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

Stephen Dalton / Hoverfly (Volucella bombylans) feeding on flower. This species is a Bumblebee mimic, UK

Stephen Dalton / Hoverfly (Syrphus ribesii) feeding on (Cynara sp) flower, UK.

Wild Wonders of Europe / Giesbers / Mountain daisy (Leucanthemum adustum) flower with a fly on it, Liechtenstein, July 2009

Kim Taylor / Large white / Cabbage white butterfly {Pieris brassicae} female flies from broccoli flower UK.

Dietmar Nill / Bumblebee flies from Lamium flower (Spotted deadnettle) Germany

Heather Angel / Common bee fly (Bombylius major) hovering whilst nectaring on Honesty (Lunaria annua), proboscis covered with pollen. Nature reserve, Surrey, England, UK. March.

Heather Angel / Flies feeding in Veitch's peony (Paeonia veitchii). Near Bamei, Sichuan Province, China.

Heather Angel / Cat's whiskers / Black bat flower (Tacca chantrieri). Pollinated by flies. Cultivated in glasshouse, Surrey, England, UK. Native to Southeast Asia.

Heather Angel / Cat's whiskers / Black bat flower (Tacca chantrieri). Pollinated by flies. Cultivated in glasshouse, Surrey, England, UK. Native to Southeast Asia.

Heather Angel / Fly (Diptera) feeding on Pink cinquefoil (Potentilla nitida). Flies are main pollinators in Dolomites, becoming active at lower temperatures than bees. Dolomites, Italy, July.

Nick Upton / Buff-tailed bumblebee (Bombus terrestris) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland meadow, flies off, Wiltshire, England, UK, June.