Piano Key Butterfly or Postman Butterfly at Diergaarde Blijdorp, Rotterdam (Holland)

The Piano Key Butterfly is one of the heliconiine butterflies, or longwings, and are found mostly in the neotropics of South and Central America.
The Piano Key Butterfly is more commonly called the Postman Butterfly, know in taxonomy terms as Heliconius melpomene. As more people have seen the Postman Butterfly and noted that some have the striking white and black markings along the hindwing, they have been increasingly referred to as the Piano Key Butterfly. There is a huge variety in the markings of our longwing friend, partly because they are so closely related to the Heliconius erato, sometimes even crossbreeding.