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Stream ruby (Rhinocypha bisignata),is a species of damselfly belonging to the the family Chlorocyphidae (stream jewels). It is endemic to the India and is found near streams, especially forest streams of South India.

A male perched on my hand!

A male perched on a rock

Males are usually found perched on rocks and floating logs and grasses in forest streams. They fly occasionally to reveal their glistening wing patches. Females lay their eggs in submerged logs.