Argynnis hyperbius
In 3 days ~80% in a week >90%
The Indian fritillary (Argynnis hyperbius) is a species of butterfly of the nymphalid or brush-footed family. It is usually found from northeast, south and southeast Asia to Australia. Male: Upperside: forewing rich orange yellow, hindwing paler yellow, with the following black markings: Forewing: cell with a basal short transverse streak, a medial broad oval loop, its outer margin sinuous; a broad transverse streak beyond cell not reaching the median nervure; a broad streak along the discocellulars; a zigzag discal series of large spots, angulated outwardly in interspace 4, inwardly in interspace 2, a minute spot at base of interspace 1; a somewhat diffuse large postdiscal spot below the costa in interspace 6; a postdiscal sinuous series of round spots, those in interspaces 1 and 4 very small; an inner complete subterminal sinuous series of round spots; an outer subterminal line, widening on the veins, and a terminal slender line. Hindwing: a basal, transverse, obscure narrow mark in cell, another above it in interspace 7, a transverse lunule across the middle of the cell; a small spot outwardly bordering the lower discocellular; a discal series of transverse spots... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Horton Plains National Park | 🇱🇰 Sri Lanka | |
| 2 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 3 | Nikko National Park | 🇯🇵 Japan | |
| 4 | Taroko National Park | 🇹🇼 Taiwan | |
| 5 | Doi Inthanon National Park | 🇹🇭 Thailand |
Likely
About 50% of wildlife watchers report a Tropical Fritillary sighting in Horton Plains National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the most-seen of the 6 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
February
In that month about 70% of wildlife watchers report a Tropical Fritillary in Horton Plains National Park on a given day, against about 10% in March, August and October–November, the lowest months. That is one of Horton Plains National Park's driest months, with about 90 mm of rain against 370 mm in October.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Tropical Fritillary sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 parks where we can rate Tropical Fritillary sightings, Horton Plains National Park has the highest daily chance: about 50%. Next come Cuc Phuong National Park (Vietnam, about 30%) and Nikko National Park (Japan, about 30%).
Same family: Nymphalidae
The closest relatives of the Tropical Fritillary that you can see in Horton Plains National Park (family Nymphalidae, Brush-footed Butterflies) are Indian Red Admiral (about 30%) and Sri Lanka Treebrown (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Tropical Fritillary is recorded against all the insects logged in Horton Plains National Park (14 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.
