Prosotas aluta
In 3 days ~10% in a week ~20%
Prosotas aluta, the banded lineblue, is a species of blue butterfly (Lycaenidae) found in Asia. The species was first described by Herbert Druce in 1873. Race coelestis: Male upperside: shining bluish with a purple flush in certain lights. Forewings and hindwings: termen narrowly edged with fuscous black on which the jet-black anteciliary line on each wing is obscurely visible, the edging of fuscous black slightly widened anteriorly. Underside: dusky brown. Forewing: a transverse, subbasal, broad, dark, brownish-black, white-margined band from the subcostal to vein 1, a similar band along the discocellulars also extended to vein 1, an upper discal similar band from costa, curved a little outwards and stopping short at vein 3, followed by a postdiscal transverse series of dark spots which on the inner side are comparatively broadly, on the outer side very slenderly edged with white; succeeding which is a subterminal extremely slender series of transversely linear spots, a white line and a jet-black anteciliary line; cilia brown. Hindwing: three transversely arranged dark brownish-black spots; transverse similarly coloured subbasal and discal bands, both bands inwardly... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore |
Rare
Under 5% of wildlife watchers report a Barred Lineblue sighting in Singapore on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 708th most-seen of the 1045 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Barred Lineblue in Singapore on a given day, so our monthly data shows no clear season.
Only Singapore, in our data
Singapore is the only city on Wallace's Line with enough records to rate Barred Lineblue sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Prosotas
The closest relatives of the Barred Lineblue that you can see in Singapore (genus Prosotas, Line Blues) are Tailless Lineblue (about 10%) and Common Line Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Barred Lineblue is recorded against all the insects logged in Singapore (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.
