Green Carpet

Colostygia pectinataria

Colostygia pectinataria, the green carpet, is a Palearctic moth of the genus Colostygia in the family Geometridae. It was first described by August Wilhelm Knoch in 1781. Source

Where it is now

In the last 8 weeks this insect was recorded 69 times across 7 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 19°C (typically 17 to 22°C, from 10 areas). That holds across 20° of latitude, which suggests its timing follows temperature more than the calendar.

Over the weeks it was present in the past year, its centre in Europe ranged from 48°N in May to 62°N in June, about 1,500 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.