Bangladesh (B), Bhutan (B), Brunei Darussalam (B), Cambodia (B), India (B), Indonesia (B), Laos (B), Malaysia (B), Myanmar (B), Thailand (B), Vietnam (B).
Southern Bhutan and north-eastern India east to Vietnam (northern Annam), and south to Sumatra, Borneo, Java and Bali, including several intervening offshore islands.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010).
Voice
A loud, raucous, grunting 'uk-guk', the first note being softer and lower-pitched than the second, repeated every 1 - 2 s. Also very loud whooshing wingflaps.
Wreathed Hornbill (Rhyticeros undulatus) [XC269817]
by Keith Blomerley from near Borneo Rainforest Lodge, Danum Valley, Sabah, Malaysia (wingbeats)
Wreathed Hornbill (Rhyticeros undulatus) [XC67502]
by Marc Anderson from Sumatra; Way Kambas, Indonesia (call)
Nest
In a hollow of a large tree, 18 - 26 m above the ground. The same cavity may be used year after year.
Eggs (Guide)
1 - 3; white. Incubation: by female. Female is sealed into the nest cavity.
Subspecies
Genus sometimes merged with Aceros. Has in past sometimes been treated as conspecific with Plain-pouched Hornbill (Rhyticeros subruficollis). Northern mainland population described as subspecies ticehursti on basis of larger size, and smaller Bornean birds as aequabilis, but variation apparently clinal and racial separation unwarranted.
No subspecies.
Similar Species
Wrinkled Hornbill (Rhabdotorrhinus corrugatus) which is smaller, has a more colorful face pattern and has black at the base of the tail.
References
See References.
BirdLife International Species Factsheet