Meliscaeva auricollis
In 3 days ~20% in a week ~30%
Meliscaeva auricollis is a West Palearctic species of hoverfly. External images For terms see Morphology of Diptera Wing length 6-9·5 mm. Elongated body. Lunula yellow with a black mark above it. Facial knob or more black; wing. Alula triangular. Tergite 2 usually with small elongate yellow marks, or small triangular marks. Tergites 3 and 4 with a pair of spots or narrowly connected bands. Elongated body. The male terminalia are figured by Hippa (1968). Larva described and figured by Rotheray (1994).
See references for determination. Palearctic Fennoscandia South to Iberia, the Mediterranean basin. Ireland East through Europe into European parts of Russia and Turkey. Habitat: Deciduous, broad-leaved evergreen and coniferous forest. Flowers visited include white umbellifers, Arbutus unedo, Chaerophyllum, Euonymus, Euphorbia, Filipendula, Hedera, Rubus, Salix, Sorbus, Viburnum opulus.
The flight period is March to October (earlier and longer in southern Europe). The larva feeds on aphids or pysillids on trees. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Pyrénées National Park | 🇫🇷 France | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | Liverpool | 🇬🇧 United Kingdom | |
| 4 | Leeds | 🇬🇧 United Kingdom | |
| 5 | Athens | 🇬🇷 Greece | |
| 6 | Manchester | 🇬🇧 United Kingdom | |
| 7 | Istanbul | 🇹🇷 Turkey | |
| 8 | Barcelona | 🇪🇸 Spain | |
| 9 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 10 | Rome | 🇮🇹 Italy |
With luck
About 10% of wildlife watchers report a Spotted Thintail sighting in Pyrénées National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 521st most-seen of the 1277 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
December
In that month about 20% of wildlife watchers report a Spotted Thintail in Pyrénées National Park on a given day, against under 5% in February–March, June, August and October–November, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Spotted Thintail sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 parks where we can rate Spotted Thintail sightings, Pyrénées National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Snowdonia National Park (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Spotted Thintail is recorded against all the insects logged in Pyrénées National Park (19 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.
