Hestina persimilis
In 3 days ~40% in a week ~70%
Hestina persimilis, the siren, is an East Palearctic species of siren butterfly (Apaturinae) found in western China, Simla to Assam, Orissa. The larva feeds on Celtis australis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Siren sighting in Nanjing on a given day, based on 40 verified sightings from GBIF citizen-science data. It is the 26th most-seen of the 272 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.
September
In that month about 30% of wildlife watchers report a Siren in Nanjing on a given day, against under 5% in March and May, the lowest months.
Among the best
Of the 9 cities where we can rate Siren sightings, Nanjing ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Hefei (China, about 20%).
GBIF citizen-science records
It is estimated from how often the Siren is recorded against all the insects logged in Nanjing (40 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.
