Distribution and Abundance: Very common.

Primary Habitat: General occurrence.

Flight Period: Records extend from April to November, usually peaking in late summer.

Observations: Extremely variable in abundance, Fineshade Rothamsted light trap records show the following captures: 1993 - 8, 1994 - 51, 1995 - 8, 1996 - 239, 1997 - 7, 1998 - 22 and 1999 - 8. This variability is underlined by data from the Pitsford Reservoir light traps for the five years from 1999 - 2003 where the catches were as follows:- 1999 - 55, 2000 - 113, 2001 - 52, 2002 - 29 and 2003 - 158.

L.O.N.: 1907. Everywhere. Abundant.

First Record: 1842, Clark.