Leucozona glaucia
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Pale-Saddled Leucozona sighting in Pyrénées National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 940th most-seen of the 1277 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.
August
In that month about 10% of wildlife watchers report a Pale-Saddled Leucozona in Pyrénées National Park on a given day, against under 5% in September to July, 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.
3rd of 3
Of the 3 parks where we can rate Pale-Saddled Leucozona sightings, Pyrénées National Park ranks 3rd at under 5%. The best odds are in Cairngorms National Park (United Kingdom, about 10%) and Bavarian Forest National Park (Germany, about 10%).
Same family: Syrphidae
The closest relatives of the Pale-Saddled Leucozona that you can see in Pyrénées National Park (family Syrphidae, Hover Flies) are Common Drone Fly (about 10%), Tapered Drone Fly (about 10%) and Marmalade Hover Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pale-Saddled Leucozona is recorded against all the insects logged in Pyrénées National Park (7 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.
