Paper kite butterfly

The Paper Kite Butterfly is a bug in.

In
Upon donating the Paper Kite Butterfly to the museum, Blathers will say the following:

The Paper Kite Butterfly can be found in the lab, and is the only butterfly that is in the upper section of the museum.

Real-world information
Idea leuconoe, also known as the paper kite butterfly, rice paper butterfly, or large tree nymph, is a butterfly of Southeast Asian origin, although it can also be found in Northern Australia and Southern Taiwan.