Leucorrhinia pectoralis
In 3 days ~10% in a week ~30%
The large white-faced darter or yellow-spotted whiteface (Leucorrhinia pectoralis) is a small dragonfly belonging to the genus Leucorrhinia in the family Libellulidae. This species is 32–39 millimetres (1.3–1.5 in) long and is the largest member of its genus in Europe. It is easily identified by the large yellow seventh segment of its abdomen.
It inhabits marshy borders and prefers less acidic waters than its close relative the white-faced darter, (Leucorrhinia dubia). It occurs from western Siberia to parts of France. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Vienna | 🇦🇹 Austria | |
| 3 | Moscow | 🇷🇺 Russia | |
| 4 | Helsinki | 🇫🇮 Finland |
Rare
Under 5% of wildlife watchers report a Large White-Faced Darter sighting in Vienna on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 471st most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Large White-Faced Darter in Vienna on a given day, against under 5% in July to April, the lowest months. Those are among Vienna's wettest months, with about 90 mm of rain a month against 40 mm in February.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Large White-Faced Darter sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 4
Of the 4 cities where we can rate Large White-Faced Darter sightings, Vienna ranks 2nd at under 5%. The best odds are in Novosibirsk (Russia, about 10%).
GBIF citizen-science records
It is estimated from how often the Large White-Faced Darter is recorded against all the insects logged in Vienna (30 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.
