Euphaea formosa
In 3 days ~50% in a week ~80%
Euphaea formosa, the Formosan damselfly, is a species of damselfly in the family Euphaeidae. It is common in Taiwan. There is a single historical record from Xiamen, China as Euphaea compar, though this 19th-century specimen was likely mislabeled; today the species is considered endemic to Taiwan.
The IUCN conservation status of Euphaea formosa is 'least concern', with no immediate threat to the species' survival. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Formosan Damselfly sighting in Taipei on a given day, based on 419 verified sightings from GBIF citizen-science data. It is the 19th most-seen of the 765 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.
July to September
In those months about 30% of wildlife watchers report a Formosan Damselfly in Taipei on a given day, against under 5% in January and February, the lowest months. Those are among Taipei's wettest months, with about 230 mm of rain a month against 90 mm in February.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Formosan Damselfly 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 cities where we can rate Formosan Damselfly sightings, Taipei has the highest daily chance: about 20%. Next come Taichung (Taiwan, about 10%).
Same order: Odonata
The closest relatives of the Formosan Damselfly that you can see in Taipei (order Odonata, Dragonflies and Damselflies) are Neurothemis taiwanensis (about 30%), Crimson-Tailed Marsh Hawk (about 20%) and Blue-Tailed Forest Hawk (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Formosan Damselfly is recorded against all the insects logged in Taipei (419 verified sightings), 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.
