Great Oak Beauty
Hypomecis roboraria
Hypomecis roboraria, the great oak beauty, is a moth of the family Geometridae. The species occurs in the Palearctic. The nominate subspecies is found in Europe. The subspecies isabellaria is found in western Central Asia east across Siberia and Mongolia to northern China. Source
Where it is now
In the last 8 weeks this insect was recorded 7 times across 2 areas (each area is a 5 degree square).
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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 | 1 June 2026 | 8 June 2026 | 22 June 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.