Argynnis hyperbius
In 3 days ~30% in a week ~60%
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 |
With luck
About 10% of wildlife watchers report a Tropical Fritillary sighting in Hong Kong on a given day, based on 141 verified sightings from GBIF citizen-science data. It is the 90th most-seen of the 1125 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.
August and October
In those months about 20% of wildlife watchers report a Tropical Fritillary in Hong Kong on a given day, against under 5% in February, the lowest month.
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.
22nd of 28
Of the 28 cities where we can rate Tropical Fritillary sightings, Hong Kong ranks 22nd at about 10%. The best odds are in Gwangju (South Korea, about 50%), Naha (Japan, about 40%) and Daejeon (South Korea, about 40%).
Same family: Nymphalidae
The closest relatives of the Tropical Fritillary that you can see in Hong Kong (family Nymphalidae, Brush-footed Butterflies) are Ceylon Blue Glassy Tiger (about 30%), Blue-Spotted Crow Butterfly (about 30%) and Great Eggfly (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 Hong Kong (141 verified sightings), 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.
