Zygonyx iris
In 3 days ~50% in a week ~80%
Zygonyx iris, the emerald cascader or iridescent stream glider, is a species of dragonfly in the family Libellulidae. It is widespread in many Asian countries. A number of subspecies of Zygonyx iris have been described, but it is not clear if these merely represent extremes of geographical variation or genuine subspecies.
Its thorax has broad humeral stripe in yellow. Its abdomen is black with sides of segments 1 to 3 broadly yellow. There is a yellow mid-dorsal carina from segments 1 to 6. There is a big yellow spot on segment 7. Female is similar to the male.
It breeds in the swift rocky streams. Larva is adapted to cling on rocks. Females lay eggs in first order streams... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Luang National Park | 🇹🇭 Thailand | |
| 2 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 3 | Khao Sok National Park | 🇹🇭 Thailand | |
| 4 | Doi Inthanon National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report an Emerald Cascader sighting in Khao Luang National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 21st most-seen of the 36 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
May and July
In those months about 40% of wildlife watchers report an Emerald Cascader in Khao Luang National Park on a given day, against under 5% in January, March–April, June, August and October, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Emerald Cascader sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Emerald Cascader sightings, Khao Luang National Park has the highest daily chance: about 20%. Next come Sinharaja Forest Reserve (Sri Lanka, about 20%) and Khao Sok National Park (Thailand, about 20%).
Same family: Libellulidae
The closest relatives of the Emerald Cascader that you can see in Khao Luang National Park (family Libellulidae, Skimmers) are Lyriothemis biappendiculata (about 40%), Dark-Tipped Forest-Skimmer (about 20%) and Blue Marsh Hawk (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Emerald Cascader is recorded against all the insects logged in Khao Luang 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.
