Treble Brown Spot
Idaea trigeminata
Idaea trigeminata, the treble brown spot, is a moth of the family Geometridae. It is found in Europe. 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 Treble Brown Spot 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 |
|---|---|---|---|---|
| Europe | 18 May 2026 | 18 May 2026 | 25 May 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.