Prosena siberita
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Prosena siberita sighting in Moscow on a given day, based on 37 verified sightings from GBIF citizen-science data. It is the 286th most-seen of the 1111 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.
July and August
In those months about 10% of wildlife watchers report a Prosena siberita in Moscow on a given day, against under 5% in September to June, 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.
3rd of 3
Of the 3 cities where we can rate Prosena siberita sightings, Moscow ranks 3rd at under 5%. The best odds are in Warsaw (Poland, about 10%) and Rotterdam [The Hague] (Netherlands, under 5%).
GBIF citizen-science records
It is estimated from how often the Prosena siberita is recorded against all the insects logged in Moscow (37 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.
