White-crowned hornbill

The white-crowned hornbill (Berenicornis comatus), also known as the long-crested hornbill or white-crested hornbill (leading to easy confusion with the African white-crested hornbill), is a species of hornbill.

White-crowned hornbill
Male
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Bucerotiformes
Family: Bucerotidae
Genus: Berenicornis
Bonaparte, 1850
Species:
B. comatus
Binomial name
Berenicornis comatus
(Raffles, 1822)
Synonyms
  • Aceros comatus

Taxonomy

It is monotypic within the genus Berenicornis, although rarely the white-crested hornbill is also included in this genus, and the white-crowned hornbill is sometimes placed in genus Aceros instead.[2]

Description
Berenicornis comatus. Close-up on the heads of male (right) and female (left)

Berenicornis comatus is a large hornbill, reaching a length of 83–102 centimetres (33–40 in) and a weight of 1.3–1.5 kilograms (2.9–3.3 lb). Females are smaller than males. The plumage is black and white. The head, neck, breast and tail are white, while the remaining plumage is black. It has a white crown feathers erected in a crest (hence the common name). Between the eye and the bill and on the throat there is bare dark blue skin. The bill is mainly black, with a yellowish base. Like most hornbills, it has a blackish casque on the top if its bill. The female has a black neck and underparts.

Diet

These birds are territorial and feed on various fruits, lizards, arthropods and larvae.[3]

Distribution

This species is found in the Malay Peninsula, Sumatra and Borneo.

Habitat

This bird inhabits rainforests at low and medium altitudes, usually at an elevation below 900 meters. It may also be found on fruit, oil-palm and rubber plantations. It is threatened by habitat destruction.

Behavior

The female lays two white eggs in a tree hole, then seals herself in by blocking the entrance to the nest with droppings, debris and mud. The male, and other adults and young forming a cooperative group, feed the breeding female and the chicks through a narrow hole. The female breaks the "wall" and leaves the nest when the chicks are able to fly.[3]

Threats

The forest habitat that this bird depends on has been heavily declining in recent years. Due to this, the white-crowned hornbill was uplisted from near threatened to endangered on the IUCN Red List in 2018.

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References
  1. BirdLife International. 2018. Berenicornis comatus. The IUCN Red List of Threatened Species 2018: e.T22682507A132272549. https://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T22682507A132272549.en. Downloaded on 19 December 2018.
  2. Clements, J. F. 2007. The Clements Checklist of Birds of the World, 6th Edition. Cornell University Press. Downloadable from Cornell Lab of Ornithology
  3. "Arkive.org". Archived from the original on 2014-05-18. Retrieved 2012-10-09.


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