Promachus yesonicus
In 3 days ~30% in a week ~50%
Promachus yesonicus, or shioya-abu (塩屋虻, シオヤアブ) in Japanese, is a species of robber flies. In Japanese, "shioya" means a salt merchant (someone who makes or deals in salt), and "abu" means a horse-fly. This insect is called "shioya-abu" because the males have a white tip to their tail that resembles salt. 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 Promachus yesonicus sighting in Seoul on a given day, based on 49 verified sightings from GBIF citizen-science data. It is the 54th most-seen of the 525 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
In that month about 20% of wildlife watchers report a Promachus yesonicus in Seoul on a given day, against under 5% in September to May, the lowest months. That is one of Seoul's wettest months, with about 360 mm of rain against 20 mm in January.
7th of 7
Of the 7 cities where we can rate Promachus yesonicus sightings, Seoul ranks 7th at about 10%. The best odds are in Daejeon (South Korea, about 20%), Hiroshima (Japan, about 20%) and Osaka (Japan, about 20%).
GBIF citizen-science records
It is estimated from how often the Promachus yesonicus is recorded against all the insects logged in Seoul (49 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.
