Cepora nadina
In 3 days ~10% in a week ~20%
Cepora nadina, the lesser gull, is a small to medium-sized butterfly of the family Pieridae, that is, the yellows and whites. The species was first described by Hippolyte Lucas in 1852. It is native to Sri Lanka, India, Myanmar, Hainan, and southeast Asia.
Male has the upperside ground colour white. Forewing has the basal half of costal margin suffused with greenish yellow and irrorated (sprinkled) sparsely with black scales; apex from the middle of the costa and termen black, the inner margin of the black arched and acutely produced inwards along the veins, the black on the termen narrowed posteriorly and in interspaces 1a and 1 reduced to a mere thread. Hindwing: terminal margin with a broad dark band, due to the markings of the underside that show through by transparency, the darkness accentuated by a slight irroration of black scales; apices of some of the anterior veins black, in some specimens these are dilated and form a narrow anterior black border. Underside: white. Forewing: costal margin and apex very broadly suffused with greenish yellow and irrorated more or less densely with black scales, these latter form also diffuse subterminal... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 2 | Namdapha National Park | 🇮🇳 India | |
| 3 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 4 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 5 | Kaeng Krachan National Park | 🇹🇭 Thailand |
Rare
Under 5% of wildlife watchers report a Lesser Gull sighting in Hong Kong on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 680th most-seen of the 1125 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.
March and May
In those months about 10% of wildlife watchers report a Lesser Gull in Hong Kong on a given day, against under 5% in April and June–February, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Lesser Gull sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 cities where we can rate Lesser Gull sightings, Hong Kong ranks 2nd at under 5%. The best odds are in Kaohsiung (Taiwan, about 10%).
GBIF citizen-science records
It is estimated from how often the Lesser Gull is recorded against all the insects logged in Hong Kong (11 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.
