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The South American Great Horned Owl, Bubo virginianus nacurutu, is a subspecies of the Great Horned Owl, Bubo virginianus. It lives in South America, in more open areas than other Great Horned Owls. These owls live from the temperate regions down to the Antarctic climates of Tierra Del Fuego. The owls that live in the tropical lowlands are slightly bigger. In the more temperate regions, the owls have a dark barring on there underparts. The owls in the Andes are much darker than the other populations. Some scientists think that the South American Great Horned Owl is actually a single species, and these isolated populations are the sub-species.
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