Neptis rivularis
In 3 days ~30% in a week ~60%
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 |
With luck
About 10% of wildlife watchers report a Hungarian Glider sighting in Vienna on a given day, based on 260 verified sightings from GBIF citizen-science data. It is the 42nd most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report a Hungarian Glider in Vienna on a given day, against under 5% in August to April, the lowest months. That is one of Vienna's wettest months, with about 90 mm of rain against 40 mm in February.
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.
Yes
Of the 3 cities where we can rate Hungarian Glider sightings, Vienna has the highest daily chance: about 10%. Next come Kharkiv (Ukraine, about 10%) and Nizhny Novgorod (Russia, under 5%).
Same family: Nymphalidae
The closest relatives of the Hungarian Glider that you can see in Vienna (family Nymphalidae, Brush-footed Butterflies) are Meadow Brown (about 20%), Red Admiral (about 20%) and Speckled Wood (about 20%), 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 Vienna (260 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.
