help with a butterfly

hello,


I've got a composition of a butterfly. Inside the comp i'v emanipulate the wings to move like a butterfly. I then took the comp into a nother composition with the rest of the environment... i've parented the butterfly to a null and started moving it about... the Zrotation and postion have wiggle expressions which make it move very nicely. the problem is that as i move the null around, the butterfly sometimes looks like its flying in reverse mode (not moving in the direction of the head)

is there some way that i can use anchor point or anything like that, so when i move the butterfly it only moves head first? or do i need to simply key it to fit perfectly with the wiggles?


thanks.

thanx for the help.