Biston perclara
In 3 days ~40% in a week ~70%
Biston perclara is a moth of the family Geometridae. It is found in Taiwan and Japan. 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 Biston perclara sighting in Taroko National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 104th most-seen of the 447 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March and April
In those months about 30% of wildlife watchers report a Biston perclara in Taroko National Park on a given day, against under 5% in September and November–January, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Biston perclara sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Only Taroko National Park, in our data
Taroko National Park is the only park on Wallace's Line with enough records to rate Biston perclara sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Biston perclara that you can see in Taroko National Park (family Geometridae, Geometer Moths) are Agathia laetata (about 10%), Comostola laesaria (about 10%) and Black Looper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Biston perclara is recorded against all the insects logged in Taroko National Park (18 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.
