230 



The Bird 



each r.n iixUvidual method — a niche into which it fits 

 perfectly in tlie great scheme of Earth's hungry creat- 

 ures. The snake-bird's prey is in the water of dense 



Fig. 1(>S. — Brown Pelican eatcliing fish, showing bag-like distension of lower 

 mandible. (Sanborn photographer. Courtesy of N. Y. Zoological Society.) 



swamps and bayous; cormorants and peHcans amicably 

 share inland lakes and tidal waters; while the haunt of 

 the gannet is the high seas. 



Even moi'c closely related to each other are terns 



