Cyana formosana
In 3 days ~20% in a week ~40%
Cyana formosana is a moth of the family Erebidae first described by George Hampson in 1909. It is found in Taiwan. The wingspan is 31–43 mm. Adults are on wing in May. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Cyana formosana sighting in Taroko National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 315th most-seen of the 447 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.
January, April–May and July–September
In those months about 10% of wildlife watchers report a Cyana formosana in Taroko National Park on a given day, against under 5% in February–March, June and October–December, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Cyana formosana sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Taroko National Park, in our data
Taroko National Park is the only park on Wallace's Line with enough records to rate Cyana formosana sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Cyana formosana is recorded against all the insects logged in Taroko National Park (6 verified sightings from 2019 to 2026), 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.
