Tirumala septentrionis
In 3 days ~20% in a week ~50%
Tirumala septentrionis, the dark blue tiger, is a danaid butterfly found in the Indian subcontinent and Southeast Asia. Tirumala septentrionis has a wingspan from 80–115 mm. The species closely resembles Tirumala limniace, but is sufficiently distinct to be easily recognized, even on the wing. Wings on any butterfly can show strong variations and genetics. For instance, the Dark Blue Tiger butterfly has a large wingspan because of the environment it grew up in, causing it to fly at large distances. Large sized wings were found in a low latitude area as well. Compared to T. limniace, its upperside is darker and the semihyaline markings are narrower, more distinct, and of a bluer tint. In the forewing, in interspace 1 the two streaks are narrower, never coalescent, and the upper streak forms an oval detached spot; the short streaks above vein 5 are outwardly never truncate, always acute. In the hindwing, the two streaks of the discoidal cell united at base are wide apart at their apices, with the lower streak never formed into a hook. On the underside, this species is generally darker, the apex of the forewing and the whole of the ground colour of the hindwing not being... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Namdapha National Park | 🇮🇳 India | |
| 3 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 4 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 5 | Yala National Park | 🇱🇰 Sri Lanka | |
| 6 | Mudumalai National Park | 🇮🇳 India | |
| 7 | Khao Yai National Park | 🇹🇭 Thailand | |
| 8 | Periyar National Park | 🇮🇳 India | |
| 9 | Bandipur National Park | 🇮🇳 India | |
| 10 | Cat Tien National Park | 🇻🇳 Vietnam |
With luck
About 10% of wildlife watchers report a Dark Blue Tiger sighting in Ho Chi Minh City on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 91st most-seen of the 121 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
March and April
In those months about 20% of wildlife watchers report a Dark Blue Tiger in Ho Chi Minh City on a given day, against under 5% in May–August and October–December, the lowest months. Those are among Ho Chi Minh City's driest months, with about 25 mm of rain a month against 220 mm in October.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Dark Blue Tiger sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 17
Of the 17 cities where we can rate Dark Blue Tiger sightings, Ho Chi Minh City ranks 11th at about 10%. The best odds are in Madurai (India, about 30%), Thrissur (India, about 20%) and Bengaluru (India, about 20%).
Same family: Nymphalidae
The closest relatives of the Dark Blue Tiger that you can see in Ho Chi Minh City (family Nymphalidae, Brush-footed Butterflies) are Great Eggfly (about 40%), Leopard Lacewing Butterfly (about 40%) and Grey Pansy (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dark Blue Tiger is recorded against all the insects logged in Ho Chi Minh City (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.
