Parent: Ardeidae (Bitterns)

└─ Ixobrychus (Least bitterns)

└─── Ixobrychus cinnamomeus (Cinnamon bittern)

└─── Ixobrychus dubius (Black-backed bittern)

└─── Ixobrychus eurhythmus (Schrenk's bittern)

└─── Ixobrychus exilis (Least bittern)

└─── Ixobrychus involucris (Stripe-backed bittern)

└─── Ixobrychus minutus (Little bittern)

└─── Ixobrychus novaezelandiae

└─── Ixobrychus sinensis (Chinese bittern)

└─── Ixobrychus sturmii (Dwarf bittern)