| Genus | Species |
|---|---|
| Aegolius | 4 |
| Asio | 5 |
| Athene | 6 |
| Bubo | 18 |
| Ciccaba | 1 |
| Glaucidium | 21 |
| Gymnasio | 1 |
| Heteroglaux | 0 |
| Jubula | 1 |
| Ketupa | 2 |
| Lophostrix | 1 |
| Margarobyas | 1 |
| Mascarenotus | 2 |
| Megascops | 29 |
| Micrathene | 1 |
| Mimizuku | 0 |
| Nesasio | 1 |
| Ninox | 19 |
| Nyctea | 0 |
| Otus | 39 |
| Pseudoscops | 2 |
| Psiloscops | 1 |
| Ptilopsis | 2 |
| Pulsatrix | 3 |
| Pyrroglaux | 0 |
| Sceloglaux | 1 |
| Scotopelia | 2 |
| Speotyto | 0 |
| Strix | 21 |
| Surnia | 1 |
| Taenioptynx | 1 |
| Uroglaux | 1 |
| Xenoglaux | 1 |