APPENDIX. 341 



variation of the Mute Swan (C. olor). None of the 

 characters attributed to it are constant. The white cygnets, 

 supposed to be a peculiarity of the Polish Swan, are not 

 infrequently found among broods of ordinary darker birds. 

 All, or nearly all, the recorded examples have been noticed in 

 the British Islands. 



Cygnus columbianus. WHISTLING SWAN. 



Anas COlumbianus Ord in Outline's Geogr. 2nd Amer. 

 ed. 1815, p. 319 : Columbia River. 



Cygnus americanus Sharpless ; B. O. IT. List, 1st ed. 1883, 



p. 120. 

 Cygnus columbianus (Ord) ; \Salvadori, Cat. Birds B. M. xxvii. 



1895, p. 32 ; Saunders, Manual, 2nd ed. 1899, p. 416. 



An example obtained from an Edinburgh poulterer by 

 Macgillivray, Feb. 1841, was said to have been shot in 

 the south of Scotland. 



This Swan breeds in Arctic America from Alaska to Hud- 

 son Bay, and winters farther south, chiefly on the Atlantic, 

 Gulf, and Pacific coasts of the United States. 



Cygnus buccinator. TRUMPETER-SWAN. 



Cygnus buccinator Richardson in Swainson & Richardson, 

 Fauna Bor.-Amer. ii. 1832, p. 464 : Hudson Bay. 



Cygnus buccinator Richard. ; B. O. IT. List, 1st ed. 1883, 

 p. 121 ; Salvadori, Cat. Birds B. M. xxvii. 1895, p. 33 ; 

 Saunders, Manual, 2nd ed. 1899, p. 416. 



An immature bird, shot at Aldeburgh, Suffolk, Oct. 1866, 

 and now in the Ipswich Museum, was believed by Prof. 

 Newton to be referable to this species. 



The Trumpeter-Swan breeds between the Rocky Mountains 

 and Hudson Bay and formerly nested south to Indiana and 

 Missouri. Its winter range extends southwards to Texas 

 and southern California. 



