Scaeva pyrastri
In 3 days ~20% in a week ~40%
Scaeva pyrastri, common name the pied hoverfly, is a species of hoverfly. These hoverflies are present in most of Europe, the Near East, the East Palearctic realm, the Nearctic realm, North Africa, and the Indomalayan realm. In the UK S. pyrastri is a migrant which arrives in some years in high numbers and in others is almost absent.
Scaeva pyrastri can reach a length of 11–15 millimetres (0.43–0.59 in). This large distinctive fly has three pairs of white comma markings (lunules) on the abdomen, these are yellow on Scaeva selenitica. The face is yellow, with reddish brown antennae. The eyes are covered with hair. Scutellum is brown yellow. The legs are red with a black base of the femur. The male's eyes do touch in the centre of the frons, while in the females they are separated.
The larvae are light green or sometimes pink, with a white dorsal longitudinal stripe. This species can be found in gardens, meadows and wasteland. Adults are common visitors to flowers of Apiaceae (Umbelliferae), but also of rape, honeysuckle and daisies. They fly from April to September, with the peak in July and August. The larvae feed on different... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Aigüestortes National Park | 🇪🇸 Spain | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 4 | Vanoise National Park | 🇫🇷 France | |
| 5 | Triglav National Park | 🇸🇮 Slovenia | |
| 6 | Wadden Sea National Park | 🇩🇪 Germany | |
| 7 | Ecrins National Park | 🇫🇷 France | |
| 8 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 9 | Pyrénées National Park | 🇫🇷 France | |
| 10 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 11 | Cévennes National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | Copenhagen | 🇩🇰 Denmark | |
| 3 | Liverpool | 🇬🇧 United Kingdom | |
| 4 | Warsaw | 🇵🇱 Poland | |
| 5 | Helsinki | 🇫🇮 Finland | |
| 6 | London | 🇬🇧 United Kingdom | |
| 7 | Manchester | 🇬🇧 United Kingdom | |
| 8 | Berlin | 🇩🇪 Germany | |
| 9 | Athens | 🇬🇷 Greece | |
| 10 | Cologne | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Eurasian Smoothwing sighting in Helsinki on a given day, based on 37 verified sightings from GBIF citizen-science data. It is the 152nd most-seen of the 838 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 Eurasian Smoothwing in Helsinki on a given day, against under 5% in October to June, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Eurasian Smoothwing sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 27 cities where we can rate Eurasian Smoothwing sightings, Helsinki ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Birmingham (United Kingdom, about 10%), Copenhagen (Denmark, about 10%) and Liverpool (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Eurasian Smoothwing is recorded against all the insects logged in Helsinki (37 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.
