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→Classification
====Strigidae====
====Strigidae====
Strigidae consists of nearly 200 living species of what are considered typical or true owls. These birds have large heads with rounded facial disks, and many species bear tufts of feathers on their heads resembling "ears". They range in size from five inches for the elf owl (''Micrathene whitneyi'') to seventy inches in the [[European eagle-owl]] (Bubo bubo) and [[great grey owl]] (''Strix nebulosa'').
Strigidae consists of nearly 200 living species of what are considered typical or true owls. These birds have large heads with rounded facial disks, and many species bear tufts of feathers on their heads resembling "ears". They range in size from five inches for the elf owl (''Micrathene whitneyi'') to seventy inches in the [[Eurasian eagle owl]] (''Bubo bubo'') and [[great grey owl]] (''Strix nebulosa'').
*''[[Aegolius]]''; saw-whet owls
*''[[Aegolius]]''; saw-whet owls
*''[[Asio]]''; eared owls
*''[[Asio]]''; eared owls
====Tytonidae====
====Tytonidae====
Tytonidae consists of 16 living species of barn and bay owls, in which the main difference from true owls is a heart-shaped facial disk. The common barn owl (''Tyto alba'') is the most widely distributed owl species on earth.
Tytonidae consists of 16 living species of barn and bay owls, in which the main difference from true owls is a heart-shaped facial disk. The common barn owl (''Tyto alba'') is the most widely distributed owl species on earth.
*''Phodilus''; bay owls
*''Phodilus''; bay owls
*''Tyto''; masked and barn owls
*''Tyto''; masked and barn owls