| Oriental Pied Hornbill |
Coraciiformes |
Bucerotidae |
Anthracoceros |
albirostris |
Kinabatangan River, Borneo |
| African Grey Hornbill |
Coraciiformes |
Bucerotidae |
Tockus |
nasutus |
Ol Kinyei Conservancy, Kenya |
| Red-billed Hornbill |
Bucerotiformes |
Bucerotidae |
Tockus |
erythrorhynchus |
Selenkay Conservancy, Kenya |
| Von der Deckens Hornbill |
Coraciiformes |
Bucerotidae |
Tockus |
deckeni |
Selenkay Conservancy, Kenya |