Promachus yesonicus
In 3 days ~60% in a week ~90%
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.
Possible
About 20% of wildlife watchers report a Promachus yesonicus sighting in Daejeon on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 11th most-seen of the 53 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
July
In that month about 50% of wildlife watchers report a Promachus yesonicus in Daejeon on a given day, against under 5% in August to May, the lowest months. That is one of Daejeon's wettest months, with about 320 mm of rain against 25 mm in January.
Yes
Of the 7 cities where we can rate Promachus yesonicus sightings, Daejeon has the highest daily chance: about 20%. Next come Hiroshima (Japan, about 20%) and Osaka (Japan, about 20%).
Same order: Diptera
The closest relatives of the Promachus yesonicus that you can see in Daejeon (order Diptera, Flies) are Phytomia zonata (about 10%), Common Drone Fly (about 10%) and Marmalade Hover Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Promachus yesonicus is recorded against all the insects logged in Daejeon (17 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.
