Euploea tulliolus
In 3 days ~60% in a week ~90%
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 30% of wildlife watchers report a Purple Crow Butterfly sighting in Cuc Phuong National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 61st most-seen of the 126 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
June
In that month about 70% of wildlife watchers report a Purple Crow Butterfly in Cuc Phuong National Park on a given day, against under 5% in July–August and October–April, the lowest months.
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 6 parks where we can rate Purple Crow Butterfly sightings, Cuc Phuong National Park has the highest daily chance: about 30%. Next come Cat Tien National Park (Vietnam, about 20%) and Noosa National Park (Australia, about 20%).
Same genus: Euploea
The closest relatives of the Purple Crow Butterfly that you can see in Cuc Phuong National Park (genus Euploea, Crow Butterflies) are Striped Blue Crow (about 40%) and Blue-Banded King Crow Butterfly (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Purple Crow Butterfly is recorded against all the insects logged in Cuc Phuong National Park (15 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.
