Season (Adult / Immature):
National Status: Common
Local Status: Fairly common and widely distributed resident.
Local Record: Grade 1 See here for explanation
Flight time: Jun-mid Sep.
Foodplant: Various aquatic plants and pondweed.
|Year first recorded||1885||1995||1885|
|Year last recorded||2010||2010||2010|
|Number of records||332||106||876|
|Number of individuals||486||150||1272|
For the region, we have a total of 876 records from 328 sites. Earliest record on file is in 1885.
For further information refer UK Moths.
Davey, P., 2009: A widespread species in Britain, the larva feeding beneath the surface of ponds and lakes on pondweeds (Potamogeton spp.), frogbit (Hydrocharis morsus-ranae), bur-reeds (Sparganium spp.), water-lily (Nymphaceae) and other aquatic species. In Dorset, the moth is frequent locally in pond and slow-flowing river habitats where broad-leaved pondweed (Potamogeton natans) is dominant, and in acid mire where bog pondweed (Potamogeton polygonifolius) grows.
The national norm is for a single brood from late June to August, but a partial bivoltine cycle is suspected in Dorset, with two overlapping broods between early June and mid-September, much as occurs on the Continent. The moth occasionally flies some distance away from its core watery habitat.