Parent: Strix (Earless owls)

└─ Strix aluco (Tawny owl)

└─── Strix aluco aluco

└─── Strix aluco biddulphi

└─── Strix aluco haermsi

└─── Strix aluco ma

└─── Strix aluco mauritanica

└─── Strix aluco nivicolum

└─── Strix aluco sanctinicolai

└─── Strix aluco siberiae

└─── Strix aluco sylvatica

└─── Strix aluco willkonskii

└─── Strix aluco yamadae