The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
Widespread in brackish water localities, from Kent to Hebrides, in about 30 sites.
Downgraded from RDB3.
Recorded from Trevassack Quarry on east side of The Lizard in 1981.
Habitat & Ecology
Larvae live in brackish and freshwater pools; the adults fly between May and October.
Development of the site for recreational activities.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.