Euploea tulliolus
In 3 days ~40% in a week ~70%
Euploea tulliolus, the dwarf crow or small brown crow, is a butterfly found in the Solomon Islands, Malaysia, Taiwan, Vietnam, Singapore and Australia, that belongs to the crows and tigers, that is, the danaid group of the brush-footed butterflies family. It has a wingspan of about 4 to 8 centimeters.
Due to the purple iridescence of the butterfly under sunlight, the butterfly is also commonly referred to as the purple crow. The Taiwanese population (subspecies E. t. koxinga) engages in a mass migration from the north of Taiwan to the south and back again. During the migration the main highway blocking their route has protective netting put in place and butterfly numbers are tracked with traffic restricted during the peak of the swarm's crossing. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 3 | Noosa National Park | 🇦🇺 Australia | |
| 4 | Taroko National Park | 🇹🇼 Taiwan | |
| 5 | Lamington National Park | 🇦🇺 Australia | |
| 6 | Springbrook National Park | 🇦🇺 Australia |
Possible
About 20% of wildlife watchers report a Purple Crow Butterfly sighting in Kaohsiung on a given day, based on 64 verified sightings from GBIF citizen-science data. It is the 19th most-seen of the 218 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.
June and August
In those months about 30% of wildlife watchers report a Purple Crow Butterfly in Kaohsiung on a given day, against under 5% in March, the lowest month. Those are among Kaohsiung's wettest months, with about 370 mm of rain a month against 25 mm in February.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Purple Crow Butterfly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 cities where we can rate Purple Crow Butterfly sightings, Kaohsiung has the highest daily chance: about 20%. Next come Taipei (Taiwan, about 20%) and Taichung (Taiwan, about 10%).
GBIF citizen-science records
It is estimated from how often the Purple Crow Butterfly is recorded against all the insects logged in Kaohsiung (64 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.
