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As with other hornbills, the knobbed hornbill is believed to be monogamous. Its diet consists mainly of fruits, but it will also take insects and small vertebrates. Breeding season spans 27–30 weeks and appears to be triggered by a dramatic reduction in rainfall. The female seals itself inside a tree
291:, white tail feathers, pale blue skin around eye, blackish feet and bare dark blue throat. The male has rufous/buff face and neck, orange-red eyes, and a high red casque on the top of his bill. The female has a black face and neck, a yellow casque, and brownish eyes.
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Knobbed hornbills are important seed dispersers in their habitat and influence the initial fate of seeds of several tropical forest tree species.
343:
hole for egg-laying using its own feces. During this time, the male will provide foods for the female and the young through a slit in the seal.
326:. It inhabits evergreen forest at an elevation of up to 1,800 m and also makes use of secondary forest, woodland and plantations for foraging.
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Kinnaird, M. F. (1998). "Evidence for effective seed dispersal by the
Sulawesi red-knobbed hornbill, Aceros cassidix".
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from logging (since they depend on large and mature trees for breeding) and to some extent by hunting.
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A pair (female on left) in the forest canopy
Tangkoko Nature Reserve, Sulawesi
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Josep del Hoyo; Andrew
Elliott; David Christie, eds. (2010).
362:. Despite being locally very common, they are threatened by
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483:10.2305/IUCN.UK.2017-3.RLTS.T22682525A117182222.en
261:. The species is sometimes placed in the genus
397:Natuurkundige Commissie voor Nederlands-Indië
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354:The species is currently classified as
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395:Early drawing by the Dutch colonial
469:IUCN Red List of Threatened Species
420:Pair at Walsrode Bird Park, Germany
306:, the knobbed hornbill is found in
560:10.1111/j.1744-7429.1998.tb00368.x
533:Handbook of the Birds of the World
14:
853:IUCN Red List vulnerable species
425:
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458:BirdLife International (2017).
267:. The knobbed hornbill is the
1:
535:. Barcelona: Lynx Edicions.
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863:Endemic birds of Indonesia
383:Male at Walsrode Bird Park
251:Sulawesi wrinkled hornbill
476:: e.T22682525A117182222.
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92:Scientific classification
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295:Distribution and habitat
868:Birds described in 1823
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283:This is a large black
332:
505:"Appendices | CITES"
776:Rhyticeros-cassidix
622:Rhyticeros cassidix
592:Rhyticeros cassidix
462:Rhyticeros cassidix
364:habitat destruction
246:Rhyticeros cassidix
201:Rhyticeros cassidix
45:Conservation status
335:
840:
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758:Open Tree of Life
584:Taxon identifiers
253:, is a colourful
249:), also known as
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24:Knobbed hornbill
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788:Buceros cassidix
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241:knobbed hornbill
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183:R. cassidix
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636:Aceros_cassidix
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16:Species of bird
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512:. Retrieved
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350:Conservation
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719:iNaturalist
616:Wikispecies
489:19 November
324:Muna Island
279:Description
159:Bucerotidae
78:Appendix II
858:Rhyticeros
847:Categories
771:Xeno-canto
548:Biotropica
514:2022-01-14
438:References
356:vulnerable
301:Indonesian
275:province.
257:native to
170:Rhyticeros
60:Vulnerable
803:Q27947497
607:Q27074824
509:cites.org
259:Indonesia
177:Species:
115:Kingdom:
109:Eukaryota
830:12076949
797:Wikidata
737:22682525
662:22682525
657:BirdLife
601:Wikidata
568:84282134
432:Skeleton
399:, 1820s.
308:Sulawesi
285:hornbill
255:hornbill
218:Synonyms
209:Temminck
155:Family:
129:Chordata
125:Phylum:
119:Animalia
105:Domain:
65:IUCN 3.1
763:6150877
711:8290357
698:knohor1
672:knohor1
644:Avibase
370:Gallery
358:by the
338:Ecology
304:endemic
211:, 1823)
165:Genus:
145:Order:
135:Class:
80: (
63: (
724:514334
566:
320:Togian
316:Lembeh
264:Aceros
817:8VN6V
750:70974
693:eBird
685:8VDT7
669:BOW:
564:S2CID
312:Buton
82:CITES
76:CITES
825:GBIF
732:IUCN
706:GBIF
491:2021
474:2017
360:IUCN
333:Male
322:and
289:bill
239:The
139:Aves
812:CoL
680:CoL
631:ADW
556:doi
478:doi
299:An
271:of
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243:(
207:(
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67:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
