Gallerucida bifasciata
In 3 days ~60% in a week ~90%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report a Japanese Knotweed Leaf Beetle sighting in Nikko National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 86 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
May
In that month about 50% of wildlife watchers report a Japanese Knotweed Leaf Beetle in Nikko National Park on a given day, against under 5% in March and September–November, 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.
Only Nikko National Park, in our data
Nikko National Park is the only park on Wallace's Line with enough records to rate Japanese Knotweed Leaf Beetle sightings: about 30% of wildlife watchers there report one on a given day.
Same order: Coleoptera
The closest relatives of the Japanese Knotweed Leaf Beetle that you can see in Nikko National Park (order Coleoptera, Beetles) are Japanese Earth-Boring Dung Beetle (about 30%), Asian Lady Beetle (about 30%) and Miyama Stag Beetle (about 30%), 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 Nikko National Park (18 verified sightings from 2019 to 2026), 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.
