SPICEBUSH SWALLOWTAIL BUTTERFLY (back) (sizes and prices below image) 
 

Spicebush Swallowtail Butterfly

Papilio troilus (range: east of the Rocky Mountains in the US and southern Canada)

Unlimited:

8" x 12" (14" x 18" paper size) ($29)
12" x 18" (18" x 24" paper size) ($49)