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Anthomyia procellaris
A mostly white fly with black spikes(tufts of hair) and faint black lines.
Spotted in backyard.
Root-maggot flies are found worldwide. There are around 1,200 species globally and 220 in Central Europe. Root-maggot flies are small to medium in size and often have strong bristles. Some species have striking patterns in grey and black, others have yellow abdomens or yellow legs, however most species of root-maggot flies are rather unremarkable in appearance. Root-maggot flies prefer to live on flowering plants, where they feed on the nectar and pollen. However, they also sometimes feed on liquid manure, sweat, blood or the watery discharge from wounds. Some species live on rotting seaweed, others reside in the nests of bees or wasps, where they eat the food reserves of their hosts or the unwanted remains of these.