Episyrphus balteatus, also known as the Marmalade Fly or the Marmalade Hoverfly, is found in large numbers throughout the UK . It can be seen in all months of the year, although the peak abundance is in late July.
It is a very variable species with the ground colour depending on the temperature at which the larvae developed. Dark individuals are typically found earlier in the year and are associated with cooler conditions.
Larvae feed on a variety of aphid species, including crop pests such as cereal aphids and Cabbage Aphid. Marmalade Hoverflies are valued by gardeners as the adults help pollinate flowers and food crops.