Japanese Beetle

Popillia japonica

The Japanese beetle is a species of scarab beetle. Due to the presence of natural predators, the Japanese beetle is not considered a pest in its native Japan. In North America and some regions of Europe, it is a noted pest to roughly 300 species of plants. Some of these plants include roses, grapes, hops, canna, crape myrtles, birch trees, linden trees, and others. Source

Where it is now

In the last 8 weeks this insect was recorded 148 times across 5 areas (each area is a 5 degree square).

See the Japanese Beetle on the live map

Movement and weather

Each season it is first heard regularly where daytime highs are around 25°C (typically 22 to 26°C, from 6 areas).

Over the weeks it was present in the past year, its centre in North America ranged from 37°N in June to 46°N in August, about 900 km apart.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.