Rhabdotorrhinus
- Wrinkled Hornbill Rhabdotorrhinus corrugatus
A lowland-forest hornbill known for the male's red wrinkled casque; it often feeds on fruit in the canopy.
- Sulawesi Hornbill Rhabdotorrhinus exarhatus
This Sulawesi hornbill has a pale, yellow-stained face in males and black plumage in females. Fruit is its main food.
- Writhed Hornbill Rhabdotorrhinus leucocephalus
The Writhed Hornbill is a Philippine hornbill whose males and females differ in head and neck color. It feeds on fruit high in the canopy of lowland forest.
- Rufous-headed Hornbill Rhabdotorrhinus waldeni
The Rufous-headed Hornbill is a large hornbill of island forests. Males with rufous heads look different from black-headed females.
- Rufous-headed Hornbill Rhabdotorrhinus waldeni
The Rufous-headed Hornbill is a large hornbill of island forests. Males with rufous heads look different from black-headed females.
- Wrinkled Hornbill Rhabdotorrhinus corrugatus
A lowland-forest hornbill known for the male's red wrinkled casque; it often feeds on fruit in the canopy.
- Sulawesi Hornbill Rhabdotorrhinus exarhatus
This Sulawesi hornbill has a pale, yellow-stained face in males and black plumage in females. Fruit is its main food.
- Writhed Hornbill Rhabdotorrhinus leucocephalus
The Writhed Hornbill is a Philippine hornbill whose males and females differ in head and neck color. It feeds on fruit high in the canopy of lowland forest.