Flies are insects of the order Diptera, the name being derived from the Greek. Insects of this order use only a single pair of wings to fly, the hindwings having evolved into advanced mechanosensory

Flies are insects of the order Diptera, the name being derived from the Greek. Insects of this order use only a single pair of wings to fly, the hindwings having evolved into advanced mechanosensory - 173628833

A blue dragonfly sits on a blade of grass in the morning sun.

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