As a result, resilin is up to 96% efficient. During wing lift, some 85% of the energy expended is stored for later; this same energy is then re-used in the downward movement that provides lift and propels the insect forward. Its chest walls and muscles have been created with a special structure to make possible this accumulation of energy. However, the energy is actually stored in the joints consisting of resilin.
It's of course impossible for an insect, by means of its own efforts, to equip itself with such an extraordinary mechanism for flight. The infinite intelligence and might of Allah has created this special resilin in the insects' bodies.
For smooth flight, straight up-and-down wing movement alone is not sufficient.. In order to be able to provide lift and propulsive force, the wings must also have to change their angle of motion during every beat. Insects' wings possess a particular rotational flexibility, depending on the species, which is provided by their so-called direct flight muscles (or DFMs, for short) that produce the forces needed for flight.