One intriguing item: Sandra Lambert has observed WW near Rio de Janeiro. She also posted an image (here) of a caterpillar, a good fit for T. zenobia (Janzen images here).
But there are no other T. zenobia observations on Inat south of Costa Rica. I DO have museum records for T. zenobia near Rio, but these date to 1933.
Could Sandra's caterpillar be white witch?