Penthema formosanum
In 3 days ~20% in a week ~40%
Penthema formosanum is a butterfly of the family Nymphalidae. It is endemic to Taiwan. The wingspan is 70–85 mm. The larvae have been recorded on Sinocalamus oldhami, Bambusa multiplex and Phyllostachys makinoi. Wikipedia →
| # | 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 Taiwanese Kaiser sighting in Taroko National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 447 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.
March
In that month about 20% of wildlife watchers report a Taiwanese Kaiser in Taroko National Park on a given day, against under 5% in April–June, September and November–February, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Taiwanese Kaiser 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 Taiwanese Kaiser sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Nymphalidae
The closest relatives of the Taiwanese Kaiser that you can see in Taroko National Park (family Nymphalidae, Brush-footed Butterflies) are Yellow Emperor (about 40%), Common Palmfly (about 30%) and Common Mapwing (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Taiwanese Kaiser is recorded against all the insects logged in Taroko National Park (5 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.
