Common Emerald

Hemithea aestivaria

The common emerald is a moth of the family Geometridae. The species is found throughout the Nearctic and Palearctic regions and the Near East. It is mostly commonly found in the southern half of Ireland and Britain. It was accidentally introduced into southern British Columbia in 1973. 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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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.