Ischiodon scutellaris
In 3 days ~20% in a week ~30%
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.
With luck
About 10% of wildlife watchers report a Yellow-Shouldered Hover Fly sighting in New Delhi on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 106th most-seen of the 174 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
December
In that month about 20% of wildlife watchers report a Yellow-Shouldered Hover Fly in New Delhi on a given day, against under 5% in January and May–November, the lowest months. That is one of New Delhi's driest months, with about 10 mm of rain against 220 mm in July.
11th of 17
Of the 17 cities where we can rate Yellow-Shouldered Hover Fly sightings, New Delhi ranks 11th at about 10%. 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 New Delhi (order Diptera, Flies) are Black Soldier Fly (about 10%), Common House Fly (about 10%) and Bathroom Moth Fly (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 New Delhi (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.
