BUTTERFLY EYES - EASTERN BLACK SWALLOWTAIL (back) (sizes and prices below image) 
 

Butterfly Eyes - Eastern Black Swallowtail Butterfly

Papilio polyxenes (range: southern Canada to Mexico, east of the Rocky Mountains)

Unlimited:

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