Ideopsis vulgaris
In 3 days ~70% in a week ~90%
Ideopsis vulgaris, the blue glassy tiger, is a butterfly that belongs to the crows and tigers, that is, the danaid group of the brush-footed butterflies family. In 2023, Thapa and Bhuyan published a paper recording of this species from Dehing Patkai National Park in Assam, India, marking the first documented occurrence in the state and the second record for the country.
This species can be found in India, SriLanka, Singapore, Thailand, Laos, Vietnam, Hainan, South Burma - Sundaland, Sumatra, Java, Lesser Sunda Islands - Alor, Borneo – Palawan. These butterflies inhabits a range of habitats, but especially occur at the edge of rainforest or plantations and in the coastal mangrove areas.
Ideopsis vulgaris has a wingspan reaching 70–80 millimetres (2.8–3.1 in). This butterfly is quite similar to the dark glassy tiger (Parantica agleoides). A transverse black bar... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 2 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 3 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 4 | Kinabalu Park | 🇲🇾 Malaysia | |
| 5 | Sepilok | 🇲🇾 Malaysia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 2 | Singapore | 🇸🇬 Singapore |
Possible
About 30% of wildlife watchers report a Blue Glassy Tiger sighting in Cuc Phuong National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 40th most-seen of the 126 insects we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
June
In that month about 60% of wildlife watchers report a Blue Glassy Tiger in Cuc Phuong National Park on a given day, against under 5% in February, April, July–August and November, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Blue Glassy Tiger sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 5
Of the 5 parks where we can rate Blue Glassy Tiger sightings, Cuc Phuong National Park ranks 2nd at about 30%. The best odds are in Way Kambas National Park (Indonesia, about 40%).
GBIF citizen-science records
It is estimated from how often the Blue Glassy Tiger is recorded against all the insects logged in Cuc Phuong National Park (15 verified sightings from 2019 to 2026), 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.
