Tabanus sudeticus
Encyclopedia
Tabanus sudeticus also known as the dark giant horsefly is a species of biting horse-fly
Horse-fly
Insects in the order Diptera, family Tabanidae, are commonly called horse flies. Often considered pests for the bites that many inflict, they are among the world's largest true flies. They are known to be extremely noisy during flight. They are also important pollinators of flowers, especially in...

. It is the heaviest fly in Europe.
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