Eristalinus arvorum
In 3 days ~30% in a week ~50%
| # | 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 Changsha on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 39th most-seen of the 56 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
October
In that month about 30% of wildlife watchers report an Eristalinus arvorum in Changsha on a given day, against under 5% in August–September and November–June, the lowest months. That is one of Changsha's driest months, with about 70 mm of rain against 240 mm in June.
Among the best
Of the 9 cities where we can rate Eristalinus arvorum sightings, Changsha ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Prayagraj (India, about 10%).
Same family: Syrphidae
The closest relatives of the Eristalinus arvorum that you can see in Changsha (family Syrphidae, Hover Flies) are Marmalade Hover Fly (about 20%) and Phytomia zonata (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 Changsha (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.
