Ischiodon scutellaris
In 3 days ~40% in a week ~70%
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.
Possible
About 20% of wildlife watchers report a Yellow-Shouldered Hover Fly sighting in Dhaka on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 53rd most-seen of the 92 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March and December
In those months about 30% of wildlife watchers report a Yellow-Shouldered Hover Fly in Dhaka on a given day, against under 5% in May to October, the lowest months. Those are among Dhaka's driest months, with about 35 mm of rain a month against 440 mm in July.
Among the best
Of the 17 cities where we can rate Yellow-Shouldered Hover Fly sightings, Dhaka ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Raipur (India, about 20%).
GBIF citizen-science records
It is estimated from how often the Yellow-Shouldered Hover Fly is recorded against all the insects logged in Dhaka (12 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.
