Ideopsis vulgaris
In 3 days ~80% 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 |
Likely
About 40% of wildlife watchers report a Blue Glassy Tiger sighting in Way Kambas National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 5 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
July and October
In those months about 60% of wildlife watchers report a Blue Glassy Tiger in Way Kambas National Park on a given day, against about 10% in April, August–September and November, the lowest months. Those are among Way Kambas National Park's driest months, with about 140 mm of rain a month against 370 mm in March. March and December–January have too few records to rate.
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.
Yes
Of the 5 parks where we can rate Blue Glassy Tiger sightings, Way Kambas National Park has the highest daily chance: about 40%. Next come Cuc Phuong National Park (Vietnam, about 30%) and Taman Negara National Park (Malaysia, about 20%).
GBIF citizen-science records
It is estimated from how often the Blue Glassy Tiger is recorded against all the insects logged in Way Kambas National Park (5 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.
