Bubo magellanicus; Print; The lesser horned owl or Magellanic horned owl (Bubo magellanicus) is a large owl of the genus Bubo found in southern South America; extending north to the central Andes. It has traditionally been classified as a subspecies of the great horned owl (Bubo virginianus); but is now treated as a separate species based on differences in voice and size and because of the genetic distance between the two.; 1700-1880