True Flies - order Diptera

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Diptera is an order of insects that use only a single pair of wings to fly and are commonly known as True Flies. It is Ireland's largest insect group with over 3,300 known species.

Dipterans use only a single pair of wings to fly; the hindwings having evolved into small, knobbed appendages known as halteres, which act as high-speed sensors of rotational movement.