230 The Bird 
each an individual method—a niche into which it fits 
perfectly in the great scheme of Harth’s hungry creat- 
ures. The snake-bird’s prey is in the water of dense 
a 
Fic. 168.—Brown Pelican catching fish, showing bag-like distension of lower 
mandible. (Sanborn. photographer. Courtesy of N. Y. Zoological Society.) 
swamps and bayous; cormorants and pelicans amicably 
share inland lakes and tidal waters; while the haunt of 
the gannet is the high seas. 
Even more closely related to each other are terns 
