Promachus yesonicus
In 3 days ~30% in a week ~60%
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 Sendai on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 63rd most-seen of the 128 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Promachus yesonicus in Sendai on a given day, against under 5% in September to June, the lowest months. That is one of Sendai's wettest months, with about 200 mm of rain against 80 mm in February.
6th of 7
Of the 7 cities where we can rate Promachus yesonicus sightings, Sendai ranks 6th at about 10%. The best odds are in Daejeon (South Korea, about 20%), Hiroshima (Japan, about 20%) and Osaka (Japan, about 20%).
Same order: Diptera
The closest relatives of the Promachus yesonicus that you can see in Sendai (order Diptera, Flies) are Bathroom Moth Fly (about 10%) and Tipula nova (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 Sendai (9 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.
