White-tailed sea eagle taking off with caught fish

　From the balance of the moments, the sum of the moments in relation to the center of gravity for the three foces ; the force that the surrounding air exerts on the bird, the force that the caught fish pulls the bird's legs, and the inertia force acting on the bird and the fish, must be zero. Since the eagle must take off after it has decelerated to catch the fish, the fish able to carry will be not so large. (Prod. Jun. 2006, scale 1/2, No.1)