X CONTENTS 



Family Anatidae — Continued. Page 



Whooping swan 278 



Habits 278 



Distribution 280 



Cygnus columbianus 281 



Whistling swan 281 



Habits 281 



Distribution 292 



Cygnus buccinator 293 



Trumpeter swan 293 



Habits 293 



Distribution 300 



References to bibliography 303 



Explanation of plates ; 312 



Index 373 



