Neptis jumbah
In 3 days ~30% in a week ~50%
Neptis jumbah, the chestnut-streaked sailer, is a species of nymphalid butterfly found in South Asia. The male somewhat resembles Neptis columella, but differs as follows: Upperside fuliginous black, the interspaces between the veins deeper black, very conspicuous in certain lights, particularly so between the subbasal and postdiscal markings on the hindwing; the white markings suffused with very pale bluish green; the posterior two spots of the discal series on the forewing subequal; the postdiscal macular band on the hindwing with a tendency to obsolescence, varying from a narrow series of white lunules to a somewhat diffuse transverse narrow pale band. On the underside the ground colour is paler than in N. columella, the interspaces between the veins conspicuously much darker; the postdiscal and subterminal markings on both forewings and hindwings diffuse and very ill-defined. N. jumbah can also be recognized by the discal transverse series of comparatively large dark brown spots.
In the female the spots on the forewing and the subbasal band on the hindwing are comparatively broader than they are in the male; in the dry-season form of both sexes, as compared with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kanha National Park | 🇮🇳 India |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Chestnut-Streaked Sailer sighting in Kolkata on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 96th most-seen of the 213 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
February
In that month about 30% of wildlife watchers report a Chestnut-Streaked Sailer in Kolkata on a given day, against under 5% in January, May and July–September, the lowest months. That is one of Kolkata's driest months, with about 20 mm of rain against 330 mm in July.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Chestnut-Streaked Sailer sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 7 cities where we can rate Chestnut-Streaked Sailer sightings, Kolkata ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Kochi (India, about 10%), Bengaluru (India, about 10%) and Kozhikode (India, about 10%).
GBIF citizen-science records
It is estimated from how often the Chestnut-Streaked Sailer is recorded against all the insects logged in Kolkata (16 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.
