Pal Hermansen / Hoverfly in flight, backlight, Norway, September.

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

Jussi Murtosaari / Flies (Brachycera) on leaf, Parikkala, Etela-Karjala / South Karelia, Etela-Suomi / South Finland, Finland. June

Jussi Murtosaari / Fly (Brachycera) on Lily of the Valley berries, Parikkala, Etela-Karjala / South Karelia, Etela-Suomi / South Finland, Finland. September

Nick Upton / Two female Drone flies (Eristalis tenax) laying eggs in a damp hollow log at the margin of a pond, Wiltshire, UK, May.

Chien Lee / Rothschild's Slipper Orchid (Paphiopedilum rothschildianum) flower showing bristles that are believed to mimic an infection of aphid insects, thereby luring predatory syrphid flies which act as pollin...

Michael Hutchinson / Wide angle shot of a female Goldenrod spider (Misumena vatia) on Annual honesty (Lunaria annua) flower, with flies flying nearby, Bristol, England, UK, April.