150 TWEICTIETH CEKTtJRY CLASSICS 



VII. Heron Family (Herodiones) . 



Heron. 



VIII. Crane Family {Aiectorides) . 

 Crane. Rail. 

 Ooot. 



IX. Family of Geese and Ducks {Lamellirostres) . 



Domestic D ticks and Geese. Wild Ducks and Geese. 



X. Totipalmate Swimmers {Steganopodes). 



Pelican. Oomorant. 



XI. Long-winged Swimmers (Longipennes). 



Gull. Tern. 



XII. Diving Birds (Pygopodes). 



Grebe. 



