Aceros

Taxobox
name = "Aceros"

---

image_caption = "Aceros corrugatus"
regnum = Animalia
phylum = Chordata
classis = Aves
ordo = Coraciiformes
familia = Bucerotidae
genus = "Aceros"
genus_authority = Hodgson, 1844
subdivision_ranks = Species
subdivision = "See text."
synonyms =

"Aceros" is a genus of large south-east Asian hornbills (Bucerotidae family). This genus sometimes includes all species generally placed in the genus "Rhyticeros". Alternatively, "Aceros" has been considered monotypic, only including the Rufous-necked Hornbill, in which case all of the remaining are moved to the "Rhyticeros".

Among the species generally included in "Aceros", the Rufous-necked Hornbill is unique in that it lacks a conspicuous casque, and its bill is mainly dull yellowish. All other species generally placed in "Aceros" have a relatively high casque and brightly coloured bills.

pecies

As generally recognized, the following species belong in "Aceros":

* Rufous-necked Hornbill, "Aceros nipalensis"
* Knobbed (or Sulawesi Wrinkled) Hornbill, "Aceros cassidix"
* Wrinkled Hornbill, "Aceros corrugatus"
* Writhed Hornbill, "Aceros leucocephalus"
* Rufous-headed (or Walden's) Hornbill, "Aceros waldeni"

An undescribed extinct species occurred on Lifou in the Loyalty Islands until at least some 30.000 years ago (Steadman, 2006). Additionally, the White-crowned Hornbill is sometimes placed in this genus, but most now place it in "Berenicornis" instead.

References

* Kemp, A. C. (2001). Family Bucerotidae (Hornbills). Pp. 436-523 in: del Hoyo, J., Elliott, A., & Sargatal, J. eds. (2001). "Handbook of the Birds of the World." Vol. 6. Mousebirds to Hornbills. Lynx Edicions, Barcelona. ISBN 84-87334-30-X
* Steadman, David William (2006): "Extinction and Biogeography of Tropical Pacific Islands Birds". University of Chicago Press. ISBN 0-226-77142-3.