Tongeia fischeri
In 3 days ~20% in a week ~40%
Tongeia fischeri, or Fischer's blue, is a butterfly of the family Lycaenidae. It was described by Eduard Friedrich Eversmann in 1843. It is found in south-eastern Europe, the southern Ural, northern and eastern Kazakhstan, south-western and southern Siberia, the Russian Far East (Primorye, southern Sakhalin), Mongolia, China, Korea and Japan. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Seoul | 🇰🇷 South Korea |
With luck
About 10% of wildlife watchers report a Fischer's Blue sighting in Seoul on a given day, based on 28 verified sightings from GBIF citizen-science data. It is the 112th most-seen of the 525 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May and July–November
In those months about 10% of wildlife watchers report a Fischer's Blue in Seoul on a given day, against under 5% in June and December–April, the lowest months. Those are among Seoul's wettest months, with about 160 mm of rain a month against 20 mm in January.
Only Seoul, in our data
Seoul is the only city on Wallace's Line with enough records to rate Fischer's Blue sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Lycaenidae
The closest relatives of the Fischer's Blue that you can see in Seoul (family Lycaenidae, Gossamer-winged Butterflies) are Pale Grass Blue (about 20%), Short-Tailed Blue (about 10%) and Large Copper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Fischer's Blue is recorded against all the insects logged in Seoul (28 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.
