Heliocypha bisignata
In 3 days ~60% 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 Mudumalai National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 13 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
April
In that month about 60% of wildlife watchers report a Stream Ruby in Mudumalai National Park on a given day, against under 5% in May, October and December–January, the lowest months. That is one of Mudumalai National Park's driest months, with about 55 mm of rain against 230 mm in July.
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.
Among the best
Of the 2 parks where we can rate Stream Ruby sightings, Mudumalai National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in Periyar National Park (India, about 30%).
Same order: Odonata
The closest relatives of the Stream Ruby that you can see in Mudumalai National Park (order Odonata, Dragonflies and Damselflies) are Crimson-Tailed Marsh Hawk (about 30%), Chalky Percher (about 30%) and Ditch Jewel (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 Mudumalai National Park (8 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.
