Davey, P., 2009: A species confined to south-east England with scattered records elsewhere in England and Wales, the polyphagous larva feeding on a wide range of herbaceous plants. This species was considered to be solely an immigrant in the early part of the last century. From 1940 to the present time the moth has colonised much of south-east England, with numbers declining in cooler summers and increasing in warmer summers. In Dorset, the moth is widespread and frequent with a marked preference for unimproved grassland where it is often abundant. It is double-brooded, but immigrants undoubtedly augment resident populations from time to time, and these may include third generation individuals during the autumn months. The peak of the second brood is more than twice that of the first.
Recorded in 39 (98%) of 40 10k Squares.
First Recorded in 1939.
Last Recorded in 2019.
(Data up to end 2019)