KEY TO FAMILIES. WATER BIRDS. 



15 



Lores, feathered; tarsus, reticulate (scales rounded) ; wing, more than thirteen inches long; 

 toes, four, the front ones full webbed. 



Family ANATID/E. Subfamily ANSERIN/E. Geese and Brant. 



See page 81. 



Geese and Swan. 



Lores, partly bare; tarsus, reticulate (scales rounded) ; size, large; neck, long; wing, over 

 eighteen inches long; plumage, white or gray. Subfamily CYGNIN/E. Swans. 



See page 84. 



GROUP 3. 



Toes, four, toto=palmate ; (front toes, full webbed;) 

 hind toe, connected with front ones by web. 



Bill, sharp pointed; chin, feathered; toes, four, all connected uy webs. 



Family PHAETHONTID/E. Tropic Birds. 



See page 60. 



Bill, stout, but not hooked; chin, bare; neck, thick; toes, four, all connected by webs. 



Family SULID/E. Gannets. 



See page 61. 



