External images
For terms see Morphology of Diptera
Wing length 6-8·5 mm. Face with conspicuous central knob. Legs partly yellow or orange. Scutellum without margin bristles. Wing with central cross veins darkened and with dusky clouds on anterior part. Antennae with third segment rounded and pale with dark tip.[4][5][6]
Habitat Wetlands, woodlands, Alnus and Salix carr and poorly drained scrub (Prunus spinosa). Flowers visited include Crataegus, Prunus, Salix, Taraxacum and Tussilago. Flies from the end of April to beginning June (later at higher altitudes).[9][10]
^Ball, S.G.; Morris, R.K.A. (2000). Provisional atlas of British hoverflies (Diptera, Syrphidae). Monks Wood, UK: Biological Record Centre. pp. 167 pages. ISBN1-870393-54-6.
^Van Veen, M. P. (2004). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae (hardback). Utrecht: KNNV Publishing. p. 254. ISBN90-5011-199-8.
^Van der Goot,V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no.32: 275pp. Amsterdam.
^Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to the Insects of the European Part of the USSR, Volume V: Diptera and Siphonaptera, Part I. Amerind Publishing Co., New Delhi. ISBN81-205-0080-6.
^Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdfArchived 2018-10-04 at the Wayback Machine
^Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
^de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het
bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167.