Great Brocade

Eurois occulta

Eurois occulta, the great brocade or great gray dart, is a moth of the family Noctuidae. It is found in northern and central Europe, North Asia and central Asia to the Pacific Ocean and Japan. Also the northern parts of North America. In addition, it is found in Greenland and Iceland. In the south in northern Spain and on the Balkan Peninsula. Source

Where it is now

In the last 8 weeks this insect was recorded 155 times across 5 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 20°C (typically 19 to 20°C, from 5 areas).

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.