Euploea core
In 3 days ~50% in a week ~80%
Euploea core, also known as the common crow, is a common butterfly found in South Asia to Australia. In India it is also sometimes referred to as the common Indian crow, and in Australia as the Australian crow. It belongs to the crows and tigers subfamily Danainae (tribe Danaini).
E. core is a glossy-black, medium-sized 85–95 mm (3.3–3.7 in) butterfly with rows of white spots on the margins of its wings. E. core is a slow, steady flier. Due to its unpalatability it is usually observed gliding through the air with a minimum of effort. As caterpillars, this species sequesters toxins from its food plant which are passed on from larva to pupa to the adult. While feeding, it is a very bold butterfly, taking a long time at each bunch of flowers. It can also be found mud-puddling with others of its species and often in mixed groups. The males of this species visit plants like Crotalaria and Heliotropium to replenish pheromone stocks which are used to attract a female during courtship.
The common crow is the most common representative of its genus, Euploea. Like the tigers (genus Danaus), the crows are inedible and thus mimicked by other Indian butterflies (see Batesian mimicry). In addition, the Indian species of the genus Euploea show another kind of mimicry, Müllerian mimicry. Accordingly, this species has been studied in greater detail than other members of its genus in India. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Udawalawe National Park | 🇱🇰 Sri Lanka | |
| 2 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 3 | Kanha National Park | 🇮🇳 India | |
| 4 | Bandhavgarh National Park | 🇮🇳 India | |
| 5 | Nagarhole National Park | 🇮🇳 India | |
| 6 | Wilpattu National Park | 🇱🇰 Sri Lanka | |
| 7 | Yala National Park | 🇱🇰 Sri Lanka | |
| 8 | Bandipur National Park | 🇮🇳 India | |
| 9 | Satpura National Park | 🇮🇳 India | |
| 10 | Jim Corbett National Park | 🇮🇳 India | |
| 11 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jamshedpur | 🇮🇳 India | |
| 2 | Raipur | 🇮🇳 India | |
| 3 | Jabalpur | 🇮🇳 India | |
| 4 | Vijayawada | 🇮🇳 India | |
| 5 | Indore | 🇮🇳 India | |
| 6 | Salem | 🇮🇳 India | |
| 7 | Tamluk | 🇮🇳 India | |
| 8 | Kalyan-Dombivli | 🇮🇳 India | |
| 9 | Surat | 🇮🇳 India | |
| 10 | Chennai | 🇮🇳 India |
Possible
About 20% of wildlife watchers report a Common Crow sighting in Chattogram on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 12th most-seen of the 35 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.
March
In that month about 40% of wildlife watchers report a Common Crow in Chattogram on a given day, against under 5% in May and August–February, the lowest months. That is one of Chattogram's driest months, with about 40 mm of rain against 780 mm in July.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Common Crow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
28th of 36
Of the 36 cities where we can rate Common Crow sightings, Chattogram ranks 28th at about 20%. The best odds are in Jamshedpur (India, about 40%), Raipur (India, about 40%) and Jabalpur (India, about 40%).
Same family: Nymphalidae
The closest relatives of the Common Crow that you can see in Chattogram (family Nymphalidae, Brush-footed Butterflies) are Knight (about 30%), Common Five-Ring (about 30%) and Tawny Coster (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Crow is recorded against all the insects logged in Chattogram (6 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.
