Seioptera vibrans
In 3 days ~10% in a week ~20%
Seioptera vibrans is a species of ulidiid or picture-winged fly in the genus Seioptera of the family Ulidiidae. The 5 to 6 mm long body is shiny black to blue, the head has a red forehead (frons) and a furrowed face. Both wings are transparent and tipped with a dark spot.
The adults fly from May to September near trees, bushes, hedges; once landed, they wave their wings constantly. They feed on flower pollen and small insects ( aphids ). The larvae live in litter (decomposing plants that they help to transform). Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Dark-Tipped Wingwaver sighting in Vancouver on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 278th most-seen of the 482 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.
June
In that month about 10% of wildlife watchers report a Dark-Tipped Wingwaver in Vancouver on a given day, against under 5% in July to May, the lowest months. That is one of Vancouver's driest months, with about 45 mm of rain against 210 mm in November.
Yes
Of the 2 cities where we can rate Dark-Tipped Wingwaver sightings, Vancouver has the highest daily chance: under 5%. Next come Moscow (Russia, under 5%).
Same order: Diptera
The closest relatives of the Dark-Tipped Wingwaver that you can see in Vancouver (order Diptera, Flies) are Black-Margined Flower Fly (about 10%), Common Drone Fly (about 10%) and Common European Greenbottle Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dark-Tipped Wingwaver is recorded against all the insects logged in Vancouver (14 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.
