Appearance
"Danaus erippus" is included with other Nymphalidae, the largest family of butterflies with about 6000 species distributed throughout most of the world. It has a reduced pair of forelegs, is brightly coloured, and is included with popular species such as the emperors, admirals, tortoiseshells, and fritillaries. Its wingspan reaches about 110 millimetres, with an easily recognizable orange and black pattern. Until 2007, this butterfly was treated as a subspecies of "Danaus plexippus". These species are very similar, but "D. erippus" usually has an orange trailing edge of the forewings, while in "D. plexippus" it is black. The lineages of the two species are thought to have separated about 2 million years ago. The colour of the wings in males of the southern monarch is paler than in the females.Distribution
This species can be found in tropical and subtropical latitudes of South America, mainly in Brazil, Uruguay, Paraguay, Argentina, Bolivia, Chile, and southern Peru.Food
"D. erippus", like "D. plexippus", utilizes host plants that in the genus "Asclepias" including "A. barjoniifolia", "A. boliviensis", and "A. curassavica", as well as some non-"Asclepias".Migration
Though, not as well known as the eastern North American monarch migratory phenomenon, it has been observed to move in a consistent spring/autumn manner by flying south in the autumn towards colder latitudes for the winter. Massive overwintering roosts have not yet been found.References:
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