1970 Perconia strigillaria (Grass Wave)

Geometridae, Ennominae Wingspan: 30-40mm

A locally distributed species probably to the south of the UK but restricted to lowland Heathland. In Cornwall, there are only two areas where it has been recorded to the west of the county, and numbers seen are far from plentiful. It can be seen in the daytime, or will come occasionally to a light trap.

The flight season in the UK is defined as May to July, but in Cornwall it has only been recorded in June.