Parnara guttatus
In 3 days ~50% in a week ~80%
Parnara guttata, the common straight swift, is a butterfly of the family Hesperiidae. It is found in the Indomalayan realm, Amur (Russian Far East), eastern China, Japan, Taiwan, the Philippines, and Korea. Its wingspan is about 40 mm.
Common straight swift larvae feed on various grasses, including rice. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Common Straight Swift sighting in Tokyo on a given day, based on 1,124 verified sightings from GBIF citizen-science data. It is the 10th most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
August to October
In those months about 40% of wildlife watchers report a Common Straight Swift in Tokyo on a given day, against under 5% in June and December–April, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Common Straight Swift sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 19 cities where we can rate Common Straight Swift sightings, Tokyo has the highest daily chance: about 20%. Next come Busan (South Korea, about 20%) and Daegu (South Korea, about 20%).
Same family: Hesperiidae
The closest relatives of the Common Straight Swift that you can see in Tokyo (family Hesperiidae, Skippers) are Small Branded Swift (about 10%) and Japanese Dart (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Straight Swift is recorded against all the insects logged in Tokyo (1,124 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.
