Odontoptilum angulata
In 3 days ~20% in a week ~50%
Abaratha angulata, the chestnut angle or banded angle, is a butterfly belonging to the family Hesperiidae and is found in India and southeast Asia. Male and female vinaceous-brown, palest on the hindwing. Male, forewing dull chestnut-brown along exterior margin, with a black transverse band one-third from the base; a geminated semi-transparent spot on costa before the apex, surrounded by suffused black; a semi-transparent lunule and a small spot on the lower part of the disc, bordered without by a black band: hindwing with a transverse subbasal, an elbowed discal, and a lower submarginal purplish-white line; apex of wing with suffused black patch and lower marginal blackish pale-bordered spots. Underside brown, forewing suffused with greyish-white at the base; markings as above: hindwing greyish-white, the transverse lines less defined, marginal spots blacker, and a blackish spot near base of wing. Palpi above black. Palpi and body beneath and legs greyish-white. Female paler, marked on upper-and undersides as in male. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand |
With luck
About 10% of wildlife watchers report a Chestnut Angle sighting in Hong Kong on a given day, based on 67 verified sightings from GBIF citizen-science data. It is the 164th most-seen of the 1125 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.
March to December
In those months about 10% of wildlife watchers report a Chestnut Angle in Hong Kong on a given day, against under 5% in January and February, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Chestnut Angle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 cities where we can rate Chestnut Angle sightings, Hong Kong ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Tuen Mun (China, about 10%).
Same family: Hesperiidae
The closest relatives of the Chestnut Angle that you can see in Hong Kong (family Hesperiidae, Skippers) are Indian Palm Bob (about 10%), Formosan Swift (about 10%) and Pale Awlet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut Angle is recorded against all the insects logged in Hong Kong (67 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.
