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The Japanese bush-warbler (Horornis diphone) probably belongs in a different genus.

Bush-warblers (or bush warblers) are small insectivorous songbirds belonging to the genera Cettia, Horornis, and Bradypterus. They were formerly placed in the "wastebin" Old World warbler family. Neither genus as traditionally delimited is believed to be monophyletic.[1]

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:


  1. ^ a b c d Alström et al. (2006)