Ischiodon scutellaris
In 3 days ~10% in a week ~20%
Ischiodon scutellaris, commonly known as the common hover fly or yellow-shouldered hover fly, is a species of hover fly found in India, Turkey to Japan and Australia, as well as all the Pacific islands except for Hawaii.
Larvae feed on aphids, and are considered an effective biological control agent. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Yellow-Shouldered Hover Fly sighting in Bangkok on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 228th most-seen of the 245 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report a Yellow-Shouldered Hover Fly in Bangkok on a given day, against under 5% in July to May, the lowest months. That is one of Bangkok's wettest months, with about 170 mm of rain against 10 mm in December.
15th of 17
Of the 17 cities where we can rate Yellow-Shouldered Hover Fly sightings, Bangkok ranks 15th at under 5%. The best odds are in Raipur (India, about 20%), Dhaka (Bangladesh, about 20%) and Jaipur (India, about 20%).
Same order: Diptera
The closest relatives of the Yellow-Shouldered Hover Fly that you can see in Bangkok (order Diptera, Flies) are Black Soldier Fly (about 10%) and Chrysosoma leucopogon (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Shouldered Hover Fly is recorded against all the insects logged in Bangkok (6 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.
