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Black flies


Black flies are tiny, stocky flies from 1.4 to 6 mm long. Despite their name, their colour varies depending on the species. Their convex thorax gives them a characteristic humpbacked appearance. The six fairly short legs have white bands in certain species.

The females’ abdomens, which absorb blood meals, are particularly expandable. Their short, sharp mouthparts are adapted to cutting through skin and sucking up blood.

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