Peppered Moth

Biston betularia

The peppered moth is a moth of the family Geometridae. It is night flying, and found mainly in temperate regions of the northern hemisphere. Peppered moth evolution is an example of population genetics and natural selection. Source

Where it is now

In the last 8 weeks this insect was recorded 10 times across 2 areas (each area is a 5 degree square).

See the Peppered Moth 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 May to 59°N in August, about 1,100 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.

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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.