any of 17 species of owls with hornlike tufts of feathers on the head. The name refers especially to the great horned owl (B. virginianus) of the Americas. The great horned owl ranges from Arctic tree limits to eastern South America but is absent from the Amazon Rainforest. It is a powerful, mottled-brown predator that is often more than 60 cm (24 inches) in length, with a wingspan often approaching 2 metres (6.6 feet) in the female. Although its usual fare is small rodents and birds, the great horned owl has been known to carry off larger prey such as hens. Adapted to desert and forest, the great horned owl migrates only during food shortages.