Arhopala japonica
In 3 days ~30% in a week ~50%
Arhopala japonica, the Japanese oakblue, is a species of butterfly in the family Lycaenidae. It is found in Indochina, Japan, the Ryukyu Islands, the Korean Peninsula and Taiwan. 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 Japanese Oakblue sighting in Taroko National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 196th 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.
February and April
In those months about 20% of wildlife watchers report a Japanese Oakblue in Taroko National Park on a given day, against under 5% in August to December, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Japanese Oakblue 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 Japanese Oakblue sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Japanese Oakblue is recorded against all the insects logged in Taroko National Park (12 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.
