Papilio castor
In 3 days ~30% in a week ~60%
Papilio castor, the common raven, is a species of swallowtail butterfly found in Cambodia and South Asia. The male Papilio castor has black upper wings, more or less irrorated (sprinkled) with yellowish-brown scales that on the forewing form somewhat indistinct longitudinal cell-lines and internervular streaks. The hind wing has an upper discal cream-coloured patch composed of an oval spot in interspace 4, a more elongate mark broadened outwardly in interspace 5, a similar elongate mark in interspace 6, and a much smaller broadly oval spot above it in 7; these markings are not coalescent but are distinctly divided by the black veins. The cilia on the forewings and hind wings are black alternated with white.
The underside of the male is duller and more opaque than the upper side. Whereas, the brownish-black apical area of the forewing and base of the hind wing are thinly sprinkled with yellowish-brown scales. The underside of the forewings has a small white spot on the middle discocellular and a subterminal and terminal row of small white specks that do not extend to the costa. The markings on the hind wing are similar to those on the upper side, but smaller and more... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 2 | Manas National Park | 🇮🇳 India | |
| 3 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 4 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 5 | Khao Yai National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taipei | 🇹🇼 Taiwan |
With luck
About 10% of wildlife watchers report a Common Raven Butterfly sighting in Cat Tien National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 87th most-seen of the 125 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report a Common Raven Butterfly in Cat Tien National Park on a given day, against under 5% in August to May, the lowest months. That is one of Cat Tien National Park's wettest months, with about 340 mm of rain against 15 mm in February.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Raven Butterfly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Common Raven Butterfly sightings, Cat Tien National Park ranks 4th at about 10%. The best odds are in Royal Manas National Park (Bhutan, about 30%), Manas National Park (India, about 20%) and Kaeng Krachan National Park (Thailand, about 20%).
Same genus: Papilio
The closest relatives of the Common Raven Butterfly that you can see in Cat Tien National Park (genus Papilio, Common Swallowtails) are Great Mormon Swallowtail (about 20%), Lime Swallowtail (about 20%) and Common Mormon Swallowtail (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Raven Butterfly is recorded against all the insects logged in Cat Tien National Park (7 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.
