Stream Ruby (Rhinocypha bisignata) is a damselfly belonging to Chlorociphidae family (known as stream jewels). It can be found near streams, especially forest streams of South India.
Stream Ruby (male) from Cheruvally, Kerala, on 2.8.2014
It is easy to identify due to its colors. Males have orange patches on thorax. The red patches on fore-wing is also noticeable.