Gastrophysa polygoni
Silhouette: Birgit Lang · PhyloPic
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Knotweed Leaf Beetle sighting in Vienna on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1090th most-seen of the 1406 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Knotweed Leaf Beetle in Vienna on a given day, so our monthly data shows no clear season.
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.
19th of 21
Of the 21 cities where we can rate Knotweed Leaf Beetle sightings, Vienna ranks 19th at under 5%. 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 Vienna (family Chrysomelidae, Leaf Beetles) are Colorado Potato Beetle (about 10%), Willow Clytra (about 10%) and Cassida nebulosa (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 Vienna (7 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.
