Zygonyx iris
In 3 days ~30% in a week ~60%
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 |
With luck
About 10% of wildlife watchers report an Emerald Cascader sighting in Doi Inthanon National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 78th most-seen of the 153 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report an Emerald Cascader in Doi Inthanon National Park on a given day, against under 5% in August to April, the lowest months. That is one of Doi Inthanon National Park's wettest months, with about 270 mm of rain against 20 mm in February.
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.
4th of 4
Of the 4 parks where we can rate Emerald Cascader sightings, Doi Inthanon National Park ranks 4th at about 10%. The best odds are in Khao Luang National Park (Thailand, about 20%), 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 Doi Inthanon National Park (family Libellulidae, Skimmers) are Blue-Tailed Forest Hawk (about 30%), Blue Marsh Hawk (about 20%) and Crimson-Tailed 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 Doi Inthanon 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.
