Tockus

Trivial name	Latin name
African grey hornbill	Tockus nasutus
Southern Yellow-billed Hornbill	Tockus leucomelas
Jackson's hornbill	Tockus jacksoni
Eastern Yellow-billed Hornbill	Tockus flavirostris
Red-billed Hornbill	Tockus erythrorhynchus
Monteiro's Hornbill	Tockus monteiri
Bradfield's Hornbill	Tockus bradfieldi
Von der Decken's Hornbill	Tockus deckeni

comparison of wing and tail configuration¹

¹ According to Hartmann (2000a, 2000b and 2016)