Ariadne ariadne
In 3 days ~60% in a week ~90%
Ariadne ariadne, the angled castor, is a species of nymphalid butterfly found in Asia. This butterfly is orange brown with wavy lines running across its wings. The margin is somewhat wavy and appears truncated at the apex of the forewing. The margin is wavy with a large angle present on the fifth vein interspace and at the tip of vein three. The tornus is broadly angulate. The hindwing termen is deeply scalloped. A prominent white spot appears towards the apex of the forewing. The cilia are white, alternated with brown. On the underside there is more brown.
The antennae, head, thorax and abdomen are ochraceous rufous. Males have a series of dark shining scales (androconia) on the subcostal vein, veins 6 and 7 and a patch on the underside of the forewing towards the base. Females look similar but are slightly paler and lacking the androconial scales.
A, ariadne bears resemblance to Ariadne merione, the common castor, but in the angled castor, the transverse chestnut bands are narrower and less diffuse. The margins of the common castor are less wavy. The castor plant (Ricinus communis) is the most common host and gives the butterfly its name. Other hosts... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salem | 🇮🇳 India | |
| 2 | Kozhikode | 🇮🇳 India | |
| 3 | Ponnani | 🇮🇳 India | |
| 4 | Thrissur | 🇮🇳 India | |
| 5 | Thiruvananthapuram | 🇮🇳 India | |
| 6 | Yogyakarta | 🇮🇩 Indonesia | |
| 7 | Tuen Mun | 🇨🇳 China | |
| 8 | Taichung | 🇹🇼 Taiwan | |
| 9 | Tainan | 🇹🇼 Taiwan | |
| 10 | Chennai | 🇮🇳 India |
Possible
About 30% of wildlife watchers report an Angled Castor sighting in Cuc Phuong National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 69th 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 an Angled Castor in Cuc Phuong National Park on a given day, against under 5% in July–August and October–April, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Angled Castor sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Cuc Phuong National Park, in our data
Cuc Phuong National Park is the only park on Wallace's Line with enough records to rate Angled Castor sightings: about 30% of wildlife watchers there report one on a given day.
Same family: Nymphalidae
The closest relatives of the Angled Castor that you can see in Cuc Phuong National Park (family Nymphalidae, Brush-footed Butterflies) are Little Mapwing (about 50%), Himalayan Jester (about 50%) and Marbled Map (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Angled Castor is recorded against all the insects logged in Cuc Phuong National Park (9 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.
