Besides color manifested due to pigmentation, there are many instances in the natural environment where complex biological designs in the fauna or flora reveal brilliant colors, termed structural color. Since nature has had millions of years to optimize the nano-architectures that produce these fantastic colors, their structures exhibit intricate designs as well as efficient use of raw-materials, both of which are pivotal to the current field of material science. The goal of this project is to investigate the nano-architectures of the wings of several species of damsel flies in order to understand how specific feather structures endow specific colors in these structures. There are more than fifty species of damselflies in Sri Lanka, many of which are endemic. All of these damselflies produce distinct color features in their wings, possibly due to their intricate nano-architectures. We will mainly rely on spectroscopy and microscopy to determine the optical and structural properties, an eventually perform simulations to recover the architecture that is responsible for the color generation. Besides exploring the relationship between structure and color, we are also interested in understanding the evolution of these architectures, especially if the environment has influenced to shape the structure of these wings. The availability of such a diverse selection of damselflies will allow us to address these questions carefully. By understanding the elegant methods used by nature to produce unique functions, this project will provide insights on how to fabricate and optimize artificial nano-structures related to applications in optics, electronics and magnetics.