Out of all of the butterflies that are zipping around my garden right now, there is one that is a bit more relaxed but you will probably miss anyway.
|Bird thinks: "which end should I eat?"|
It seems to be just moving its hindwings up and down a bit, rubbing them together. This causes the curved "whiskers" to wiggle and flex in enticing ways. Surely this is a defense strategy, to attract predators to the tail where they can do little harm. It's made even more effective by the "eye spots" near these whiskers.
(Interesting note: the blooming onions that this butterfly is visiting today? They're the green onions I purchased at the grocery store way back in December 2010! I'm not sure what I did to keep them around so long, but they're still going!)