Known as Idea lynceus, this species, which is also known as the Malaysian tree-nymph, has a unique golden chrysalis and resembles a floating piece of tissue paper when it flies as it is said to be the lightest butterfly in the world. Unfortunately, the butterfly, which is characterised by its translucent white wings patterned with black veins, and numerous oval black spots, faces a risk of extinction as the 16-year research on the rare species conducted at the Melaka Butterfly and Reptile Sanctuary in Ayer Keroh here may not continue due to a lack of funds. Sanctuary employee Azmira Edora Mohamad, 25, holding up a tree nymph butterfly.