Celaenorrhinus leucocera
In 3 days ~10% in a week ~20%
Celaenorrhinus leucocera, commonly known as the common spotted flat, is a species of butterfly belonging to the family Hesperiidae. It is a common butterfly generally found in the wet forested hills of southern Asia, from India and the Himalayas east through Indo-China. The upper surfaces of the wings are dark brown with white bands and small white spots towards the tip of the wings.
The butterfly has a wingspan of 45 to 55 mm. It is dark brown above. The forewing has a band of more or less connected discal spots, which are white and semi-transparent. Of this band, two spots, i.e. the one in end cell, and that at 2; are rectangular and connected to more or less degree. The butterfly also has small white spots in the apex of the forewing. The hindwing has a few obscure, opaque yellow spots. The hindwing margins are chequered black and white.
The male has plain white antenna shafts, while the female has plain brown shafts with white clubs. It is a very variable species. Edward Yerbury Watson (1891) gives a detailed description, shown below: All wings dark brown; some spots and a minute dot in the middle of the forewing, a small crescent at... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Common Spotted Flat sighting in Hong Kong on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 680th most-seen of the 1125 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
August
In that month about 10% of wildlife watchers report a Common Spotted Flat in Hong Kong on a given day, against under 5% in September to July, the lowest months. That is one of Hong Kong's wettest months, with about 220 mm of rain against 25 mm in December.
Among the best
Of the 2 cities where we can rate Common Spotted Flat sightings, Hong Kong ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Kochi (India, under 5%).
Same family: Hesperiidae
The closest relatives of the Common Spotted Flat 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 Common Spotted Flat is recorded against all the insects logged in Hong Kong (11 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.
