Tephritis bardanae
In 3 days ~10% in a week ~20%
Tephritis bardanae is a picture-winged fly of the family Tephritidae, which are variously known as fruit-flies (North America) or gall flies (Britain and Ireland). The larvae feed in the flower-heads (capitula) of species of Arctium (burdocks), causing galls to form.
The larvae pupates in autumn, forming a black puparium. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Stockholm | 🇸🇪 Sweden | |
| 3 | Brussels | 🇧🇪 Belgium | |
| 4 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 5 | Kazan | 🇷🇺 Russia | |
| 6 | Yekaterinburg | 🇷🇺 Russia | |
| 7 | London | 🇬🇧 United Kingdom | |
| 8 | Saint Petersburg | 🇷🇺 Russia | |
| 9 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Burdock Fly sighting in Kazan on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 147th most-seen of the 183 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.
June and October
In those months about 10% of wildlife watchers report a Burdock Fly in Kazan on a given day, against under 5% in July–September and November–May, the lowest months.
5th of 9
Of the 9 cities where we can rate Burdock Fly sightings, Kazan ranks 5th at under 5%. The best odds are in Helsinki (Finland, about 10%), Stockholm (Sweden, about 10%) and Brussels (Belgium, about 10%).
Same order: Diptera
The closest relatives of the Burdock Fly that you can see in Kazan (order Diptera, Flies) are Common Drone Fly (about 10%) and Marmalade Hover Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Burdock Fly is recorded against all the insects logged in Kazan (5 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.
