Neptis jumbah
In 3 days ~20% in a week ~40%
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 Chennai on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 188th most-seen of the 376 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.
May
In that month about 20% of wildlife watchers report a Chestnut-Streaked Sailer in Chennai on a given day, against under 5% in January, March, July–September and November, the lowest months. That is one of Chennai's driest months, with about 55 mm of rain against 290 mm in November.
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, Chennai ranks 7th 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 Chennai (14 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.
