Actina chalybea
In 3 days ~10% 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 Paris on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 269th most-seen of the 916 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report an Actina chalybea in Paris on a given day, against under 5% in June to March, the lowest months.
Among the best
Of the 3 cities where we can rate Actina chalybea sightings, Paris ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Vienna (Austria, about 10%).
Same family: Stratiomyidae
The closest relatives of the Actina chalybea that you can see in Paris (family Stratiomyidae, Soldier Flies) are Black Soldier Fly (about 10%) and Broad Centurion Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Actina chalybea is recorded against all the insects logged in Paris (30 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.
