Arhopala atrax
In 3 days ~20% in a week ~50%
Arhopala atrax, the dark broken-band oakblue or Indian oakblue, is a species of lycaenid or blue butterfly found in the Indomalayan realm (India, Myanmar to Malaya). Male. Upperside purplish-blue, shining in certain lights. Forewing with a narrow costal black band, outer marginal black band about twice as broad. Hindwing with the costal space and outer marginal line black, tail black, tipped with white, indications of a blackish spot on the margin on each side of the tail, abdominal fold grey. Cilia black, with white tips. Underside pale brown, with a lilac tint, markings darker brown, edged with white. Forewing with three oval cell spots, increasing in size outwards, an outwardly oblique spot below the last, and another in the next lower interspace, slightly outwardly oblique below the middle cell spot, well separated from each other; a discal band of seven spots, the first four conjoined, outwardly oblique, the second and fourth a little outwards, the fifth inwards, its upper outer end almost touching the lower inner end of the fourth, and joined to the sixth outwardly obliquely, the seventh similarly inwards and similarly oblique, with a small mark attached to... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Indian Oakblue sighting in Doi Inthanon National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 131st most-seen of the 153 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
December
In that month about 20% of wildlife watchers report an Indian Oakblue in Doi Inthanon National Park on a given day, against under 5% in March–May and July–November, the lowest months. That is one of Doi Inthanon National Park's driest months, with about 45 mm of rain against 340 mm in August.
Between 1 and 4 am
Across all the parks we cover, that three-hour window holds the most Indian Oakblue sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Doi Inthanon National Park, in our data
Doi Inthanon National Park is the only park on Wallace's Line with enough records to rate Indian Oakblue sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Lycaenidae
The closest relatives of the Indian Oakblue that you can see in Doi Inthanon National Park (family Lycaenidae, Gossamer-winged Butterflies) are Pale Hedge Blue (about 20%), Common Pierrot (about 10%) and Common Hedge Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Indian Oakblue is recorded against all the insects logged in Doi Inthanon National Park (5 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.
