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Anorrhinus
	Bushy-crested hornbill (Anorrhinus galeritus)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Bucerotiformes
Family:	Bucerotidae
Genus:	Anorrhinus; Reichenbach, 1849
Type species
	Buceros galeritus; Temminck, 1831
Species
	See text.
Synonyms
	Ptilolaemus

Anorrhinus is a genus of hornbills (family Bucerotidae) found in forests of Southeast Asia (just barely extending into adjacent parts of India and China). They are social and typically seen in groups, but only the dominant pair are believed to breed, while other group members act as helpers.

Taxonomy

This genus is sometimes limited to the bushy-crested hornbill, in which case the two remaining species, which are sometimes considered conspecific, are placed in the genus Ptilolaemus. A molecular phylogenetic study published in 2013 found that Anorrhinus was sister to a clade containing the genera Anthracoceros and Ocyceros.^[2]

The genus contains three species:^[3]

Scientific name	Common Name	Distribution
Anorrhinus austeni	Austen's brown hornbill	northeastern India and south to Vietnam and northern Thailand
Anorrhinus tickelli	Tickell's brown hornbill or rusty-cheeked hornbill	Burma and adjacent western Thailand
Anorrhinus galeritus	Bushy-crested hornbill	Brunei, Indonesia, Malaysia, Myanmar, and Thailand

References

^ "Bucerotidae". aviansystematics.org. The Trust for Avian Systematics. Retrieved 2023-07-26.
^ Gonzalez, J.-C.T.; Sheldon, B.C.; Collar, N.J.; Tobias, J.A. (2013). "A comprehensive molecular phylogeny for the hornbills (Aves: Bucerotidae)". Molecular Phylogenetics and Evolution. 67 (2): 468–483. Bibcode:2013MolPE..67..468G. doi:10.1016/j.ympev.2013.02.012. PMID 23438388.
^ Gill, Frank; Donsker, David, eds. (2019). "Mousebirds, Cuckoo Roller, trogons, hoopoes, hornbills". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 24 July 2019.

Kemp, A. C. (2001). Family Bucerotidae (Hornbills). pp. 436–523 in: del Hoyo, J., Elliott, A., & Sargatal, J. eds. (2001). Handbook of the Birds of the World. Vol. 6. Mousebirds to Hornbills. Lynx Edicions, Barcelona. ISBN 84-87334-30-X