True owl or Typical owl (family Strigidae) are one of the two generally accepted families of Owls,
the other being the barn owls, Tytonidae
.
This large family comprises around 189 living species in 25 genera. The typical owls have a cosmopolitan distribution and
are found on every continent except Antarctica.

One of those generas are the Bubo
see list at bottom for all generas.

Engelsk	Norsk	Latinsk
Spotted Eagle-Owl	Flekkhubro	Bubo africanus
Pharaoh Eagle-Owl	Ørkenhubro	Bubo ascalaphus
Rock Eagle-Owl	Bengalhubro	Bubo bengalensis
Eurasian Eagle-Owl	Hubro	Bubo bubo
Cape (Mackinder's) Eagle-Owl	Kopjehubro	Bubo capensis
Greyish Eagle-Owl	Sahelhubro	Bubo cinerascens
Dusky Eagle-Owl	Braminhubro	Bubo coromandus
Verreaux's (Milky) Eagle-Owl	Gråhubro	Bubo lacteus
Akun Eagle-Owl	Billehubro	Bubo leucostictus
Magellanic Horned Owl	Chilehubro	Bubo magellanicus
Spot-bellied Eagle-Owl	Skoghubro	Bubo nipalensis
Philippine Eagle-Owl	Rusthubro	Bubo philippensis
Fraser's Eagle-Owl	Småhubro	Bubo poensis
Snowy Owl	Snøugle	Bubo scandiacus
Shelley's Eagle-Owl	Herkuleshubro	Bubo shelleyi
Barred Eagle-Owl	Malayhubro	Bubo sumatranus
Great Horned Owl	Amerikahubro	Bubo virginianus
Usambara Eagle-Owl	Usambarahubro	Bubo vosseleri

The nearly 200 extant species are assigned to a number of genera, which are in taxonomic order:

Genus Megascops: screech-owls, some 20 species Genus Otus: scops-owls; probably paraphyletic, about 45 species se her Genus Pyrroglaux - Palau Owl Genus Gymnoglaux - Bare-legged Owl or Cuban Screech-owl Genus Ptilopsis - white-faced owls, 2 species Genus Mimizuku - Giant Scops-owl or Mindanao Eagle-owl Genus Bubo - horned owls, eagle-owls and fish-owls;           paraphyletic with Nyctea, Ketupa and Scotopelia, some 25 species Genus Strix - earless owls, some 15 species (lappugle, slagugle,kattugle) Genus Ciccaba - 4 species Genus Lophostrix - Crested Owl Genus Jubula - Maned Owl Genus Pulsatrix - spectacled owls, 3 species Genus Surnia - Northern Hawk-Owl (tegn) Genus Glaucidium - pygmy owls, about 30-35 species (spurveugle, tegn) Genus Xenoglaux - Long-whiskered Owlet Genus Micrathene - Elf Owl Genus Athene - 2-4 species (kirkeugle, tegn)            (depending on whether Speotyto and Heteroglaux are included or not) Genus Aegolius - saw-whet owls, 4 species Genus Ninox - Australasian hawk-owls, some 20 species Genus Uroglaux - Papuan Hawk-owl Genus Pseudoscops - Jamaican Owl and possibly Striped Owl Genus Asio - eared owls, 6-7 species (Hornugle, Jordugle tegn) Genus Nesasio - Fearful Owl

Aegolius is a small genus of owls. Three of the species are restricted to the New World, but th Boreal Owl has
a circumpolar range through North America, Eurasia, the Alps and the Rockies.

The species are:
Boreal Owl or Tegmalm's Owl, Aegolius funereus, No: Perleugle
Northern Saw-whet Owl, Aegolius acadicus
Unspotted Saw-whet Owl, Aegolius ridgwayi
Buff-fronted Owl, Aegolius harrisii