Jamides bochus
In 3 days ~20% in a week ~40%
Jamides bochus, the dark cerulean, is a small butterfly found in Indomalayan realm that belongs to the lycaenids or blues family. The species was first described by Caspar Stoll in 1782. Male upperside, forewing: velvety jet black; base deep blue, beautifully metallic and shining, measured on the dorsum this colour occupies three-fourths of its length from base, its outer margin then curves upwards just past the apex of the cell, enters into the bases of interspaces 10, 11 and 12 and fills the whole of the cell. Hindwing: costal margin above subcostal vein and vein 7, and dorsal margin narrowly fuscous black, a medial longitudinal pale streak on the former; terminal margin narrowly edged with velvety black, inside which in interspaces 1 and 2 is a slender transverse whitish line, with an elongate irregular transverse black spot above it in interspace 1 and a more obscure similar spot in interspace 2; traces of such spots also are present in some specimens in the anterior interspaces. Cilia of both forewings and hindwings black; filamentous tail at apex of vein 2 black tipped with white. Underside: dark chocolate brown. Forewings and hindwings; transversely crossed... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chattogram | 🇧🇩 Bangladesh | |
| 2 | Bengaluru | 🇮🇳 India | |
| 3 | Mumbai | 🇮🇳 India | |
| 4 | Tuen Mun | 🇨🇳 China | |
| 5 | Salem | 🇮🇳 India | |
| 6 | Colombo [Sri Jayawardenepura Kotte] | 🇱🇰 Sri Lanka | |
| 7 | Taichung | 🇹🇼 Taiwan | |
| 8 | Pune | 🇮🇳 India | |
| 9 | Hong Kong | 🇨🇳 China | |
| 10 | Taipei | 🇹🇼 Taiwan |
With luck
About 10% of wildlife watchers report a Dark Cerulean sighting in Tainan on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 81st most-seen of the 97 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.
January
In that month about 30% of wildlife watchers report a Dark Cerulean in Tainan on a given day, against under 5% in February to November, the lowest months. That is one of Tainan's driest months, with about 40 mm of rain against 440 mm in August.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Dark Cerulean sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
15th of 21
Of the 21 cities where we can rate Dark Cerulean sightings, Tainan ranks 15th at about 10%. The best odds are in Chattogram (Bangladesh, about 20%), Bengaluru (India, about 20%) and Mumbai (India, about 20%).
Same family: Lycaenidae
The closest relatives of the Dark Cerulean that you can see in Tainan (family Lycaenidae, Gossamer-winged Butterflies) are Pale Grass Blue (about 30%), Lesser Grass Blue (about 20%) and Pea Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dark Cerulean is recorded against all the insects logged in Tainan (7 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.
