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Writhed-billed Hornbill

Rhabdotorrhinus waldeni (Sharpe, RB 1877)

Walden's hornbill locally called dulungan, also known as the Visayan wrinkled hornbill, rufous-headed hornbill or writhed-billed hornbill, is a critically endangered species of hornbill living in the rainforests on the islands of Negros and Panay in the Philippines. It is closely related to the writhed hornbill, but can be recognized by the yellow throat and ocular skin in the male, and the blue throat and ocular skin in the female. Its binomial name commemorates the Scottish ornithologist Viscount Walden. Source: Wikipedia




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Classification
Order:
  Bucerotiformes
Family:
  Bucerotidae
Genus:
   Rhabdotorrhinus
Scientific:
  Rhabdotorrhinus waldeni

Original description

Citation:
  (Sharpe, RB 1877)

Reference:
   J. Linn. Soc. Zool. 13 p.156

Protonym:
  Craniorrhinus waldeni

Type locality:
  Mountains west of Ilo Ilo, Panay.

Link:
  https://biodiversitylibrary.org/page/31597414

Avibase identifiers

Avibase ID:
  522A2DFD819AA95D

Avibase ID:
  avibase-522A2DFD

Short link:
  https://avibase.ca/522A2DFD

Taxonomic Serial Number:
  TSN: 554440


CRITICALLY ENDANGERED

Geographic range:

  • Rhabdotorrhinus waldeni: central Philippines (Panay, Guimaras, and Negros)
Source: Clements checklist
English:
Writhed-billed Hornbill
Catalan:
Calau de Walden
Czech:
zoborožec žlutobradý
Danish:
Panayrynkenæb
German:
Waldenhornvogel
Spanish:
Cálao Grande de Panay
Spanish (Spain):
Cálao grande de Panay
Finnish:
visayasinsarvinokka
French:
Calao de Walden
Croatian:
riđoglavi kljunorožac
Hungarian:
vörösnyakú szarvascsőrű
Icelandic:
Krumphorni
Italian:
Bucero beccorugoso
Japanese (romaji):
akagashirasaichou
Japanese:
アカガシラサイチョウ
Lithuanian:
Rusvagalvis aceras
Dutch:
Waldens Jaarvogel
Norwegian Nynorsk:
Negroshornfugl
Norwegian:
Negroshornfugl
Polish:
dzioborożec kasztanowogłowy
Portuguese:
calau-de-panai
Portuguese (Portugal):
calau-de-panay
Russian:
Рыжеголовый калао
Slovak:
zobákorožec hnedohlavý
Swedish:
Waldens näshornsfågel
Ukrainian:
Калао негроський
Chinese:
扭嘴犀鸟
Chinese (Traditional):
皺嘴皺盔犀鳥

Authorities recognizing this taxonomic concept:

Avibase taxonomic concepts (current):
Writhed-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Avibase taxonomic concepts v. 2023 (May 2023):
Writhed-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Avibase taxonomic concepts v. 2024 (Oct 2024):
Writhed-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Avibase taxonomic concepts v. 01 (August 2013):
Writhed-billed Hornbill ( Aceros waldeni) [version 1]
Avibase taxonomic concepts v. 02 (May 2014):
Writhed-billed Hornbill ( Aceros waldeni) [version 1]
Avibase taxonomic concepts v. 03 (March 2015):
Writhed-billed Hornbill ( Rhyticeros waldeni) [version 1]
Avibase taxonomic concepts v. 04 (Aug 2016):
Writhed-billed Hornbill ( Rhyticeros waldeni) [version 1]
Avibase taxonomic concepts v. 05 (Jan 2017):
Writhed-billed Hornbill ( Rhyticeros waldeni) [version 1]
Avibase taxonomic concepts v. 06 (Feb 2018):
Writhed-billed Hornbill ( Rhyticeros waldeni) [version 1]
Avibase taxonomic concepts v. 07 (Feb 2020):
Writhed-billed Hornbill ( Rhyticeros waldeni) [version 1]
Avibase taxonomic concepts v. 08 (Feb 2021):
Writhed-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Birdlife checklist version 00:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 01:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 02:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 03:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 04:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 05 (Jun 2012):
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 05.1 (Oct 2012):
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 06 (Nov 2013):
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 06.1 (Feb 2014):
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Birdlife checklist version 07 (Jul 2014):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Birdlife checklist version 08 (Oct 2015):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Birdlife checklist version 09 (Dec 2016):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Birdlife checklist version 09.1 (Jun 2017):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v2 (Dec 2017):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v3 (Nov 2018):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v4 (Dec 2019):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v5 (Dec 2020):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v6 (Dec 2021):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v6b (Jul 2022):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v7 (Dec 2022):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v8 (Dec 2023):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
HBW and BirdLife Taxonomic Checklist v9 (Oct 2024):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Commission internationale pour les noms français des oiseaux (1993, révision 2009):
Calao de Walden ( Aceros waldeni) [version 1]
Commission internationale pour les noms français des oiseaux (1993):
Calao de Walden ( Aceros waldeni) [version 1]
Clements, version 2021:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2022:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2023:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2024:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements 4th edition:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (as published):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2000 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2001 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2002 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2003 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2004 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 5th edition (incl. 2005 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (incl. 2007 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (incl. 2008 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (incl. 2009 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (version 6.5 incl. 2010 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (version 6.6 incl. 2011 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (version 6.7 incl. 2012 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (version 6.8 incl. 2013 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements 6th edition (version 6.9 incl. 2014 revisions):
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
Clements, version 2015:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2016:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2017:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2018:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Clements, version 2019:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 1.50:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
eBird version 1.52:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
eBird version 1.53:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
eBird version 1.54:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
eBird version 1.55:
Writhe-billed Hornbill ( Aceros waldeni) [version 1]
eBird version 2015:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2016:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2017:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2018:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2019:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2021:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2022:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2023:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
eBird version 2024:
Writhe-billed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Howard and Moore 2nd edition:
Aceros leucocephalus waldeni [version 1]
Howard and Moore 2nd edition (incl. ? suppl):
Writhed-billed Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (as published):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 1.2):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 2.1):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 3.1):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 4):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 5):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 6):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 7):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 3rd edition (incl. corrigenda 8):
Walden's Hornbill ( Aceros waldeni) [version 1]
Howard and Moore 4th edition (vol. 1-2):
Walden's Hornbill ( Rhyticeros waldeni) [version 1]
Howard and Moore 4th edition (incl. corrigenda vol.1-2):
Walden's Hornbill ( Rhyticeros waldeni) [version 1]
Handbook of the Birds of the World (vol 1-16):
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Handbook of the Birds of the World Alive (31/01/2015):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Handbook of the Birds of the World Alive (03/07/2017):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Handbook of the Birds of the World and Birdlife (Dec 2017):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Handbook of the Birds of the World and Birdlife (Dec 2018):
Rufous-headed Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 1.0:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 1.1:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 1.5:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 1.6:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 1.7:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.0:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.1:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.2:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.3:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.4:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.5:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.6:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.7:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.8:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.9:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.10:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 2.11:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 3.1:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 3.2:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 3.3:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 3.4:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 3.5:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 4.1:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 4.2:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 4.3:
Walden's Hornbill ( Aceros waldeni) [version 1]
IOC World Bird Names, version 4.4:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 5.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 5.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 5.3:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 5.4:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 6.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 6.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 6.3:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 6.4:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 7.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 7.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 7.3:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 8.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 8.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 9.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 9.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 10.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 10.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 11.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 11.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 12.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 12.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 13.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 13.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 14.1:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
IOC World Bird Names, version 14.2:
Walden's Hornbill ( Rhabdotorrhinus waldeni) [version 1]
Oriental Bird Club:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Peters' Check-list of the Birds (original):
Aceros leucocephalus waldeni [version 1]
Peters' Check-list of the Birds (2nd edition):
Aceros leucocephalus waldeni [version 1]
Sibley and Monroe (1993):
Writhed-billed Hornbill ( Aceros waldeni) [version 1]
Sibley and Monroe (1993, including corrections up to 1998):
Writhed-billed Hornbill ( Aceros waldeni) [version 1]
Sibley and Monroe, Birds of the World Version 2.0:
Rufous-headed Hornbill ( Aceros waldeni) [version 1]
Zoonomen - Zoological Nomenclature Resource:
Aceros waldeni [version 1]
Zoonomen - Zoological Nomenclature Resource:
Aceros waldeni [version 1]

Taxonomic status:

Species status: full species (sometimes a subspecies)

This taxon is considered a subspecies of Rhabdotorrhinus [leucocephalus or waldeni] (sensu lato) by some authors

Your sightings

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Related taxa

Highlight taxa in a checklist (shown in red)

Other synonyms

See also the taxonomic synonyms table.


Bengali: রুপুয়঳ ভাথামুক্ত ধমন঱
Bengali (transliteration): ruphuẏasa māthāyukta dhanēśa
Catalan: Calau de Walden
Czech: zoborožec žlutobradý
Danish: Panayrynkenæb
German: Waldenhornvogel
English: Panay Wrinkled Hornbill, Rufous-headed Hornbill, Visayan Wrinkled Hornbill, Walden's Hornbill, Writhe-billed Hornbill, Writhed billed Hornbill, Writhed-billed Hornbill
English, HBW: Rufous-headed Hornbill
English (IOC): Walden's Hornbill
English (United States): Writhe-billed Hornbill
Spanish: Cálao de Pico Torcido, Cálao Grande de Panay
Spanish (Spain): Cálao grande de Panay
Spanish (HBW): Writhe-billed Hornbill
Estonian: panay sarvlind
Finnish: Visayasinsarvinokka
French: Calao à bec tordu, Calao de Walden
Croatian: riđoglavi kljunorožac
Hungarian: vörösnyakú szarvascsőrű
Icelandic: Krumphorni
Italian: Bucero beccorugoso, Bucero testarossiccia
Japanese (romaji): akagashirasaichou, akahashisaichou
Japanese: アカガシラサイチョウ, アカハシサイチョウ
Scientific: Aceros leucocephalus waldeni, Aceros waldeni, Craniorrhinus [sic] waldeni, Craniorrhinus waldeni, Cranorrhinus waldeni, Rhabdotorrhinus waldeni, Rhyticeros waldeni
Lithuanian: Rusvagalvis aceras
Dutch: Visayanjaarvogel, Waldens Jaarvogel
Norwegian Nynorsk: Negroshornfugl
Norwegian: Negroshornfugl
Polish: dzioborozec kasztanowoglowy, dzioborożec kasztanowogłowy
Portuguese: calau-de-panai
Portuguese (Portugal): calau-de-panay
Russian: Калао Валдена, Рыжеголовый калао
Slovak: zobákorožec hnedohlavý
Swedish: Visayahornkorp, Waldens näshornsfågel
Turkish: Walden boynuzgagası
Ukrainian: Калао негроський
Chinese: 扭嘴犀鸟
Chinese (Traditional): 皺嘴皺盔犀鳥

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