One of the things we did while in Tucson was go to the Tucson Botanical Gardens. They had a butterfly exhibit going on that was pretty amazing. We got to go into this huge room that was filled with tropical butterflies. That meant that one--the room was extremely hot and humid and two--everyone had to be extremely careful going in and out of the room to make sure none of the butterflies escaped. There were so many of them flying around that it wasn't uncommon to see one land on you. Or in my case, two mating butterflies landed on my hip! Someone who worked there brushed them off for me because apparently they usually mate for around two hours!
Butterflies love citris fruits! What do you expect from tropical butterflies? Of course, I'm sure any butterfly would like them.