Distribution and Abundance: Common.

Primary Habitat: Woodland.

Flight Period: Single brooded in March and April.

Observations: Extreme variation of the species is rare in the county. The only example that I have seen is a dark suffused form of the male that was taken on 13 March 1993 at Kirtley Coppice. In the exceptionally early season of 2005 a moth was taken on 31 January in the Pitsford Reservoir light traps.

L.O.N.: 1906. Kettering, Brigstock, Northampton. Not uncommon.

First Record: 1842, Clark.