If you have lived in the rural areas especially the highlands, you probably have seen these beautiful butterflies. I remember to have seen them when I was young but for some reason(s) they dissapeard. I didn't have a good reason but kept guessing their dissapearance could have something tied to climatic changes.

This week I just learned something.

Forest ecologist says that, apart from their transparent wings offering a natural camouflage mechanism, their presence is an indication of high habitat quality, and their demise alerts that there is an ecological change.

Tanks Donna for sharing this tip.
The above photo isn't clikable but the bottom ones are, click to enlarge for a better view.