Leucorrhinia pectoralis
In 3 days ~10% in a week ~20%
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 Helsinki on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 732nd most-seen of the 838 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report a Large White-Faced Darter in Helsinki on a given day, against under 5% in July to May, the lowest months.
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.
4th of 4
Of the 4 cities where we can rate Large White-Faced Darter sightings, Helsinki ranks 4th at under 5%. The best odds are in Novosibirsk (Russia, about 10%), Vienna (Austria, under 5%) and Moscow (Russia, under 5%).
GBIF citizen-science records
It is estimated from how often the Large White-Faced Darter is recorded against all the insects logged in Helsinki (5 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.
