Thecla formosana
In 3 days ~30% in a week ~60%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taipei | 🇹🇼 Taiwan |
With luck
About 10% of wildlife watchers report a Thecla formosana sighting in Taroko National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 129th most-seen of the 447 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.
May
In that month about 40% of wildlife watchers report a Thecla formosana in Taroko National Park on a given day, against under 5% in July to March, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Thecla formosana sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Taroko National Park, in our data
Taroko National Park is the only park on Wallace's Line with enough records to rate Thecla formosana sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Lycaenidae
The closest relatives of the Thecla formosana that you can see in Taroko National Park (family Lycaenidae, Gossamer-winged Butterflies) are Burmese Bushblue (about 20%), Common Line Blue (about 20%) and Celastrina oreas (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thecla formosana is recorded against all the insects logged in Taroko National Park (17 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.
