Ariadne merione
In 3 days ~20% in a week ~40%
Ariadne merione, the common castor, is an orange butterfly with brown lines whose larvae feed almost exclusively on castor (Ricinus communis). It is similar in appearance to Ariadne ariadne, the angled castor. This species is found in South and Southeast Asia. Their wingspan ranges between 30 and 35 mm. Like others in the family Nymphalidae, their front two legs are small and unused, effectively making them four legged. These smaller appendages are covered with long hairs, giving them the characteristic brush look.
Male: Upperside brownish ochraceous. Forewings and hindwings crossed by slender, somewhat obscure, very sinuous or zigzag dark basal, two subbasal and two discal lines disposed in pairs, followed by a single, sometimes double, postdiscal and a single subterminal slender line. All these lines more or less interrupted anteriorly on the hindwing, which has a smooth unmarked uniform appearance from costa to subcostal vein and vein 5. On the forewing there is in addition a series of obscure spots between the postdiscal and subterminal markings, arid a small white subcostal spot before the apex.
Underside much as in Ariadne ariadne, but the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jabalpur | 🇮🇳 India | |
| 2 | Salem | 🇮🇳 India | |
| 3 | Raipur | 🇮🇳 India | |
| 4 | Bengaluru | 🇮🇳 India | |
| 5 | Tiruppur | 🇮🇳 India | |
| 6 | Prayagraj | 🇮🇳 India | |
| 7 | Jamshedpur | 🇮🇳 India | |
| 8 | Lucknow | 🇮🇳 India | |
| 9 | Hyderabad | 🇮🇳 India | |
| 10 | Berhampore | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Common Castor Butterfly sighting in Kaeng Krachan National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 219th most-seen of the 296 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.
August
In that month about 20% of wildlife watchers report a Common Castor Butterfly in Kaeng Krachan National Park on a given day, against under 5% in March, June–July and September–December, the lowest months. That is one of Kaeng Krachan National Park's wettest months, with about 200 mm of rain against 30 mm in December.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Castor 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.
2nd of 2
Of the 2 parks where we can rate Common Castor Butterfly sightings, Kaeng Krachan National Park ranks 2nd at about 10%. The best odds are in Royal Manas National Park (Bhutan, about 30%).
Same family: Nymphalidae
The closest relatives of the Common Castor Butterfly that you can see in Kaeng Krachan National Park (family Nymphalidae, Brush-footed Butterflies) are Marbled Map (about 30%), Dark Blue Tiger (about 30%) and Rustic (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Castor Butterfly is recorded against all the insects logged in Kaeng Krachan 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.
