288 The Bird 
small African bird, called from its habits the Rock-jumper, 
the wings are so small that the power of flight is almost 
nil, and we find an interesting corollary in the plumage, 
Fig. 228.—Cassowary, showing the loose plumage of a flightless bird. (Sanborn, 
photographer. Courtesy of N. Y. Zoological Society.) 
which is so loose and fluffy that it blows about in the 
least wind. In the ostrich and rhea this down-like char- 
acter is still more noticeable and extends even to the 
feathers of the wings and tail. The extreme is to be found 
