Wildlife Spotting

Hello Dipanshu.mitra! This is interesting. As far as I'm aware there is only one species of Satyrium in Sikkim and that is Satyrium nepalense. Your spot seems to share most of its characteristics but has a slimmer, tighter inflorescence, the lateral sepals not having opened wide as the usually seem to do. It may be a one off or a localised form of the species. Whichever it is, it's a lucky find as I believe this species is increasingly rare due to its harvest for medicinal use. If you took any other shots of it from other angles, the whole plant, the wider location it was in etc, they would be really great to see. Here's a ref. for the species: http://www.flowersofindia.in/catalog/slides/Nepal%20Satyrium.html