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This is a list of Bucerotiformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.
This list is incomprehensive, as not all Bucerotiformes have had their numbers quantified.
| Common name | Binomial name | Population | Status | Trend | Notes | Image |
|---|---|---|---|---|---|---|
| Sulu hornbill | Anthracoceros montani | 1 – 49 [1] | CR [1] |  [1] |  | |
| Mindoro hornbill | Penelopides mindorensis | 250 - 999 [2] | EN [2] | [2] |  | |
| Narcondam hornbill | Rhyticeros narcondami | 300 - 650 [3] | VU [3] |  [3] |  | |
| Sumba hornbill | Rhyticeros everetti | 1 000 - 2 000 [4] | EN [4] | [4] | ||
| Walden's hornbill | Rhabdotorrhinus waldeni | 1,000 – 2,499 [5] | CR [5] | [5] |  | |
| Visayan hornbill | Penelopides panini | 1,200 [6] | EN [6] | [6] |  | |
| Plain-pouched hornbill | Rhyticeros subruficollis | 1,500 - 7,000 [7] | VU [7] | [7] |  | |
| Tickell's brown hornbill | Anorrhinus tickelli | 2,500 - 9,999 [8] | NT [8] | [8] |  | |
| Rufous-necked hornbill | Aceros nipalensis | 7,000 – 10,000 [9] | VU [9] | [9] |  | |
| Yellow-casqued hornbill | Ceratogymna elata | 8,000 – 9,000 [10] | VU [10] | [10] |  | |
| Great hornbill | Buceros bicornis | 13,000 - 27,000 [11] | VU [11] | [11] | Precautionary estimate. |  |
| Palawan hornbill | Anthracoceros marchei | 20,000 - 49,999 [12] | VU [12] | [12] |  | |
| Eurasian hoopoe | Upupa epops | 5,000,000 - 10,000,000 [13] | LC [13] | [13] |  | |
Hornbills are birds found in tropical and subtropical Africa, Asia and Melanesia of the family Bucerotidae. They are characterized by a long, down-curved bill which is frequently brightly coloured and sometimes has a horny casque on the upper mandible. Hornbills have a two-lobed kidney. They are the only birds in which the first and second neck vertebrae are fused together; this probably provides a more stable platform for carrying the bill. The family is omnivorous, feeding on fruit and small animals. They are monogamous breeders nesting in natural cavities in trees and sometimes cliffs. A number of mainly insular species of hornbill with small ranges are threatened with extinction, mainly in Southeast Asia.
The wreathed hornbill is an Old World tropical bird of the hornbill family Bucerotidae, also called bar-pouched wreathed hornbill due to its distinctive blue-black band on its lower throat sac. It is named after its characteristic long, curved bill that develops ridges, or wreaths, on the casque of the upper mandible in adults. Males are black with a rufous crown, a white upper breast and face, and a yellow featherless throat. Females are uniformly black with a blue throat and are slightly smaller than males.
Bucerotiformes is an order of birds that contains the hornbills, ground hornbills, hoopoes and wood hoopoes. These birds were previously classified as members of Coraciiformes. The clade is distributed in Africa, Asia, Europe and Melanesia.
Sumba hornbill, or known natively as Julang is a large bird belonging to the family of Bucerotidae, endemic and native to the Indonesian island of Sumba. The scientific name commemorates British colonial administrator and zoological collector Alfred Hart Everett.
The Palawan hornbill is a large forest bird endemic to the Philippines. It is one of the 11 endemic hornbills in the country. It is only found in Palawan and nearby islands of Balabac, Busuanga, Calauit, Culion and Coron. It is locally known as "talusi" in the language Cuyunon. It is threatened by habitat loss, hunting and trapping for the cage-bird trade.
The white-crowned hornbill, also known as the long-crested hornbill or white-crested hornbill, is a species of hornbill.
The writhed hornbill, also known as the Mindanao wrinkled hornbill, is a species of hornbill in the family Bucerotidae. It is endemic to primarily lowland forests on the Philippine islands of Mindanao, Dinagat and Camiguin Sur. It formerly included the Walden's hornbill as a subspecies, but unlike that species, both sexes of the writhed hornbill have orange-red throat and peri-ocular skin. The writhed hornbill is threatened by habitat loss and hunting.
The Narcondam hornbill is a species of hornbill in the family Bucerotidae. It is endemic to the Indian island of Narcondam in the Andamans. Males and females have a distinct plumage. The Narcondam hornbill has the smallest home range out of all the species of Asian hornbills.
The plain-pouched hornbill is a species of hornbill in the family Bucerotidae. It is found in forests of the Dawna Range and the Tenasserim Hills of southern Myanmar, adjacent parts of western Thailand and northern Peninsular Malaysia.
