Actina chalybea
In 3 days ~20% in a week ~30%
Actina chalybea is a species of 'soldier flies' belonging to the family Stratiomyidae subfamily Beridinae. This species is present in most of Europe. Adults prefer shady and moist habitats. The adults of Actina chalybea ca reach a length of 7.5–8.5 millimetres (0.30–0.33 in) long. These flies have a metallic green thorax. The head is quite large and rounded, with small black antennae pointing forward. Palps are clearly visible. The eyes are green, almost contiguous in males and clearly separated in females. Forehead and thorax are covered with long black hair. The scutellum has four black spines. The abdomen is flattened and the legs are black with femora partially yellow.
Adults can mostly be encountered from April through June. Keith Bayless - Actina species Rozkošný, R. 1998. Chapter 24. Family Stratiomyidae. Manual Palaearct. Dipt. 2: 387–411. Biolib Tout un monde Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Actina chalybea sighting in Vienna on a given day, based on 81 verified sightings from GBIF citizen-science data. It is the 251st most-seen of the 1406 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.
April
In that month about 20% of wildlife watchers report an Actina chalybea in Vienna on a given day, against under 5% in June to March, the lowest months.
Yes
Of the 3 cities where we can rate Actina chalybea sightings, Vienna has the highest daily chance: about 10%. Next come Paris (France, about 10%) and Prague (Czechia, under 5%).
GBIF citizen-science records
It is estimated from how often the Actina chalybea is recorded against all the insects logged in Vienna (81 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.
