Even though bird wings do wing warp, the inspired nature of aeroflexible aerodynamics post - is more of the contribution of the flexible 'feathers' or shown acetate flaps on a RIGID airfoil that instantaneously and self-deploys (in localized/smaller separation zones) to create more drag at high angles of attack, lessening large stall dynamics. As in peregrine falcons, the drag is kept minimal as the flaps/feathers are kept tight to their rigid bodies.
...not exactly relevant to aeroflexible aerodynamics but more on self deploying flaps.