KEY TO FAMILIES OF WATER BIRDS 
3 
ORDER TUBINARES: TUBE-NOSED SWIMMERS. 
1. Nasal tubes separated and at sides of bill. 
Diomedeidae : Albatrosses, p. 32. 
Procellariidae : Fulmars, 
Shearwaters, and Petrels, p. 33. 
ORDER STEGANOPODES: 
TOTIPALMATE SWIMMERS. 
1. Bill straight and sharp, not hooked at tip. 
Anhingidae : Darters, p. 39. 
1'. Bill strongly hooked at tip. 
2. Tail deeply forked; space around eye feath¬ 
ered. 
Fregatidae : Man-o’-War Birds, p. 43. 
6 2'. Tail not forked; space around eye naked. 
3. Bill narrow, with slight pouch at base. 
Phalacrocoracidae : 
Cormorants, p. 39. 
Fig. 11. 
3'. Bill wide and flat, with large pouch. 
Pelecanidae : Pelicans, p. 42. 
ORDER ANSERES: LAMELLIROSTRAL 
SWIMMERS. 
Short-legged swimmers. Anatidae : 
> Ducks, Geese, and Swans, p. 44. 
Fig. la 
