St Marks Fly (Bibio marci) * female*

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Other Names
Hawthorn Fly
Description
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.

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Habitat
Hedgerows and woodland edge, often in moist areas.
When to see it
Named after St. Marks day, 25th April, when they appear with amazing regularity. April – June.
Life History
When airborne, they fly in a sluggish manner above hedgerows and grass, with their long legs dangling down. The larvae feed on grass roots, leaf mould and decaying matter.

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