Papilio iswara
In 3 days ~20% in a week ~50%
Papilio iswara, the great Helen, is a species of large swallowtail butterfly found in parts of Southeast Asia. P. iswara. Very similar to P. helenus. Palpi entirely white; the white area of the hindwing consists of 4 patches, of which the 3rd is the largest; the area in the male smaller beneath than above, with the exception of the 4th spot, which is larger beneath, between it and the red anal eye-spot in the female two more white spots, of which at least the upper one is also distinct in the mostly only 2 red submarginal spots present, both large,
usually forming a ring-spot with the marginal spots, before the anal submarginal spot no red discal spot as in P. helenus, but always 3 blue lunules. The disc of the upper surface of the forewing in the with pilose hairs.
The female paler than the male, the red submarginal spots larger on both surfaces. The genitalia similar to those of P. helenus, the harpe of the more spoon-shaped and the infra-anal processes shorter. Like P. helenus occurring in wooded districts, principally in the hills. The early stages not known. Distributed from South Tenasserim
to Sumatra and Borneo; only locally plentiful. -— iswara White (21 c... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore |
With luck
About 10% of wildlife watchers report a Great Helen Swallowtail sighting in Singapore on a given day, based on 211 verified sightings from GBIF citizen-science data. It is the 148th most-seen of the 1045 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.
April–October and December–February
In those months about 10% of wildlife watchers report a Great Helen Swallowtail in Singapore on a given day, against under 5% in March and November, the lowest months.
Only Singapore, in our data
Singapore is the only city on Wallace's Line with enough records to rate Great Helen Swallowtail sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Papilio
The closest relatives of the Great Helen Swallowtail that you can see in Singapore (genus Papilio, Common Swallowtails) are Common Mormon Swallowtail (about 30%) and Lime Swallowtail (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Great Helen Swallowtail is recorded against all the insects logged in Singapore (211 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.
