Eurema simulatrix
In 3 days ~20% in a week ~40%
Eurema simulatrix, the changeable grass yellow, is a butterfly in the family Pieridae. It is found from Burma to Sundaland, Cambodia and the Philippines. The habitat consists of secondary or disturbed habitats including forest clearings, roadsides and riverbanks, parks and gardens.
The length of the forewings is 21–26 mm (0.83–1.02 in) for males and 19–25 mm (0.75–0.98 in) for females. Adults have two cell spots on the underside of the forewings and a large, almost cleft, reddish-brown apical spot on the forewing. 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 Hill Grass Yellow sighting in Singapore on a given day, based on 177 verified sightings from GBIF citizen-science data. It is the 163rd 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 40%, if each day is a fresh chance.
May to March
In those months about 10% of wildlife watchers report a Hill Grass Yellow in Singapore on a given day, against under 5% in April, the lowest month.
Only Singapore, in our data
Singapore is the only city on Wallace's Line with enough records to rate Hill Grass Yellow sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Eurema
The closest relatives of the Hill Grass Yellow that you can see in Singapore (genus Eurema, Grass Yellows) are Common Grass Yellow (about 10%) and Chocolate Grass Yellow (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hill Grass Yellow is recorded against all the insects logged in Singapore (177 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.
