Papilio protenor
In 3 days ~40% in a week ~70%
Papilio protenor, the spangle, is a large butterfly found in South East Asia belonging to the swallowtail family. Upperside: velvety indigo-blue black, duller on the forewing than on the hindwing. Forewing with pale adnervular streaks broadened along the terminal margin and extended well into the cell. Hindwing: a broad pale yellowish-white subcostal streak; interspaces 4 to 6 irrorated (sprinkled) with bluish scales; tornal angle marked with red.
Underside: forewing dull black; adnervular streaks distinctly grey and much broader than on the upperside. Hindwing: ground colour as on the upperside, a large irregularly-shaped patch at the tornal angle that extends into interspace 2, and subterminal lunules in interspaces 2, 6, and 7 dull pinkish-red, cell irrorated more-or-less with a sprinkling of blue scales; the tornal patch with a black, outwardly blue-edged, round medial spot, and interspaces 4 and 5 with subterminal irrorations of blue scales. Antennae black; head, thorax and abdomen dark brownish-black.
Similar to male. Upperside: ground colour deep brownish-black; adnervular streaks on forewing yellowish; irroration of blue scales on outer... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Namdapha National Park | 🇮🇳 India | |
| 3 | Taroko National Park | 🇹🇼 Taiwan | |
| 4 | Kaeng Krachan National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Spangle Swallowtail sighting in Kaeng Krachan National Park on a given day, based on 39 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 30th most-seen of the 296 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.
February–August and October
In those months about 20% of wildlife watchers report a Spangle Swallowtail in Kaeng Krachan National Park on a given day, against under 5% in September and December–January, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Spangle Swallowtail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Spangle Swallowtail sightings, Kaeng Krachan National Park ranks 4th at about 20%. The best odds are in Cuc Phuong National Park (Vietnam, about 50%), Namdapha National Park (India, about 40%) and Taroko National Park (Taiwan, about 20%). All parks ranked.
Same genus: Papilio
The closest relatives of the Spangle Swallowtail that you can see in Kaeng Krachan National Park (genus Papilio, Common Swallowtails) are Great Mormon Swallowtail (about 30%), Paris Peacock 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 Spangle Swallowtail is recorded against all the insects logged in Kaeng Krachan National Park (39 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.
