Taractrocera maevius
In 3 days ~40% in a week ~70%
Taractrocera maevius, the common grass dart, is a species of butterfly belonging to the family Hesperiidae. It is found in India, Sri Lanka and Myanmar. Male. Upperside olive-brown, with yellowish-white markings. Forewing with a short streak on the median vein in the middle of the cell, another above it at the upper end, with two short small streaks between it and the costa, sometimes connected together; a series of spots in two parts across the disc, three conjoined from the costa near the apex, and four commencing at the base of the second median interspace, divided from each other by the veins, all the spots somewhat quadrate and excavated on their outward sides, two small quadrate spots nearer the margin in the fifth and sixth interspaces. Hindwing with a series of small spots in almost a straight line in the middle of the disc. Cilia of both wings grey with white tips. Underside with the colour similar, almost as dark as on the upperside, markings similar, but on the hindwing there is a bar across the end of the cell, and two small sub-apical spots outside it. Antennse black with white bands, the club with a white basal patch on the underside; palpi above grey... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Common Grass-Dart sighting in Colombo [Sri Jayawardenepura Kotte] on a given day, based on 26 verified sightings from GBIF citizen-science data. It is the 43rd most-seen of the 182 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May and June
In those months about 30% of wildlife watchers report a Common Grass-Dart in Colombo [Sri Jayawardenepura Kotte] on a given day, against under 5% in January and March, the lowest months.
Among the best
Of the 7 cities where we can rate Common Grass-Dart sightings, Colombo [Sri Jayawardenepura Kotte] ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Salem (India, about 20%).
Same family: Hesperiidae
The closest relatives of the Common Grass-Dart that you can see in Colombo [Sri Jayawardenepura Kotte] (family Hesperiidae, Skippers) are Chestnut Bob (about 10%), Indian Palm Bob (about 10%) and Common Bush Hopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Grass-Dart is recorded against all the insects logged in Colombo [Sri Jayawardenepura Kotte] (26 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.
