Euphaea formosa
In 3 days ~20% in a week ~40%
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.
With luck
About 10% of wildlife watchers report a Formosan Damselfly sighting in Taichung on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 172nd most-seen of the 197 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
August
In that month about 20% of wildlife watchers report a Formosan Damselfly in Taichung on a given day, against under 5% in October to June, the lowest months. That is one of Taichung's wettest months, with about 330 mm of rain against 40 mm in December.
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.
2nd of 2
Of the 2 cities where we can rate Formosan Damselfly sightings, Taichung ranks 2nd at about 10%. The best odds are in Taipei (Taiwan, about 20%).
Same order: Odonata
The closest relatives of the Formosan Damselfly that you can see in Taichung (order Odonata, Dragonflies and Damselflies) are Chalky Percher (about 40%), Common Bluetail (about 30%) and Slender Skimmer (about 30%), 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 Taichung (5 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.
