Nick Upton / Thick-legged hoverfly (Syritta pipiens) nectaring on Common fleabane (Pulicaria dysenterica), Dorset, UK, July.

Rod Williams / Thick-legged Hoverfly (Syritta pipiens) showing a characteristic swollen hind femur Brockley Cemetery, Lewisham, London, England, UK August.

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

Rod Williams / Thick-legged hoverfly (Syritta pipiens) on petal, Lewisham, London, UK, June.

Rod Williams / Thick-legged Hoverfly (Syritta pipiens) feeding on ox-eye daisy Lewisham, London, England, UK, June.