). “The eBird/Clements checklist of birds of the world: Version 6.7.”. Truy cập ngày 19 tháng 12 năm 2012.

Tham khảo


Hình tượng sơ khai Bài viết Bộ Ưng này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Ó Henst: Brief Summary ( Vietnamese )

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Accipiter henstii là một loài chim trong họ Accipitridae.

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