Cylindromyia bicolor
In 3 days ~20% in a week ~50%
Cylindromyia bicolor is a European species of fly in the family Tachinidae. Czech Republic, Hungary, Moldova, Romania, Slovakia, Ukraine, Bosnia and Herzegovina, Bulgaria, Corsica, Croatia, Greece, Italy, Macedonia, Portugal, Serbia, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Netherlands, Switzerland, Kazakhstan, Iran, Russia, Transcaucasia.
These insects mainly inhabit dry meadows, bushes, edges of wood, marshes, parks and gardens. Cylindromyia bicolor can reach a length of 11–14 millimetres (0.43–0.55 in). These small flies have a grayish thorax and very elongated, cylindrical red abdomen, with a black longitudinal band at the base and discal bristles at the tergites 2–4. The large compound eyes are dark brown. Wings are partly smoked. Calyptra are large and white. Legs are black.
Adults can be found from mid July to October, with a peak in August. They feed on nectar and pollen of flowers of various local plants, but especially on Apiaceae. Larvae of this species are endoparasites of Rhaphigaster nebulosa (Pentatomidae). The females lay their eggs on their hosts, usually one egg per bug. Then the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Cylindromyia bicolor sighting in Warsaw on a given day, based on 29 verified sightings from GBIF citizen-science data. It is the 143rd most-seen of the 580 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Cylindromyia bicolor in Warsaw on a given day, against under 5% in November to May, the lowest months. That is one of Warsaw's wettest months, with about 75 mm of rain against 40 mm in February.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Cylindromyia bicolor sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 11 cities where we can rate Cylindromyia bicolor sightings, Warsaw has the highest daily chance: about 10%. Next come Budapest (Hungary, about 10%) and Lyon (France, about 10%).
Same family: Tachinidae
The closest relatives of the Cylindromyia bicolor that you can see in Warsaw (family Tachinidae, Tachinid Flies) are Prosena siberita (about 10%), Common Tachinid (about 10%) and Red Spotted Parasite Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cylindromyia bicolor is recorded against all the insects logged in Warsaw (29 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.
