Neptis hylas
In 3 days ~50% in a week ~80%
Neptis hylas, the common sailor, is a species of nymphalid butterfly found in the Indian subcontinent and southeast Asia. It has a characteristic stiff gliding flight achieved by short and shallow wingbeats just above the horizontal. It is also present in Italy in a humid limited zone near Gorizia and Slovenia.
Bengali name: চরবাতাসি Dry-season form - Upperside black, with pure white markings. Forewing discoidal streak clavate (club shaped), apically truncate, subapically either notched or sometimes indistinctly divided; triangular spot beyond broad, well defined, acute at apex, but not elongate; discal series of spots separate, not connate (united), each about twice as long as broad; postdiscal transverse series of small spots incomplete, but some are always present. Hindwing: subbasal band of even or nearly oven width; discal and subterminal pale lines obscure; postdiscal series of spots well separated, quadrate or subquadrate, very seldom narrow. Underside from pale golden ochraceous to dark ochraceous almost chocolate; white markings as on the upperside, but broader and defined in black. Forewing: interspaces 1a and 1 from base to near the apex shaded with black... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kanha National Park | 🇮🇳 India | |
| 2 | Bandhavgarh National Park | 🇮🇳 India | |
| 3 | Periyar National Park | 🇮🇳 India | |
| 4 | Udawalawe National Park | 🇱🇰 Sri Lanka | |
| 5 | Nagarhole National Park | 🇮🇳 India | |
| 6 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 7 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 8 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 9 | Khao Yai National Park | 🇹🇭 Thailand | |
| 10 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salem | 🇮🇳 India | |
| 2 | Jabalpur | 🇮🇳 India | |
| 3 | Jamshedpur | 🇮🇳 India | |
| 4 | Tuen Mun | 🇨🇳 China | |
| 5 | Visakhapatnam | 🇮🇳 India | |
| 6 | Naha | 🇯🇵 Japan | |
| 7 | Kozhikode | 🇮🇳 India | |
| 8 | Kalyan-Dombivli | 🇮🇳 India | |
| 9 | Ponnani | 🇮🇳 India | |
| 10 | Yogyakarta | 🇮🇩 Indonesia |
Possible
About 20% of wildlife watchers report a Common Sailer sighting in Colombo [Sri Jayawardenepura Kotte] on a given day, based on 48 verified sightings from GBIF citizen-science data. It is the 23rd most-seen of the 182 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
February
In that month about 40% of wildlife watchers report a Common Sailer in Colombo [Sri Jayawardenepura Kotte] on a given day, against under 5% in October, the lowest month. That is one of Colombo [Sri Jayawardenepura Kotte]'s driest months, with about 70 mm of rain against 310 mm in November.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Sailer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
12th of 35
Of the 35 cities where we can rate Common Sailer sightings, Colombo [Sri Jayawardenepura Kotte] ranks 12th at about 20%. The best odds are in Salem (India, about 30%), Jabalpur (India, about 30%) and Jamshedpur (India, about 30%).
Same family: Nymphalidae
The closest relatives of the Common Sailer that you can see in Colombo [Sri Jayawardenepura Kotte] (family Nymphalidae, Brush-footed Butterflies) are Common Palmfly (about 30%), White Four Ring (about 30%) and Common Crow (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Sailer is recorded against all the insects logged in Colombo [Sri Jayawardenepura Kotte] (48 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.
