This bird is in a characteristic posture known as “hock-sitting”, in which the bird rests on its hocks, with the back arched and both legs extended forwards and spread laterally (Fig. 08.04.01 and Fig. 08.04.02 in the book). Paralysis of the hind limbs is symmetrical. The wings are usually not paralysed. This bird is flapping its wings in a vain attempt to move forwards.