Eristalinus arvorum
In 3 days ~20% in a week ~30%
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Eristalinus arvorum sighting in Kolkata on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 172nd most-seen of the 213 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.
April, June and December–January
In those months about 10% of wildlife watchers report an Eristalinus arvorum in Kolkata on a given day, against under 5% in February–March, May and July–November, the lowest months. Those are among Kolkata's driest months, with about 75 mm of rain a month against 330 mm in July.
Among the best
Of the 9 cities where we can rate Eristalinus arvorum sightings, Kolkata ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Prayagraj (India, about 10%) and Changsha (China, about 10%).
Same family: Syrphidae
The closest relatives of the Eristalinus arvorum that you can see in Kolkata (family Syrphidae, Hover Flies) are Yellow-Shouldered Hover Fly (about 10%) and Mesembrius bengalensis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eristalinus arvorum is recorded against all the insects logged in Kolkata (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.
