Hoverfly hanging out by the pond
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'Hanging out by a pond' might also suggest Helophilus hybridus, which is more closely tied to water than pendulus. However, as it is a male with a dark bar across tergite 2, and has hind tibia with distal third only dark, it is pendulus.
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Lat/Lng: 51.216653057964, -1.4640151259664
OS grid ref: SU375465