Parent: Phylloscopus (Willow warblers)

└─ Phylloscopus collybita (Common chiffchaff)

└─── Phylloscopus collybita abietinus

└─── Phylloscopus collybita brevirostris

└─── Phylloscopus collybita caucasicus

└─── Phylloscopus collybita collybita

└─── Phylloscopus collybita menzbieri

└─── Phylloscopus collybita tristis