Potanthus flava
In 3 days ~20% in a week ~30%
Potanthus flavus is a butterfly of the family Hesperiidae. It is found from the Amur region of Russia to Japan, as well as in Thailand, the Philippines and China (Jilin, Hebei, Shandong, Hunan, Fujian and Yunnan). The wingspan is 27–30 mm. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Japanese Dart sighting in Tokyo on a given day, based on 87 verified sightings from GBIF citizen-science data. It is the 174th most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and August–September
In those months about 10% of wildlife watchers report a Japanese Dart in Tokyo on a given day, against under 5% in July and October–May, the lowest months.
Among the best
Of the 3 cities where we can rate Japanese Dart sightings, Tokyo ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Nagoya (Japan, about 10%).
Same family: Hesperiidae
The closest relatives of the Japanese Dart that you can see in Tokyo (family Hesperiidae, Skippers) are Common Straight Swift (about 20%) and Small Branded Swift (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Dart is recorded against all the insects logged in Tokyo (87 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.
