Downy Emerald

Cordulia aenea

The downy emerald is a species of dragonfly. It is metallic green and bronze in color, and its thorax is coated with fine hairs, hence its name. Like most other emeralds, the downy emerald has bright shiny green eyes. Adults are around 5 cm (2.0 in) in length, and are in flight from May through July each year. 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 50°N in April to 61°N in July, about 1,300 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.