So I have been looking up butterflys. Mainly the largest and poisones one.
This is what the net has garnerd:
Largest is:
http://en.wikipedia.org/wiki/Queen_Alexandra's_Birdwing
With a wingspan of >12 inches!
Largest Poisionis one is:
http://www.australianfauna.com/antimachusswallowtail.phpAntimachus Swallowtail
With a wingspan of 8 to 9 inches.
Freakishly large butterflys.