Question: Information:  - The northern hawk-owl ("Surnia ulula") is a non-migratory owl that usually stays within its breeding range, though it sometimes irrupts southward. It is one of the few owls that is neither nocturnal nor crepuscular, being active only during the day. This is the only living species in the genus "Surnia" of the family Strigidae, the "typical" owls (as opposed to barn owls, Tytonidae). The species is sometimes called simply the hawk owl; however, many species of owls in the "Ninox" genus are also called "hawk owls".  - Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds.  - Barn - owls ( family Tytonidae ) are one of the two families of owls , the other being the true owls or typical owls , Strigidae . They are medium to large owls with large heads and characteristic heart - shaped faces . They have long , strong legs with powerful talons . They also differ from Strigidae in structural details relating in particular to the sternum and feet . The barn owls comprise two extant sub-families : the Tytoninae or Tyto owls ( including the common barn owl ) and the Phodilinae or bay - owls . The Sibley - Ahlquist taxonomy unites the Caprimulgiformes with the owl order ; here , the barn - owls are a subfamily Tytoninae . This is unsupported by more recent research ( see Cypselomorphae ) , but the relationships of the owls in general are still unresolved . The barn owls are a wide ranging family , although they are absent from northern North America , Saharan Africa and large areas of Asia . They live in a wide range of habitats from deserts to forests , and from temperate latitudes to the tropics . The majority of the 16 living species of barn owls are poorly known . Some , like the red owl , have barely been seen or studied since their discovery , in contrast to the common barn owl , which is one of the best known owl species in the world . However , some sub-species of the common barn owl possibly deserve to be separate species , but are very poorly known . Five species of barn - owl are threatened , and some island species have gone extinct during the Holocene or earlier ( e.g. Tyto pollens , known from the fossil record of Andros Island in the Bahamas , and possibly the basis for the mythical Chickcharnie ) . The barn - owls are mostly nocturnal , and generally non-migratory , living in pairs or singly .  - Owls are birds from the order Strigiformes, which includes about 200 species of mostly solitary and nocturnal birds of prey typified by an upright stance, a large, broad head, binocular vision, binaural hearing, sharp talons, and feathers adapted for silent flight. Exceptions include the diurnal northern hawk-owl and the gregarious burrowing owl.  - The genus Tyto includes all barn owls (family Tytonidae) except for the bay owls (subfamily Phodilinae, genus "Phodilus")  that is, the true barn owls, the grass owls and the masked owls collectively making up the subfamily Tytoninae. They are darker on the back than the front, usually an orange-brown colour, the front being a paler version of the back or mottled, although there is considerable variation even amongst species. "Tyto" owls have a divided, heart-shaped facial disc, and lack the ear-like tufts of feathers found in many other owls. "Tyto" owls tend to be larger than Bay-owls. The name "tyto ()" is onomatopeic Greek for owl.  - The burrowing owl ("Athene cunicularia") is a small, long-legged owl found throughout open landscapes of North and South America. Burrowing owls can be found in grasslands, rangelands, agricultural areas, deserts, or any other open dry area with low vegetation. They nest and roost in burrows, such as those excavated by prairie dogs ("Cynomys" spp.). Unlike most owls, burrowing owls are often active during the day, although they tend to avoid the midday heat. Like many other kinds of owls, though, burrowing owls do most of their hunting from dusk until dawn, when they can use their night vision and hearing to their advantage. Living in open grasslands as opposed to forests, the burrowing owl has developed longer legs that enable it to sprint, as well as fly, when hunting.  - Hawks are a group of medium-sized diurnal birds of prey of the family Accipitridae which are widely distributed and varying greatly in size.    What object entity has the relation of 'parent taxon' with the subject 'barn-owl'?   Choices: - accipitridae  - athene  - cynomys  - ostrich  - strigidae  - strigiformes  - surnia  - tyto  - tytonidae
Answer:
strigiformes