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St Mark's Fly - Bibio marci - Hawthorn Fly

The male is about 12 mm and the female 14 mm. This is quite a hairy black insect. The males have large bulbous eyes and a rather tubular segmented body and black legs. The females have smoky wings and much a smaller head and eyes. The front legs have a stout spine at the tip of the tibia

Bibio johannis

Length 4 to 7 mm. A black fly with shiny black thorax. The head and legs are both very hairy. The male has a very prominent dark stigma in each wing, and the lower parts of the legs are orange.

Habitat

Grassland and well vegetated areas and hedgerows and also over water.