Ideopsis juventa
In 3 days ~50% in a week ~80%
Ideopsis juventa, the wood nymph, gray glassy tiger or grey glassy tiger, is a species of nymphalid butterfly in the Danainae subfamily. It is found in Southeast Asia. This butterfly is dark gray or black with two rows of circular white dots along the margins of its wings and elongated white patches closer to the body. The elongated white patches appear to radiate from the thorax. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tangkoko Nature Reserve | 🇮🇩 Indonesia | |
| 2 | Bali Barat National Park | 🇮🇩 Indonesia |
Possible
About 20% of wildlife watchers report a Grey Glassy Tiger sighting in Tangkoko Nature Reserve on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 38 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.
February and September
In those months about 40% of wildlife watchers report a Grey Glassy Tiger in Tangkoko Nature Reserve on a given day, against under 5% in March–May, August and October–January, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Grey Glassy Tiger sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Grey Glassy Tiger sightings, Tangkoko Nature Reserve has the highest daily chance: about 20%. Next come Bali Barat National Park (Indonesia, about 20%).
GBIF citizen-science records
It is estimated from how often the Grey Glassy Tiger is recorded against all the insects logged in Tangkoko Nature Reserve (16 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.
