Streamer

Anticlea derivata

Anticlea derivata, the streamer, is a moth of the family Geometridae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It is found in Europe, North Africa and across the Palearctic up to the Altai Mountains.It prefers to live on sunny slopes, hedge rows, bushy places as well as in gardens and parks. Source

Where it is now

No records in the last 8 weeks. It may be out of season where the observers and sensors are.

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Movement and weather

Over the weeks it was present in the past year, its centre in Europe ranged from 49°N in March to 61°N in May, about 1,400 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.