Gallerucida bifasciata
In 3 days ~20% in a week ~40%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Japanese Knotweed Leaf Beetle sighting in Hangzhou on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 126th most-seen of the 172 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–June and November
In those months about 10% of wildlife watchers report a Japanese Knotweed Leaf Beetle in Hangzhou on a given day, against under 5% in July–October and December–March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Japanese 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.
Among the best
Of the 5 cities where we can rate Japanese Knotweed Leaf Beetle sightings, Hangzhou ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Sendai (Japan, about 10%) and Nanjing (China, about 10%).
Same family: Chrysomelidae
The closest relatives of the Japanese Knotweed Leaf Beetle that you can see in Hangzhou (family Chrysomelidae, Leaf Beetles) are Cassida japana (about 10%), Odontoedon fulvescens (about 10%) and Green Tortoise Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Knotweed Leaf Beetle is recorded against all the insects logged in Hangzhou (6 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.
