Caltoris cahira
In 3 days ~10% in a week ~30%
Caltoris cahira, the colon swift, is a species of skipper butterfly found in Asia. It mainly found in the forest area of south Asian countries like Bangladesh, India, etc. Like other swifts, it flies very fast and darts all around. Sometime it basks with its wings spread. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tuen Mun | 🇨🇳 China |
Rare
Under 5% of wildlife watchers report a Colon Swift sighting in Tuen Mun on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 441st most-seen of the 557 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.
March, May–August and October
In those months about 10% of wildlife watchers report a Colon Swift in Tuen Mun on a given day, against under 5% in April, September and November–February, the lowest months. Those are among Tuen Mun's wettest months, with about 180 mm of rain a month against 20 mm in December.
Only Tuen Mun, in our data
Tuen Mun is the only city on Wallace's Line with enough records to rate Colon Swift sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Colon Swift is recorded against all the insects logged in Tuen Mun (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.
