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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.
This list follows IUCN classifications for species names. Where IUCN classifications differ from other ornithological authorities, alternative names are noted.
Some species listed as members of Bucerotiformes are extinct:
| Common name | Binomial name | Population | Status | Trend | Notes | Image |
|---|---|---|---|---|---|---|
| Sulu hornbill | Anthracoceros montani | 1 – 49 [2] | CR [2] | | ||
| Mindoro hornbill | Penelopides mindorensis | 250 - 999 [3] | EN [3] | | ||
| Narcondam hornbill | Rhyticeros narcondami | 300 - 650 [4] | VU [4] | | ||
| Sumba hornbill | Rhyticeros everetti | 1,000 - 2,000 [5] | EN [5] | | ||
| Rufous-headed hornbill (Walden's hornbill) | Rhabdotorrhinus waldeni | 1,000 - 3,000 [6] | EN [6] | Total population is estimated to be 1,500-5,000 individuals. [6] | | |
| Visayan hornbill | Penelopides panini | 1,200 [7] | EN [7] | Total population is estimated to be at least 1,800 individuals. [7] Note that IOC taxonomy splits an additional species, the Samar hornbill, from this species. [8] IUCN/BirdLife International maintain both species within P. panini. [9] || | ||
| Plain-pouched hornbill | Rhyticeros subruficollis | 2,500 - 5,000 [10] | VU [10] | Total population is estimated to be, at minimum, 4,000 individuals. [10] | | |
| Tickell's brown hornbill | Anorrhinus tickelli | 2,500 - 9,999 [11] | NT [11] | | ||
| Rufous-necked hornbill | Aceros nipalensis | 7,000 - 10,000 [12] | VU [12] | Total population is estimated to be 12,000-15,000 individuals. [12] | | |
| Malabar pied hornbill | Anthracoceros coronatus | 7,200 - 72,000 [13] | NT [13] | Best estimate for number of mature individuals is 7,200-25,000. [13] | | |
| Yellow-casqued hornbill | Ceratogymna elata | 8,000 - 9,000 [14] | VU [14] | Total population has been previously estimated as 12,533 individuals. This may be an underestimate, given the size of remaining suitable habitat. [14] | | |
| Great hornbill | Buceros bicornis | 13,000 - 27,000 [15] | VU [15] | Total population is estimated (precautionary) to be 23,000 - 71,000 individuals. [15] | | |
| Palawan hornbill | Anthracoceros marchei | 20,000 - 49,999 [16] | VU [16] | | ||
| Common hoopoe (Eurasian hoopoe) | Upupa epops | 5,000,000 - 10,000,000 [17] | LC [17] | Values given are for total population. [17] | | |