Euchrysops cnejus
In 3 days ~50% in a week ~80%
Euchrysops cnejus, the gram blue, is a small butterfly that belongs to the lycaenids or blues family. It is found from India to Australia. The species was first described by Johan Christian Fabricius in 1798. Male upperside: pale purplish suffused with a bluish shade, apparent only in certain lights. Forewing: a slender black anteciliary line edged on the inner side narrowly with fuscous dark brown, broader at apex than at the tornal angle. Hindwing: a subterminal black spot in interspace 1 and another similar spot in interspace 2, the two spots subequal in size, edged on the outer side by a white thread and on the inner side with ochraceous, more prominent in the spot in interspace 2; a slender anteciliary black line with an inner narrow margin of diffuse fuscous brown. Cilia of both forewings and hindwings pale; tail at apex of vein 2 of the hindwing black tipped with white.
Underside: silver grey, in some with a pale yellowish, in others with a faint brown tint. Forewings and hindwings: each with the following brown spots edged slenderly on either side with white: a transverse elongate spot on the discocellulars; a transverse discal series of spots straight on... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kanha National Park | 🇮🇳 India | |
| 2 | Lamington National Park | 🇦🇺 Australia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kota | 🇮🇳 India | |
| 2 | Kolkata | 🇮🇳 India | |
| 3 | Salem | 🇮🇳 India | |
| 4 | Dhaka | 🇧🇩 Bangladesh | |
| 5 | Pune | 🇮🇳 India | |
| 6 | Chennai | 🇮🇳 India | |
| 7 | Jabalpur | 🇮🇳 India | |
| 8 | Chattogram | 🇧🇩 Bangladesh | |
| 9 | Mumbai | 🇮🇳 India | |
| 10 | Davao City | 🇵🇭 Philippines |
Possible
About 20% of wildlife watchers report a Gram Blue sighting in Kolkata on a given day, based on 71 verified sightings from GBIF citizen-science data. It is the 33rd most-seen of the 213 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.
June
In that month about 40% of wildlife watchers report a Gram Blue in Kolkata on a given day, against under 5% in February and August, the lowest months. That is one of Kolkata's wettest months, with about 230 mm of rain against 10 mm in December.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Gram Blue 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 24
Of the 24 cities where we can rate Gram Blue sightings, Kolkata ranks 2nd at about 20%. The best odds are in Kota (India, about 30%).
Same family: Lycaenidae
The closest relatives of the Gram Blue that you can see in Kolkata (family Lycaenidae, Gossamer-winged Butterflies) are Plains Cupid (about 30%), Pale Grass Blue (about 20%) and Lime Blue (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gram Blue is recorded against all the insects logged in Kolkata (71 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.
