Euphaea masoni
In 3 days ~60% in a week ~90%
Euphaea masoni is a species of damselfly in the family Euphaeidae, the gossamerwings. The male is almost entirely black, including its wings. The female has lighter colored wings. Euphaea masoni is found mostly in Southeast Asia, including southern China, India, Laos, Myanmar, Thailand, Vietnam.
It is found near streams. Phoretic associations between larvae of Nanocladius asiaticus (Diptera, Chironomidae) and Euphaea masoni have been reported. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand | |
| 3 | Khao Luang National Park | 🇹🇭 Thailand | |
| 4 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 5 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 6 | Doi Inthanon National Park | 🇹🇭 Thailand |
Possible
About 30% of wildlife watchers report a Euphaea masoni sighting in Khao Yai National Park on a given day, based on 44 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 10th most-seen of the 221 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 50% of wildlife watchers report a Euphaea masoni in Khao Yai National Park on a given day, against under 5% in August, the lowest month.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Euphaea masoni 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 6 parks where we can rate Euphaea masoni sightings, Khao Yai National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in Khao Sok National Park (Thailand, about 30%).
Same order: Odonata
The closest relatives of the Euphaea masoni that you can see in Khao Yai National Park (order Odonata, Dragonflies and Damselflies) are Plain Flashwing (about 40%), Russet Percher (about 40%) and Crimson Marsh Glider (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Euphaea masoni is recorded against all the insects logged in Khao Yai National Park (44 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.
