44 KNOWING BIRDS THROUGH STORIES 



on the top of the bill during the breeding season. The 

 pelican is one of the largest of North American birds. He 

 is still found in numbers in the Yellowstone National Park, 

 where he nests on the islands in the Yellowstone Lake, and 

 at isolated localities in the Western United States. 



Key to the Families of Steganopodes 



PHAETHONTID.S Tropic-birds. 



With the head wholly feathered and the nostrils easily seen. 



ANHINGIM: Anhingas. 



With the head not wholly feathered, the nostrils not easily seen, the 

 bill slender and sharply pointed, the tail and its feathers rounded. 



SuLiDvE Gannets and Boobies. 



With the bill stout but not hooked, the tail more or less wedge- 

 shaped and its feathers more or less pointed, 



FREGATID.X Man-o'-War Birds. 



With bill distinctly hooked, tail forked, and space around eye feathered. 



PELECANIOE Pelicans. 



With bill having a large pouch beneath, extending: to the tip of the 

 lower mandible. 



PHALACROCORACIOK Cormorants. 



With bill narrow and distinctly hooked, a small throat pouch not 

 extending to the middle of lower mandible and the tail not forked. 



Fully Webbed Foot of one of the STEGANOPODES 



