Prosena siberita
In 3 days ~20% in a week ~50%
Prosena siberita is a species of fly in the family Tachinidae. This species is present in most of Europe, Central Asia, Japan, Mongolia, China, Russia, Transcaucasia, India, Indonesia, Malaysia, Myanmar, Nepal, Philippines, Ryukyu Islands, Sri Lanka, Taiwan, Australia and New Caledonia. It has been introduced and established in United States. The earliest introduction occurred in 1925, when numerous specimens were released in New Jersey for the purpose of establishing a local population to combat the spread of the Japanese beetle.
Prosena siberita can reach a body length of 7.5–10.5 millimetres (0.30–0.41 in). These flies have a grey dusted, fuscous or testaceour body. In males the abdomen is largely testaceous, while in females it is fuscous, densely grey dusted. Thorax shows some yellowish hairs. They have a very long and slender proboscis that they keep hinged under the body. The length of the proboscis is longer than the height of the head. Palpi are highly reduced. Eyes are reddish-brown and bare. Femora are reddish. Wings are hyaline, yellowish-brown at the base.
Prosena siberita is a univoltine species. Adults are harmless... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pyrénées National Park | 🇫🇷 France |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Warsaw | 🇵🇱 Poland | |
| 2 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 3 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Prosena siberita sighting in Warsaw on a given day, based on 34 verified sightings from GBIF citizen-science data. It is the 132nd 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.
August
In that month about 20% of wildlife watchers report a Prosena siberita in Warsaw on a given day, against under 5% in October to May, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Prosena siberita sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 cities where we can rate Prosena siberita sightings, Warsaw has the highest daily chance: about 10%. Next come Rotterdam [The Hague] (Netherlands, under 5%) and Moscow (Russia, under 5%).
Same family: Tachinidae
The closest relatives of the Prosena siberita that you can see in Warsaw (family Tachinidae, Tachinid Flies) are Cylindromyia bicolor (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 Prosena siberita is recorded against all the insects logged in Warsaw (34 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.
