648 CYGNINjE. 



knob at the base black ; feet dull grey ; plumage pure white, 

 as is that of the young 



2. Cygnus musicus. Whooping Swan. About sixty inches 

 long ; bare space on the forehead, and between the eyes and 

 bill, bright yellow, as is the base of both mandibles, that 

 colour extending in an angular form on the sides of the 

 upper mandible to beyond the nostrils, the rest black ; feet 

 black ; plumage pure white, the head tinged with orange- 

 red. 



3. Cygnus Bewickii. Bewictts Swan. About forty inches 

 long ; bare space on the forehead, and between the eyes and 

 bill, bright yellow, as is the base of the upper mandible, that 

 colour extending in an angular form, but not reaching the 

 nostrils, the rest black ; feet black ; plumage pure white, the 

 head and neck tinged with orange-red. 



4. Cygnus Aniericanus. American Swan. About forty- 

 four inches long ; bill and bare space on the fore part of the 

 head black, with an oblong orange patch, never more than 

 an inch in length, between the eye and the base of the bill ; 

 feet black ; plumage pure white, the head tinged with 

 orange-red. 



