Rod Williams / Snail-killing fly (Tetanocera Sp) Sutcliffe Park Nature Reserve, Eltham, London, England, UK. August.

Rod Williams / Snail-eating fly (Trypetoptera punctulatus) Brockley Cemetery, Lewisham, London, UK. May

Nick Upton / Marsh fly / Snail-killing fly (Dichetophora obliterata) standing on a Bramble leaf, Wiltshire hedgerow, UK, September.

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

Kim Taylor / Snail-killing fly (Coremacera marginata) pair mating. Surrey, England, September.

Kim Taylor / Snail-killing fly (Coremacera marginata) pair mating, viewed from above. Surrey, England, September.

Rod Williams / Snail-eating Fly (Sciomyzidae) Lewisham, London, August

Rod Williams / Snail-eating Fly (Sciomyzidae) Lewisham, London, August

Nick Upton / A Marsh fly / Snail-killing fly (Dichetophora finlandica), nationally scarce in the UK, standing on a Woolly thistle leaf (Cirsium eriophorum), chalk grassland meadow, Wiltshire, UK, June.

Nick Upton / Marsh fly / Snail-killing fly (Limnia unguicornis) on Woolly thistle leaf (Cirsium eriophorum), chalk grassland meadow, Wiltshire, UK, July.

Nigel Cattlin / Marsh fly / snail-killing fly (Sepedon aenescens) adult on a paddy Rice (Oryza sativa) leaf, Philippines