AVES 



181 



Authorities differ as to whether the different forms all belong to the 

 same species or not. 



FIG. 114. African or two-toed ostrich, Struthio camelus. (Photograph by William 

 Graham, from Jordan and Heath, Animal Forms.) 



It is the largest living bird, sometimes reaching a height of 8 

 feet and weighing 300 pounds. The head and neck are nearly 



