Hestina persimilis
In 3 days ~10% in a week ~30%
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 |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Siren sighting in Beijing on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 143rd most-seen of the 401 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Siren in Beijing on a given day, against under 5% in September to June, the lowest months. Those are among Beijing's wettest months, with about 130 mm of rain a month against almost none in January.
9th of 9
Of the 9 cities where we can rate Siren sightings, Beijing ranks 9th at about 10%. The best odds are in Hefei (China, about 20%), Nanjing (China, about 20%) and Nagoya (Japan, about 10%).
Same family: Nymphalidae
The closest relatives of the Siren that you can see in Beijing (family Nymphalidae, Brush-footed Butterflies) are Asian Comma (about 20%), Lesser Purple Emperor (about 10%) and Indian Red Admiral (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Siren is recorded against all the insects logged in Beijing (19 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.
