Eurema blanda
In 3 days ~20% in a week ~50%
Eurema blanda, the three-spot grass yellow, is a small butterfly of the family Pieridae which is found in Sri Lanka, India and southeast Asia. Wet form: Male. Upper-side lemon-yellow. Fore-wing with the outer marginal black band anteriorly broader than in Sri Lankan specimens of Eurema hecabe, the posterior end shorter and its inner edge outwardly oblique. Hind-wing with a moderately broad black outer band. Underside. Both wings with more or less defined ordinary markings of wet form. Fore-wing with three marks in the cell, in addition to the discocellular. No sub-apical patch. Female. Not seen.
Intermediate form: Male. Not seen. Female. Upper-side. Fore-wing with similar outer band to the wet form. Hind-wing with a broad black outer marginal band. Underside with slightly-defined ordinary brown markings as in wet form. Fore-wing with a brown sub-apical patch.
Dry form: Smaller than in wet form. Male. Upper-side. Fore-wing with narrower outer marginal band, its posterior end much smaller. Hind-wing with a slender outer band. Underside. Both wings with similar ordinary markings to the wet form. Fore-wing with a more or less defined sub-apical patch. Female. Upper-side... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Namdapha National Park | 🇮🇳 India | |
| 3 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 4 | Periyar National Park | 🇮🇳 India | |
| 5 | Kinabalu Park | 🇲🇾 Malaysia | |
| 6 | Khao Yai National Park | 🇹🇭 Thailand | |
| 7 | Taroko National Park | 🇹🇼 Taiwan |
With luck
About 10% of wildlife watchers report a Three-Spotted Grass Yellow sighting in Colombo [Sri Jayawardenepura Kotte] on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 121st most-seen of the 182 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.
February, April and July–November
In those months about 10% of wildlife watchers report a Three-Spotted Grass Yellow in Colombo [Sri Jayawardenepura Kotte] on a given day, against under 5% in March, May–June and December–January, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Three-Spotted Grass Yellow sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
15th of 17
Of the 17 cities where we can rate Three-Spotted Grass Yellow sightings, Colombo [Sri Jayawardenepura Kotte] ranks 15th at about 10%. The best odds are in Salem (India, about 50%), Tuen Mun (China, about 20%) and Thrissur (India, about 20%).
GBIF citizen-science records
It is estimated from how often the Three-Spotted Grass Yellow is recorded against all the insects logged in Colombo [Sri Jayawardenepura Kotte] (9 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.
