- The attached picture is of the larval stage of Danaus plexippus, in my garden, in Denmark, Western Australia. At first, I had never seen the plant before (Asclepias sp.), nor the caterpillars. The photo was taken today, 8 February 2012, after identifying at least eight individual larvae from early to late instar stage. There was also one adult flying around and feeding off the nectar of the milkweed.