Arhopala eumolphus
In 3 days ~10% in a week ~20%
Arhopala eumolphus, the green oakblue, is a lycaenid butterfly found in the Indomalayan realm. The species was first described by Pieter Cramer in 1780. A. eumolphus is recognisable by the males, which exhibit a bright green lustre. However, it has not yet been determined whether some of these green forms differ sufficiently from each other to be classified as separate species. Typical specimens are from Northern India and are observed during the rainy season. The male is characterized by an abundant emerald-green with a golden lustre, while the jet-black marginal band is narrow on the forewing and broad on the hindwing. The female, on the other hand, is dark-red brown above with a violet-blue reflection in the basal portion; the hindwing has a small tail. In tagore Fruhst., from Assam, the male is smaller, but it has a broader black marginal band than specimens from Sikkim. In the female of this form, the blue colour above is darker, but it extends further across the wing.
The butterfly is mostly seen in India, ranging from West Bengal and Sikkim to Arunachal Pradesh, and is also found in Nepal, Bhutan, Bangladesh, and Myanmar. It is also located in Hainan... 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 Green Oakblue sighting in Singapore on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 788th 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 Green Oakblue 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 Green Oakblue sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Arhopala
The closest relatives of the Green Oakblue that you can see in Singapore (genus Arhopala, Oakblues) are Dull Oak-Blue (about 10%), Aberrant Oakblue (about 10%) and Major Yellow Oakblue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green Oakblue is recorded against all the insects logged in Singapore (8 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.
