Leucozona glaucia
In 3 days ~20% in a week ~40%
Leucozona glaucia, the Pale-saddled Leucozona is a Palearctic hoverfly. Larvae feed on ground layer aphids. Adults are usually seen visiting flowers. External images For terms see Morphology of Diptera Wing length 8-11·25 mm. Scutellum yellow. Tergite 2 has large silverish-white to yellowish- white marks (often merged). Tergites 3 and 4 have narrow or absent markings.
The male genitalia are figured by Dusek and Laska (1967). The larva is figured by (Dusek and Laska (1962) See references for determination The species has a Palearctic distribution from Fennoscandia south to the Pyrenees, from Ireland east through central Europe into Turkey and European Russia, Russian Far East and Siberia and the Pacific coast (Kuril Islands and Japan).
The species' habitat includes Quercus and Fagus forest, riverine gallery forest of Fraxinus and Salix, beside streams, in clearings and along tracks. Flowers visited include white umbellifers, Filipendula, Sambucus and Senecio. The flight period is May to September, with the peak in July and August. The larvae feed on aphids. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Pale-Saddled Leucozona sighting in Cairngorms National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 165th most-seen of the 300 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July to September
In those months about 10% of wildlife watchers report a Pale-Saddled Leucozona in Cairngorms National Park on a given day, against under 5% in October to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Pale-Saddled Leucozona 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 parks where we can rate Pale-Saddled Leucozona sightings, Cairngorms National Park has the highest daily chance: about 10%. Next come Bavarian Forest National Park (Germany, about 10%) and Pyrénées National Park (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Pale-Saddled Leucozona is recorded against all the insects logged in Cairngorms National Park (9 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.
