386:". 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. 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.
75:
50:
31:
451:. The justification for this conservation status is the relatively small population size estimated at 1,000–2,250 individuals. With that population, the number of breeding adults is estimated to be 670-1,500 individuals. This population is estimated to be decreasing due to deforestation and human disturbance.
285:). 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.
418:
Henst's goshawk is an adept forest predator whose diet mainly consists of medium to large sized birds and mammals. 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.
405:
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
365:
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. As a top predator, large area
253:
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). There is a notable size discrepancy between males and females, with males weighing 609 g (1.343 lb) on average and the larger
357:
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.
265:
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. Juvenile colouration will vary and can be distinguished by having large brown spots on the breast and belly. A strong distinguishing feature
361:
It 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
422:
The preferred prey are lemurs and poultry that occur within primary forest habitat. The ability to hunt lemurs makes 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
389:
Both adults take part in constructing large, bulky nests within the main fork of trees. 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.
358:
Consequently, the distribution of Henst's goshawk follows that of its preferred forest habitat and is not found in the southern portion of the island. The primary forests of
Madagascar may be categorized as dry deciduous and humid evergreen, both of which are occupied by Henst's goshawk.
221:. 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
299:. This group of birds mostly consists of goshawks and sparrowhawks. They lack a procoracoid foramen (a hole at the base of procoracoid bone). This genus is within the family Accipitridae and order Accipitriformes which together make up the majority of the
397:, where the previous year's nest is re-used or another one is built only a couple of hundred meters away from the original. Site fidelity is most likely explained by the specificity of preferred nest habitat to occur in old growth forests near water.
458:
Henst's goshawk occurs in several protected areas within
Madagascar such as the Ranomafana National Park and the Tsingy de Bemaraha Strict Nature Reserve. The Madagascan Government has pledged to further protect the island’s unique biodiversity.
454:
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.
431:
The basic call is a loud, crackling and rapid "ang-ang-ang-ang...". 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.
435:
Except for the breeding season, when Henst's goshawk can be very loud and vocal. They will utter a rapid succession of "keey-keey-keey' in order to communicate with potential breeding partners.
269:
In flight, 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.
693:
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.
423:
4kg. 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.
684:
Gardner CJ, Jasper LD. 2014. Accipeter henstii(Shlegel,1873)(Falconiformed:Accipitridae): New distribution record from southwest
Madagascar. Checklist 10(1):164-165
705:
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
585:, 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.
623:
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
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353:
Henst's goshawk has a limited distribution within Madagascar due to specific habitat requirements. The preferred habitats of Henst's goshawk are
975:
230:
1042:
537:
910:
949:
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Rand AL. 1936. The distribution and habits of Madagascar birds. Bulletin of the American Museum of Natural History 72:143-500
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Olson, L.S. 1987. Variation in the Procoracoid Foramen in the Accipitridae. Rivista Italiana di Ornitologia, 57(3-4): 161-164
410:, whereby chicks within unattended nests were quickly killed and consumed by a circling harrier-hawk on multiple occasions.
254:
females weighing 960 to 1,140 g (2.12 to 2.51 lb) on average. It is one of the world's largest hawks, rivaling the
954:
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311:
226:
1062:
980:
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The goshawk will mainly hunt from a hidden perch within the forest and will rarely soar above the canopy cover.
266:
is a pale eye line on the contrasting dark head. The eyes and long legs of the species are yellow in colour.
824:
810:
513:
277:
Henst's goshawk may be easily confused with an apparent mimic species also present in Madagascar, the
837:
635:
Ferguson-Lees, James, and David A. Christie. Raptors of the world. Houghton Mifflin Harcourt, 2001.
330:
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requirements are necessary for foraging, explaining why the species occurs at low densities.
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An assessment by Birdlife International in 2016 has placed Henst's goshawk as
1036:
962:
795:
499:
448:
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146:
59:
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Handbook of the Birds of the World. Vol. 2: New World Vultures to Guineafowl
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242:
209:
205:
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Global Raptor Information Network. 2018. Species account: Henst's goshawk
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804:
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238:
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889:
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30:
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106:
747:"Henst's goshawk (Accipiter henstii) - BirdLife species factsheet"
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222:
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419:
Henst's goshawk will not leave the canopy cover while foraging.
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733:
315:
96:
538:"Henst's goshawk videos, photos and facts - Accipiter henstii"
1001:
884:
213:
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Henst's goshawk will form breeding pairs that are known as "
116:
581:
Kemp, A. C., D. A. Christie, and G. M. Kirwan (2020).
488:
406:
nest vulnerable to predation events at the hands of
345:), both of which are smaller than Henst's goshawks.
310:, a German ornithologist (who had a position at the
610:del Hoyo, J., Elliott, A. and Sargatal, J. (1994)
514:10.2305/IUCN.UK.2020-3.RLTS.T22695678A173353411.en
594:Ferguson-Lees, J., & Christie, D. A. (2001).
1034:
293:Henst's goshawk is a species within the genus
231:subtropical or tropical moist lowland forest
348:
48:
29:
512:
739:
631:
629:
393:Henst's appear to exhibit some sort of
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329:present on the island of Madagascar:
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604:
569:. Penguin Random House South Africa.
532:
530:
528:
526:
524:
312:Rijksmuseum van Natuurlijke Historie
583:Henst's Goshawk (Accipiter henstii)
500:IUCN Red List of Threatened Species
469:
306:The species was first described by
13:
717:
696:
675:
647:
572:
227:subtropical or tropical dry forest
14:
1074:
601:
567:Birds of the Indian Ocean islands
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400:
1043:IUCN Red List vulnerable species
426:
233:, subtropical or tropical moist
212:. It was formerly placed in the
73:
708:
687:
489:BirdLife International (2020).
438:
377:
638:
617:
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248:
1:
462:
734:http://www.globalraptors.org
598:. Houghton Mifflin Harcourt.
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7:
1058:Birds of prey of Madagascar
1053:Endemic birds of Madagascar
614:. Lynx Edicions, Barcelona.
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10:
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343:Accipiter madagascariensis
779:
507:: e.T22695678A173353411.
175:
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70:Scientific classification
68:
46:
37:
28:
23:
349:Distribution and habitat
279:Madagascar serpent eagle
272:
1063:Birds described in 1873
413:
339:Madagascar sparrowhawk
241:. It is threatened by
751:datazone.birdlife.org
565:Sinclair, I. (2013).
335:Tachyspiza francesiae
331:Frances's sparrowhawk
596:Raptors of the world
325:There are two other
24:Henst's goshawk
384:socially monogamous
362:for lost habitat.
355:primary rainforests
245:within Madagascar.
40:Conservation status
730:Accipiter henstii.
655:"Henst's Goshawk (
204:) is a species of
1030:
1029:
1020:Accipiter-henstii
989:Open Tree of Life
825:accipiter-henstii
811:Accipiter henstii
781:Accipiter henstii
773:Taxon identifiers
657:Accipiter henstii
493:Accipiter henstii
283:Eutriorchis astur
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544:. Archived from
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308:Hermann Schlegel
256:Eurasian goshawk
181:
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736:on 11 Oct. 2018
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303:birds of prey.
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260:Meyer's goshawk
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196:Henst's goshawk
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161:A. henstii
127:Accipitriformes
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16:Species of bird
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235:montane forest
208:in the family
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449:IUCN Red List
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427:Vocalizations
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395:site fidelity
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201:Astur henstii
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179:Astur henstii
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170:Binomial name
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550:. Retrieved
546:the original
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439:Conservation
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378:Reproduction
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322:), in 1873.
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243:habitat loss
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210:Accipitridae
206:bird of prey
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147:
137:Accipitridae
18:
924:iNaturalist
805:Wikispecies
663:www.hbw.com
249:Description
239:plantations
1037:Categories
1015:Xeno-canto
756:2018-10-11
668:2018-10-11
552:2018-10-11
463:References
445:Vulnerable
55:Vulnerable
370:Behaviour
327:Accipiter
218:Accipiter
155:Species:
93:Kingdom:
87:Eukaryota
1002:Species+
968:22695678
942:10934882
851:22695678
846:BirdLife
790:Wikidata
289:Taxonomy
223:habitats
186:Schlegel
133:Family:
107:Chordata
103:Phylum:
97:Animalia
83:Domain:
60:IUCN 3.1
916:2480600
903:1048384
890:hengos1
864:hengos1
833:Avibase
796:Q113999
447:on the
301:diurnal
143:Genus:
123:Order:
113:Class:
58: (
994:767915
981:387797
955:175326
820:ARKive
542:Arkive
337:) and
316:Leiden
237:, and
188:, 1873
1048:Astur
1007:11121
937:IRMNG
885:eBird
296:Astur
273:Mimic
214:genus
148:Astur
976:NCBI
963:IUCN
950:ITIS
929:5132
911:GBIF
877:93VC
505:2020
414:Diet
258:and
225:are
117:Aves
898:EoL
872:CoL
859:BOW
509:doi
314:in
1039::
1017::
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978::
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749:.
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318:,
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511::
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281:(
198:(
62:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
