Here is a list of owl species, categorized by their family and genera. Owls belong to the order Strigiformes, with two main families: Strigidae (typical owls) and Tytonidae (barn owls).

Family: Strigidae (Typical Owls)

1. Genus: Strix (Wood owls, forest owls)
   • Strix aluco – Tawny Owl
   • Strix occidentalis – Spotted Owl
   • Strix nebulosa – Great Grey Owl
   • Strix varia – Barred Owl
   • Strix uralensis – Ural Owl
2. Genus: Bubo (Eagle owls, horned owls)
   • Bubo bubo – Eurasian Eagle Owl
   • Bubo virginianus – Great Horned Owl
   • Bubo ascalaphus – Pharoah Eagle Owl
   • Bubo zeylonensis – Sri Lanka Spotted Eagle Owl
3. Genus: Otus (Small owls, scops owls)
   • Otus scops – European Scops Owl
   • Otus asio – Eastern Screech Owl
   • Otus seductus – Philippine Scops Owl
   • Otus megalotis – Long-eared Owl
4. Genus: Aegolius (Pygmy owls)
   • Aegolius funereus – Northern Pygmy Owl
   • Aegolius acadicus – Boreal Owl
5. Genus: Glaucidium (Dwarf owls)
   • Glaucidium passerinum – Pygmy Owl
   • Glaucidium gnoma – Northern Pygmy Owl
   • Glaucidium brasilianum – Ferruginous Pygmy Owl
6. Genus: Athene (Little owls)
   • Athene noctua – Little Owl
   • Athene brama – Indian Spotted Eagle Owl
7. Genus: Surnia (Owls with long wings and short tails)
   • Surnia ulula – Northern Hawk Owl
8. Genus: Ninox (Powerful owls, hawk owls)
   • Ninox strenua – Powerful Owl
   • Ninox boobook – Australian Boobook
9. Genus: Asio (Large owls)
   • Asio otus – Long-eared Owl
   • Asio flammeus – Short-eared Owl
   • Asio clarkii – Clark’s Owl

Family: Tytonidae (Barn Owls)

1. Genus: Tyto (Barn owls)
   • Tyto alba – Barn Owl
   • Tyto aurantia – Madagascan Barn Owl
   • Tyto capensis – Cape Barn Owl
   • Tyto soumagnei – Mauritius Barn Owl

Miscellaneous Other Species

• Genus: Pulsatrix – Giant Owl
  • Pulsatrix perspicillata – Spectacled Owl

This list covers a range of species, but there are many subspecies and regional variations within these genera as well. Some species are found in specific regions or have specialized ecological roles.