FEATHERED GIANTS 151 
deep as to give him an undue advantage in that 
respect. 
We can only speculate on the food of these 
great birds, and for aught we know to the 
contrary they may have caught fish, fed upon 
carrion, or used their powerful feet and huge 
Fig. 30. — Skull of Phororhacos Compared with that of 
the Race-horse Lexington. 
beaks for grubbing roots ; but if they were not 
more or less carnivorous, preying upon such 
reptiles, mammals and other birds as came 
within reach, then nature apparently made a 
mistake in giving them such a formidable 
equipment of beak and claw. So far as habits 
