Stephen Dalton / Dronefly (Eristalis similis) taking off from Snapdragon (Antirrhinum) flower, UK

Phil Savoie / Common dronefly (Eristalis tenax), feeding on Ox-eye daisy (Leucanthemum vulgare), Monmouthshire, Wales, UK. May

Nigel Cattlin / Drone fly (Eristalis tenax), a bee mimic, on leaf. England, UK.

Heather Angel / Drone fly (Eristalis tenax) nectaring on Snowdrop (Galanthus nivalis), pollen on body. Surrey, England, UK. February.

Rod Williams / A mating pair of drone flies (Eristalis tenax), Brockley Cemetery, Lewisham, England, June

Will Watson / Tapered dronefly (Eristalis pertinax), female on Ivy flower (Helix hedera), Herefordshire Plateau, England, UK, November.

Dave Bevan / European hoverfly (Eristalis pertinax) nectaring on a dahlia flower, Carmarthenshire, Wales, UK. September.

Nick Upton / Green-veined white butterfly (Pieris napi) nectaring on and flying around Saw-wort (Serratula tinctoria) flowers, with a Drone fly (Eristalis tenax) also landing briefly, Lower Woods Gloucestershire W...

Nick Upton / Close up of a Drone fly (Eristalis tenax) nectaring on a Greater knapweed (Centaurea scabiosa) flower, Wiltshire, England, UK, July.

Nick Upton / Drone fly (Eristalis tenax) nectaring on Bramble flowers (Rubus plicatus), Lower Woods Gloucestershire Wildlife Trust reserve, England, UK, July.

Alex Hyde / Tapered drone fly (Eristalis pertinax) on Ivy (Hedera helix) flowers. Peak District National Park, Derbyshire, UK, November.

Nick Upton / Common drone fly (Eristalis tenax) nectaring on Wild marjoram (Origanum vulgare) flowers in a chalk grassland meadow, Wiltshire, England, UK, August.