Heliocypha bisignata
In 3 days ~70% in a week ~90%
Heliocypha bisignata, stream ruby, is a species of damselfly in the family Chlorocyphidae. It is endemic to South India where it breeds in hill streams in the southern part of the country. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Periyar National Park | 🇮🇳 India | |
| 2 | Mudumalai National Park | 🇮🇳 India |
Possible
About 30% of wildlife watchers report a Stream Ruby sighting in Periyar National Park on a given day, based on 25 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 44 insects we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
January
In that month about 60% of wildlife watchers report a Stream Ruby in Periyar National Park on a given day, against under 5% in April, July and December, the lowest months. That is one of Periyar National Park's driest months, with about 25 mm of rain against 410 mm in August.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Stream Ruby sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Stream Ruby sightings, Periyar National Park has the highest daily chance: about 30%. Next come Mudumalai National Park (India, about 30%).
Same order: Odonata
The closest relatives of the Stream Ruby that you can see in Periyar National Park (order Odonata, Dragonflies and Damselflies) are Blue Marsh Hawk (about 40%), Crimson Marsh Glider (about 30%) and Crimson-Tailed Marsh Hawk (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Stream Ruby is recorded against all the insects logged in Periyar National Park (25 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
