The Southern Monarch butterfly.

The Southern Monarch butterfly, Danaus erippus (= Danaus plexippus erippus), is found in tropical and subtropical latitudes of South America, including Brazil, Uruguay, Paraguay Argentina, Bolivia, Chile and Peru.  The larvae feed on a variety of species, including milkweeds such as Asclepias curassavica.  I took this photograph in Buenos Aires in the Spring (March 2012) and did not know…