For themes for subsequent months let us derive some mechanism, so the I do not land up deciding the theme every month, but all members get to decide it. Check the database of suggestions for the themes here http://pets.groups.yahoo.com/
For this month the theme is Oviposition. Oviposition is the process of laying eggs. So find the greatest pictures you have taken of butterflies laying eggs and post them on the group with right subject.
So send in your contributions of photos. Ideas for subsequent month themes may be given in the comments section.