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Genus Aceros
Knobbed Hornbill - An Indonesian endemic, the Knobbed Hornbill is distributed in the tropical evergreen forests of Sulawesi, Buton, Lembeh, Togian and Muna Island.
White-crowned Hornbill - The White-crowned Hornbill , also known as the White-crested Hornbill , is a species of hornbill found in forests in the Thai-Malay Peninsula, Sumatra and Borneo. It is monotypic within the genus Berenicornis, but rarely the White-crested Hornbill is also included in this genus, whereas the White-crowned Hornbill sometimes is placed in Aceros instead.
Wrinkled Hornbill - The Wrinkled Hornbill or Sunda Wrinkled Hornbill is a medium-large hornbill which is found in forest in the Thai-Malay Peninsula, Sumatra and Borneo. It has sometimes been placed in the genus Rhyticeros together with most other species generally placed in Aceros.
Sumba Hornbill - The Sumba Hornbill is a medium-sized, approximately 70cm long, blackish hornbill. The male dark reddish-brown on crown and nape, and paler neck. The female has an entirely black plumage. Both sexes have a large dull yellowish bill with maroon patch at base, a serrated casque, and an inflatable blue throat.
Writhed Hornbill - The Mindanao Wrinkled Hornbill is threatened by habitat loss and hunting.
Narcondam Hornbill - The Narcondam Hornbill is a species of hornbill in the Bucerotidae family. It is endemic to the Indian island of Narcondam in the Andamans.
Rufous-necked Hornbill - It is currently found in Bhutan, north-east India, Burma, southern Yunnan and south-east Tibet, Nepal, China, Thailand, Laos and Vietnam. Numbers have declined dramatically, and it is estimated that there are now less than 10,000 individuals. It is the longest-bodied species of hornbill at up to more than 120 cm , but often weighs half as much as the Southern Ground-Hornbill.
Blyth's Hornbill - The Papuan Hornbill is also known as Blyth's Hornbill. Its local name in Tok Pisin is kokomo. It is a large hornbill species inhabiting the forest canopy in the Wallacea and Melanesia.
Plain-pouched Hornbill - The Plain-pouched Hornbill is a species of hornbill in the Bucerotidae family. It is found in forests in southern Burma, adjacent parts of western Thailand and in northern Peninsular Malaysia.
Wreathed Hornbill - The Wreathed Hornbill , also known as the Bar-pouched Wreathed Hornbill, is a species of hornbill found in forests from far north-eastern India and Bhutan, east and south through mainland south-east Asia and the Greater Sundas, except Sulawesi. It is 75–100 cm long. Males weigh from 1.8 kg to 3.65 kg , females weigh from 1.36 kg to 2.7 kg . Both sexes are similar to the respective sexes of the closely related Plain-pouched Hornbill, but they can be recognized by the lack of a dark bar on their throat .
Writhed-billed Hornbill - The Rufous-headed Hornbill , also known as the Visayan Wrinkled Hornbill, Walden's Hornbill or Writhed-billed Hornbill, is a critically endangered species of hornbill living in the rainforests on the islands of Negros and Panay in the Philippines. It is closely related to the Writhed Hornbill, but can be recognized by the yellow throat and ocular skin in the male, and the blue throat and ocular skin in the female . Its binomial name commemorates the Scottish ornithologist Viscount Walden.