Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

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.

Parasyrphus nigritarsis

Range & Status

The status of this species in Britain is amibiguous, with few records: from Speyside and possibly in Aberdeenshire in 1930s, from Pembrokeshire and a garden in Cardiganshire in 1987-88, in Cornwall in 1980.

Regional Distribution

Recorded at Crousa on The Lizard in September 1980.

Habitat & Ecology

Occurs in the vicinity of broadleaved woodland, with adults in May and June. On the

Continent larvae predate larvae of Chrysomelid beetles, changing host species with

increasing size.


Loss of native woodland and adjacent rides and grassland.


The Cornish record was in the Lizard National Nature Reserve. Listed (UK BAP long list) as a globally threatened/declining species (BSGR, 1995) but does not appear to be on the UK BAP Priority Species list (2007).


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.

Cornish Biodiversity Network. 2017.