BIRDS. 



357 



ORDER II. RASORES (Scratching Birds). 



These, like all the remaining birds, have a keeled sternum. 

 They have a weakly curved beak, feet well fitted for run- 

 ning, with three toes in front, and a fourth at a higher 



FIG. 151. South American ostrich or nandu (Rhea americana). From Liitken. 



level behind. Here belong the grouse, the pheasants, and 

 the domestic -fowl and turkeys, as well as a considerable 

 number of tropical forms. Our common hens, in all their 

 numberless varieties, are descendants of the wild fowl of 

 India. The turkeys are natives of America. 



