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 Nanjing on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 150th most-seen of the 272 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.
March to June
In those months about 10% of wildlife watchers report a Japanese Knotweed Leaf Beetle in Nanjing on a given day, against under 5% in July to February, 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, Nanjing ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Sendai (Japan, about 10%).
Same family: Chrysomelidae
The closest relatives of the Japanese Knotweed Leaf Beetle that you can see in Nanjing (family Chrysomelidae, Leaf Beetles) are Oides decempunctata (about 10%), Alligatorweed Flea Beetle (about 10%) and Cassida japana (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 Nanjing (10 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.
