Black flies

Blackflies, larva, pupa

Fig. 39. Black flies. From left: larva, pupa and adult. At the top: a leaf of an aquatic plant with black fly larvae and pupae. (Martini)

The black fly (Simuliidae) is approx. 2 mm long, powerfully built flies. They are black and often have whitish markings on the body and legs. There are fifty different species of black flies in Denmark. They all need running water. Some species mate in streams, others in brooks and ditches.