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 Tokyo on a given day, based on 257 verified sightings from GBIF citizen-science data. It is the 65th most-seen of the 1013 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.
Any time of year
In every month with enough records, about 10% of wildlife watchers report a Japanese Oakblue in Tokyo on a given day, so our monthly data shows no clear season.
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.
3rd of 4
Of the 4 cities where we can rate Japanese Oakblue sightings, Tokyo ranks 3rd at about 10%. The best odds are in Nagoya (Japan, about 20%) and Osaka (Japan, about 10%).
GBIF citizen-science records
It is estimated from how often the Japanese Oakblue is recorded against all the insects logged in Tokyo (257 verified sightings), 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.
