Early Thorn
Selenia dentaria
Selenia dentaria, the early thorn, is a moth of the family Geometridae. It is found in Northern Europe, and across the Palearctic to the Caucasus, Transcaucasia, North Siberia, Russian Far East, Amur and Mongolia. Source
Where it is now
No records in the last 8 weeks. It may be out of season where the observers and sensors are.
See the Early Thorn on the live map
Movement and weather
Over the weeks it was present in the past year, its centre in Europe ranged from 49°N in June to 63°N in June, about 1,500 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.
| Region | First arrival | Last arrival | Typical peak | Areas |
|---|---|---|---|---|
| Europe | 22 June 2026 | 13 July 2026 | 20 July 2026 | 3 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.