image is a derivative work of the following images: File:Buteo_buteo_primary_secondary.jpg licensed with Cc-by-2.5, Cc-by-sa-3.0-migrated, GFDL 2006-03-05T09:05:04Z
DescriptionComparison primarysecondary.jpg description: Two secondaries of a "Common Buzzard" (Buteobuteo), two inner primaries of Owls (Tyto alba, Asio