Wingspan 45-50 mm.
A highly distinctive and unusual moth, which rests with the wings folded longitudinally, looking very much like a withered autumn leaf.
The adults generally fly between May and October, in at least two generations, but can be found in any month The species is also a common migrant and can occur in large numbers at coastal locations.
It occurs throughout Britain, commonly in places, and more so in the south.
The larvae feed on a variety of herbaceous plants.