Cheirotonus formosanus
In 3 days ~30% in a week ~50%
Cheirotonus formosanus is a species of long-armed scarab beetle in the subfamily Euchirinae. It is endemic to Taiwan and inhabits montane forests. 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 Long-Armed Scarab sighting in Taroko National Park on a given day, based on 44 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 195th 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 50%, if each day is a fresh chance.
July to September
In those months about 20% of wildlife watchers report a Formosan Long-Armed Scarab in Taroko National Park on a given day, against under 5% in February–May and November–December, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Formosan Long-Armed Scarab sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen 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 Formosan Long-Armed Scarab sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Formosan Long-Armed Scarab is recorded against all the insects logged in Taroko National Park (44 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.
