Dasysyrphus albostriatus
In 3 days ~30% in a week ~50%
Dasysyrphus albostriatus is a Palearctic species of hoverfly. External images For terms see Morphology of Diptera Wing length 6·25–9·5 mm. Thorax dorsum with two median stripes of white dust. The thorax is otherwise shining black. Tergites with linear yellow spots which sometimes connect on tergites 3 and 4.
The larva is figured by Dusek and Laska (1962). Palaearctic. Fennoscandia South to Iberia and north Africa. Ireland eastwards through Central and Southern Europe (Italy, Yugoslavia) to Greece, Turkey and European parts of Russia (South to Crimea and the Caucasus). East into Central Asia and Japan.
Habitat coniferous and deciduous woodland and conifer plantation, up to the alpine zone, tracksides, clearings, parks, gardens. Flowers visited include yellow composites, white umbellifers, Acer pseudoplatanus, Calluna, Crataegus, Euphorbia, Lonicera xylosteum, Papaver, Ranunculus, Rubus, Salix, Sorbus, Stellaria, Succisa pratensis, and Viburnum opulus.
The flight period is from the end of April (early April in southern Europe) to September. The larva is predominantly aphid-feeding, but also predatory on a wide range of soft-bodied... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Brussels | 🇧🇪 Belgium | |
| 5 | Warsaw | 🇵🇱 Poland | |
| 6 | Manchester | 🇬🇧 United Kingdom | |
| 7 | Leeds | 🇬🇧 United Kingdom | |
| 8 | Stockholm | 🇸🇪 Sweden | |
| 9 | Paris | 🇫🇷 France | |
| 10 | Berlin | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Stripe-Backed Brusheye sighting in Birmingham on a given day, based on 57 verified sightings from GBIF citizen-science data. It is the 162nd most-seen of the 811 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report a Stripe-Backed Brusheye in Birmingham on a given day, against under 5% in October to March, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Stripe-Backed Brusheye 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 17 cities where we can rate Stripe-Backed Brusheye sightings, Birmingham has the highest daily chance: about 10%. Next come Liverpool (United Kingdom, about 10%) and London (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Stripe-Backed Brusheye is recorded against all the insects logged in Birmingham (57 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.
