Grey-sided bush warbler
| Grey-sided bush warbler | |
|---|---|
| |
| Sikkim, India | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Cettiidae |
| Genus: | Cettia |
| Species: | C. brunnifrons
|
| Binomial name | |
| Cettia brunnifrons (Hodgson, 1845)
| |
| Synonyms | |
| |
The grey-sided bush warbler (Cettia brunnifrons) is a species of bush warbler (family Cettiidae). It was formerly included in the "Old World warbler" assemblage.

It is found from northern Pakistan to central China.
The phylogenetic relationships among the Cettia species are shown below, based on the data by the Cornell Lab of Ornithology.[2]
| Cettia |
| ||||||||||||||||||
It split from the Cetti's warbler about 5 million years ago.
References
- ^ BirdLife International (2016). "Cettia brunnifrons". IUCN Red List of Threatened Species. 2016 e.T22714440A94416870. doi:10.2305/IUCN.UK.2016-3.RLTS.T22714440A94416870.en. Retrieved 11 November 2021.
- ^ "Phylogeny Explorer - Birds of the World". birdsoftheworld.org. Retrieved 2026-02-16.

