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.

Illustration by Keulemans, 1881

It is found from northern Pakistan to central China.

References

  1. ^ 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.