|Male at Rotterdam Zoo, Netherlands|
The wreathed hornbill (Rhyticeros undulatus), also known as the bar-pouched wreathed hornbill, is a species of hornbill native to forests in northeast India, Bhutan, mainland Southeast Asia and the Greater Sundas in Indonesia. It is 75–100 cm (30–39 in) long. Males weigh from 1.8 kg (4.0 lb) to 3.65 kg (8.0 lb), and females weigh from 1.36 kg (3.0 lb) to 2.7 kg (6.0 lb). 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 some geographical variation in the appearance.
- BirdLife International (2018). "Rhyticeros undulatus". IUCN Red List of Threatened Species. 2018: e.T22682528A132400385.
- 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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