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...
DescriptionButeo buteo primary secondary.jpg English: Primary in comparison with a secondary considering the "Common Buzzard" (Buteo buteo) as example...
