Neptis rivularis
In 3 days ~50% in a week ~80%
Neptis rivularis, the Hungarian glider, is a species of butterfly in the family Nymphalidae. It lives in Central and Eastern Europe, Russia, central Asia and the Far East as far as Japan. The breadth of its wings is 25–27 mm. It prefers forest habitats, and its caterpillars feed on Spiraea.
The upper side of the forewings is black or black-brown in colour, with a band of white spots. One or more smaller white spots can also be found between the band and the wing root. The outermost wing edge is narrow and white in colour. The underside is rusty brown and otherwise shows the same white markings as the upper side. The upper side of the hind wings is also black or black-brown in colour, edged with white on the outside with a semicircular, broad, white band, which is only broken by the dark veins. The underside is rust-brown and again shows the white markings of the upper side, with the white band outlined in black. It is very similar to Neptis sappho. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Triglav National Park | 🇸🇮 Slovenia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vienna | 🇦🇹 Austria | |
| 2 | Kharkiv | 🇺🇦 Ukraine | |
| 3 | Nizhny Novgorod | 🇷🇺 Russia |
Possible
About 20% of wildlife watchers report a Hungarian Glider sighting in Triglav National Park on a given day, based on 24 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 64th most-seen of the 260 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.
June
In that month about 40% of wildlife watchers report a Hungarian Glider in Triglav National Park on a given day, against under 5% in September to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Hungarian Glider sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Triglav National Park, in our data
Triglav National Park is the only park on Wallace's Line with enough records to rate Hungarian Glider sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Nymphalidae
The closest relatives of the Hungarian Glider that you can see in Triglav National Park (family Nymphalidae, Brush-footed Butterflies) are Silver-Washed Fritillary (about 60%), Marbled White (about 40%) and Meadow Brown (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hungarian Glider is recorded against all the insects logged in Triglav National Park (24 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.
