|Male at Rotterdam Zoo, Netherlands|
The Wreathed Hornbill (Rhyticeros undulatus), 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 (30–40 in) long. Males weigh from 1.8 kg (4 lbs) to 3.65 kg (8 lbs), females weigh from 1.36 kg (3 lbs) to 2.7 kg (6 lbs). Both sexes are similar to the respective sexes of the closely related Plain-pouched Hornbill, but the Wreathed Hornbill can be recognized by the dark bar on the lower throat (hence the alternative common name; Bar-pouched). Though commonly considered monotypic, evidence suggests there is a level of geographical variation in the appearance.
- BirdLife International (2008). Aceros undulatus. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 21 February 2009.
- Oakland Zoo
- Rasmussen, P. M. (2000). A review of the taxonomy and status of the Plainpouched Hornbill Aceros subruficollis. Forktail 16: 83-86
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