This a view inside the body of a mosquito. Mosquitos and flies (Diptera) have very special flight muscles that enable these insects to make high-frequency wing beats. These muscles don't power the wings directly. The wings are connected to the insect's abdomen which can change shape causing the wings to beat up and down. A separate system of muscles changes the position of the wings so that very subtle manouvres can be made. Some flies, like the hoverflies, can hang still in mid-air.