Weevil
Cyrtepistomus castaneus
Cyrtepistomus castaneus, the Asiatic oak weevil, is a species of Asian broad-nosed weevil in the beetle family Curculionidae. It is native to Asia, and was first found in North America in 1933. Larvae feed on root hairs in soil, whereas adult beetles are defoliators of Quercus and Acer rubrum trees. Source
Where it is now
In the last 8 weeks this insect was recorded 21 times across 2 areas (each area is a 5 degree square).
See the Weevil on the live map
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.
| Region | First arrival | Last arrival | Typical peak | Areas |
|---|---|---|---|---|
| North America | 8 June 2026 | 8 June 2026 | 29 June 2026 | 1 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.