November Moth

Epirrita dilutata

The November moth is a moth of the family Geometridae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It can be found in the Palearctic realm in western Europe from central Scandinavia to the Mediterranean the Caucasus and western Russia. Source

Where it is now

In the last 8 weeks this insect was recorded 130 times across 3 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.

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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.