Carrion crow landing on flat ground by decelerating glide

　First the crow increase the lift and the drag by the enlarged angle of attack and the curve of the wing and by the opened and bent down tail, and then shifts to a low speed glide. As the crow approachs to the ground, it should go to father decelerating glide by making use of the surface effect. Finally the crow changes the decreased kinetic energy to the potential energy by making use of the inertia and then makes a soft landing by using the spring of the legs for a small high. (Prod. May 2009, scale 1/2, No.1)