Complex sentence: It is also referred to as the common barn owl, to distinguish it from other species in the barn owl family Tytonidae which forms one of the two main lineages of living owls, the other being the typical owls (Strigidae).
Split into simpler sentences: It is also referred to as the common barn owl, to distinguish it from other species in the barn owl family Tytonidae. These form one of two main lineages of living owls, the other being the typical owls (Strigidae).