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Aberrant bush warbler
In Sabah, Malaysia
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Cettiidae
Genus:	Horornis
Species:	H. flavolivaceus
Binomial name
Horornis flavolivaceus (Blyth, 1845)
Synonyms
Cettia flavolivacea Cettia flavolivaceus

The aberrant bush warbler (Horornis flavolivaceus) is a species in the bush warbler family, Cettiidae. It was formerly included in the "Old World warbler" assemblage.

It is found in central and southern China, and the northern extremes of Myanmar and Vietnam. It occurs in the countries of Bhutan, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Thailand, Timor-Leste and Vietnam and also may occur in northeastern and southeastern Bangladesh.

Taxonomy

The aberrant bush warbler was formally described in 1845 by the English zoologist Edward Blyth based on a specimen collected in Nepal. He placed the species in the genus Neornis and coined the binomial name Neornis flavolivacea. The specific epithet flavolivaceus combines the Latin flavus meaning "yellow" with the Modern Latin olivaceus meaning "olive-green". The aberrant bush warbler is now placed in the genus Horornis that was introduced in 1845 by Brian Hodgson.

Thirteen subspecies are recognised:

• H. f. flavolivaceus (Blyth, 1845) – central, east Himalayas
• H. f. stresemanni (Koelz, 1954) – southwest Assam (northeast India)
• H. f. weberi (Mayr, 1941) – southeast Assam (northeast India) and west Myanmar
• H. f. intricatus (Hartert, EJO, 1909) – north, east Myanmar to south China
• H. f. oblitus (Mayr, 1941) – north Indochina
• H. f. sepiarius (Kloss, 1931) – montane north Sumatra
• H. f. flaviventris (Salvadori, 1879) – montane central, south Sumatra
• H. f. vulcanius (Blyth, 1870) – montane Java, Bali, Lombok and Sumbawa (west Lesser Sunda Islands)
• H. f. kolichisi (Johnstone, RE & Darnell, 1997) – montane Alor Island (east Lesser Sunda Islands)
• H. f. everetti (Hartert, EJO, 1898) – montane Timor and Wetar (east Lesser Sunda Islands)
• H. f. banksi (Chasen, 1935) – montane northwest Borneo
• H. f. oreophilus (Sharpe, 1888) – montane northeast Borneo
• H. f. palawanus (Ripley & Rabor, 1962) – montane Palawan (southwest Philippines)

The last eight subspecies in the above list have sometimes been considered as a separate species, the Sunda bush warbler Horornis vulcanius.

References

1. ^ BirdLife International (2017). "Horornis flavolivaceus". IUCN Red List of Threatened Species. 2017: e.T105295705A111180465. doi:10.2305/IUCN.UK.2017-1.RLTS.T105295705A111180465.en. Retrieved 6 September 2021.
2. John Ramsay MacKinnon; Karen Phillipps; Fen-qi He (2000). A field guide to the birds of China. Oxford University Press. p. 10. ISBN 978-0198549406. Aberrant Bush-warbler.
3. "Aberrant Bush Warbler - Horornis flavolivaceus". Les oiseaux.
4. Blyth, Edward (1845). "Notices and descriptions of various new or little known species of birds (continued)". Journal of the Asiatic Society of Bengal. 14, Part 2 (164): 546–602 .
5. Mayr, Ernst; Cottrell, G. William, eds. (1986). Check-List of Birds of the World. Vol. 11. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 14.
6. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 162. ISBN 978-1-4081-2501-4.
7. ^ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2023). "Cupwings, crombecs, bush warblers, Streaked Scrub Warbler, yellow flycatchers, hylias". IOC World Bird List Version 13.1. International Ornithologists' Union. Retrieved 12 February 2023.
8. Limparungpatthanakij, W.L.; Clement, P.; Kirwan, G.M. (2022). Billerman, S.M. (ed.). "Aberrant Bush Warbler (Horornis flavolivaceus), version 2.1". Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.abbwar1.02.1.

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• IUCN Red List least concern species
• Horornis
• Birds of North India
• Birds of Nepal
• Birds of Eastern Himalaya
• Birds of Central China
• Birds of Yunnan
• Birds of Southeast Asia
• Birds described in 1845
• Taxa named by Edward Blyth
• Sylvioidea stubs