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Pale bands on the tibiae are found in all species of Eristalis other than tenax, so I don't think that points to nemorum, really. There is not really enough visible to key this in terms of
nemorum/abusivus/horticola/arbustorum, is there?
My Flickr photos...
Lat/Lng: 52.6058, 1.4467
OS grid ref: TG334064