Schmutz, et al.. Parental Care by Lone Male Ferruginous Hawks (<em>buteo Regalis</em>), Rough-legged Hawks (<em>buteo Lagopus</em>), and Great Horned Owls (<em>bubo Virginianus</em>) Was Limited to Providing Food. Ottawa Field-Naturalists' Club, July 2014, doi:10.22621/cfn.v128i2.1578.