List of Strigiformes by population

This list is not comprehensive, as not all Strigiformes have had their numbers quantified. For a simple list of all owl species, see the article "List of owl species".

Extinct species:
 * Bermuda saw-whet owl, described from fossil records and explorer accounts of the bird in the 17th century.
 * Laughing owl, last seen in 1914.
 * Mauritius scops owl, last seen 1837 and certainly extinct by 1859.
 * Réunion scops owl, went extinct in the 17th century after the colonization of the island of Réunion.
 * Rodrigues scops owl, last recorded in 1726.