Hello,
A butterfly visiting our garden the other morning was kind enough to remain in one spot, long enough for me to grab a set of photos whilst it fed from the flowers.
At one stage, it turned its bottom to me and I was astonished to see another set of "eyes" and "antennae" waving in the viewfinder! A predator approaching from the rear could easily be fooled into believing this was the front end, so I guess the clever butterfly could escape sans tail!
Cheers
Dennis