A honey bee's wings are not driven by muscles attached directly to them. Instead, two sets of indirect flight muscles fill the thorax box: dorsoventral muscles (DVM) run top-to-bottom, and dorsolongitudinal muscles (DLM) run front-to-back. When the DVM contracts it pulls the top plate (tergum) down, bowing the thorax walls outward and snapping the wings up. When the DLM contracts it shortens the box, arching the tergum back up and snapping the wings down. The two sets pull against each other in turn, like a mechanical spring-loaded box being squeezed from two directions.
A bee's indirect flight muscles can contract over 200 times a second even though the motor neurons driving them fire only a handful of times per second — the muscle itself, not the nervous system, sets the wingbeat rhythm.
A cutaway 3D thorax reveals the antagonistic indirect flight muscles that click a bee's wings up and down, the nerve pulses that fire far slower than the wingbeat itself, and the sugar and fat reserves that fuel and warm the engine.
Dorsoventral and dorsolongitudinal muscles stretch-activate each other to snap the elastic thorax between two shapes, producing a wingbeat far faster than the sparse nerve pulses that trigger it — the hallmark of asynchronous flight muscle.
Switch activity mode between resting, shivering warm-up and sustained flight, adjust wingbeat frequency and ambient temperature, and pick whether nectar sugar or body fat is fuelling the muscles. Watch the reserve bars, thoracic temperature and power output respond.
A bee's flight muscles can contract over 200 times a second while the motor neurons driving them fire only a handful of times per second — the muscle tissue itself sets the rhythm, not the nervous system.