Small Dusty Wave

Idaea seriata

The small dusty wave is a moth of the family Geometridae first described by Franz von Paula Schrank in 1802. It is found throughout Western, Central and Northern Europe. In the north, its range extends as far as Denmark and southern Scandinavia. In the east its range extends as far as Russia. Idaea seriata is replaced by the subspecies Idaea seriata canteneraria, from the north-east of Spain and the central and eastern Mediterranean to the Crimean peninsula, while the western Mediterranean and the Balearic Islands are inhabited by the sister species Idaea minuscularia. Outside Europe it is found in eastern Algeria, Tunisia, Turkey, Cyprus, the Caucasus and the northwest of Transcaucasia. In Morocco and western Algeria, it is replaced by the sister species Idaea minuscularia. In the British Isles it is common in England and Wales but is only found in the eastern half of Scotland and it is rare in Ireland. Source

Where it is now

In the last 8 weeks this insect was recorded 176 times across 9 areas (each area is a 5 degree square).

See the Small Dusty Wave on the live map

Movement and weather

Over the weeks it was present in the past year, its centre in Europe ranged from 46°N in April to 59°N in July, 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.

Download every area as CSV

Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.