Cepora nerissa
In 3 days ~20% in a week ~40%
Cepora nerissa, the common gull, is a small to medium-sized butterfly of the family Pieridae, that is, the yellows and whites, which is native to Sri Lanka, India, China, southeast Asia, and Indonesia. Male upperside: white, a greyish-blue shade at base of the wings and along the veins, due to the dark markings on the underside that show through. Forewing: veins black; apex and termen black, the inner margin of that colour extended in an irregular curve from middle of costa to base of terminal third of vein 4, thence continued obliquely outwards to the tornal angle; interspaces 6 and 9 with short narrow greyish-white streaks of the ground colour that stretch into the black apical area but do not reach the margin; a short black subterminal bar between veins 3 and 4 and another, less clearly defined, between veins 1 and 2. Hindwing: veins 4 to 7 with outwardly dilated broad black edgings that coalesce sometimes and form an anterior, irregular, black, terminal margin to the wing. Underside, forewing: white, the veins broadly margined on both sides by dusky black; costal margin broadly and apex suffused with yellow; subterminal black bars between... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Keoladeo National Park | 🇮🇳 India | |
| 3 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 4 | Mudumalai National Park | 🇮🇳 India | |
| 5 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 6 | Gunung Leuser National Park | 🇮🇩 Indonesia |
With luck
About 10% of wildlife watchers report a Common Gull (butterfly) sighting in Kolkata on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 142nd most-seen of the 213 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.
April–June, September and December–January
In those months about 10% of wildlife watchers report a Common Gull (butterfly) in Kolkata on a given day, against under 5% in February–March, July–August and October–November, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Common Gull (butterfly) sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
19th of 21
Of the 21 cities where we can rate Common Gull (butterfly) sightings, Kolkata ranks 19th at about 10%. The best odds are in Jabalpur (India, about 40%), Prayagraj (India, about 30%) and Jamshedpur (India, about 30%).
Same family: Pieridae
The closest relatives of the Common Gull (butterfly) that you can see in Kolkata (family Pieridae, Whites, Yellows, and Sulphurs) are Common Jezebel (about 20%), Psyche (about 20%) and Western Striped Albatross (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Gull (butterfly) is recorded against all the insects logged in Kolkata (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.
