Identification difficulty = 4.
according to Ball & Morris, 20241
Syrphus latilunulatus Collin in Coe(1953)2, Metasyrphus latilunulatus (Collin) in Stubbs & Falk (1983)3.
The larva is aphidophagous and has been found on Creeping Thistle Cirsium arvense. Adult requirements are little known, but most records refer to conifer woods, with acid heathlands and wetlands also mentioned. It has been found visiting yellow composites, spurges Euphorbia sp., Bog Asphodel Narthecium ossifragum, sallows Salix sp., Rowan Sorbus aucuparia and chickweeds Stellaria sp. and has also been recorded from a garden Malaise trap.
The following plots show the number of unique records per week that were not reported to be of eggs, larvae or pupae.
Was listed as 'Notable' by Falk, 19914, but dropped from this status by Ball & Morris, 20145 who consider it LOWER RISK.
Records are few and widely scattered; misidentifications are a problem, and it may be overlooked amongst large numbers of similar black and yellow hoverflies. There is a possibility that this could be a rare migrant/vagrant. Large scale movements apparently occur out of Scandinavia in August/September. Most records are from southern and central England with a few scattered records north to Sutherland.
The following plots show the Frescalo TFactor vs year and a map of the rescaled frequency (all records) for the species. For an explanation see here.
Ball, S., & Morris, R. (2024). Hoverflies of Britain and Ireland. WILDGuides (3rd ed.). Oxford: Princeton University Press. ↩
Coe, R. (1953). Diptera: Syrphidae. Handbooks for the Identification of British Insects, 10(1), 1–98. ↩
Stubbs, A., & Falk, S. (1983). British Hoverflies: An Illustrated Identification Guide (1st ed.). Reading: BENHS. ↩
Falk, S. (1991). A review of the scarce and threatened flies of Great Britain. ( No. 39). Research and Survey in Nature Conservation (pp. 1–194). Peterborough: NCC. ↩
Ball, S., & Morris, R. (2014). A review of the scarce and threatened flies of Great Britain. Part 6: Syrphidae. ( No. 9). Species status (pp. 1–130). Peterborough: JNCC. ↩