Due to their external similarity convergently acquired by strong selective pressures due to the identical habitat, they were occasionally believed to be close relatives. However, they belong to two well-distant families in the Sylvioidea, the "warbler-and-babbler" superfamily:
Phylogenetic relationship and song differences between closely related Bush Warblers (Cettia seebohmi and C. diphone).(Report)
Jun 01, 2008; Bush Warblers (Cettia spp.) radiated in southeast Asia and the southwest Pacific, although one species, C. cetti (Cetti's...