True flies are insects of the order Diptera. Their most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of hind wings on the metathorax.
Fly
True flies are insects of the order Diptera. Their most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of hind wings on the metathorax.