Cataclysta lemnata (Linnaeus, 1758)
63.1160 (B&F: 1354)
A resident species often common to very common near ditches, ponds, lakes and dykes. Well distributed within a few miles of the East Sussex coast but less so elsewhere. Extremely local in high numbers. Single-brooded, flying mainly from the second week of May to mid September, sometimes to late September. Larvae feed on duckweed and frog-bit. (Pratt, 2011).