Gastrophysa polygoni
Silhouette: Birgit Lang · PhyloPic
In 3 days ~20% in a week ~40%
Gastrophysa polygoni is a species of leaf beetle in the subfamily Chrysomelinae. It was described by Carl Linnaeus in 1758. The species can be up to 5mm long and is green-blue in colour. The thorax is orange and the wing cases are a metallic green, and the beetle can be seen in spring and summer. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bishkek | 🇰🇬 Kyrgyzstan | |
| 2 | Astana | 🇰🇿 Kazakhstan | |
| 3 | Kyiv | 🇺🇦 Ukraine | |
| 4 | Kharkiv | 🇺🇦 Ukraine | |
| 5 | Warsaw | 🇵🇱 Poland | |
| 6 | Bucharest | 🇷🇴 Romania | |
| 7 | Nizhny Novgorod | 🇷🇺 Russia | |
| 8 | Novosibirsk | 🇷🇺 Russia | |
| 9 | Kazan | 🇷🇺 Russia | |
| 10 | Almaty | 🇰🇿 Kazakhstan |
With luck
About 10% of wildlife watchers report a Knotweed Leaf Beetle sighting in Bucharest on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 112th most-seen of the 361 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report a Knotweed Leaf Beetle in Bucharest on a given day, against under 5% in July–August and October–February, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Knotweed Leaf Beetle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 21
Of the 21 cities where we can rate Knotweed Leaf Beetle sightings, Bucharest ranks 6th at about 10%. The best odds are in Bishkek (Kyrgyzstan, about 30%), Astana (Kazakhstan, about 10%) and Kyiv (Ukraine, about 10%).
Same family: Chrysomelidae
The closest relatives of the Knotweed Leaf Beetle that you can see in Bucharest (family Chrysomelidae, Leaf Beetles) are Ragweed Leaf Beetle (about 10%), Elm Leaf Beetle (about 10%) and Gonioctena fornicata (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Knotweed Leaf Beetle is recorded against all the insects logged in Bucharest (16 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.
