BRITISH BIRDS. 



273 



, BEWICK'S SWAN. 



(Cygnus Beivickii, Yarrell. Cygne dc Bewick, 

 Temm. 



THIS species is about one third less than the 

 Hooper (Cygnus ferus) at the same age. Length 

 four feet two inches, breadth six feet nine inches: 

 the bill is about three inches long: the protu- 

 berance or knob at the base of the upper mandible 

 pale orange ; from thence to the tip black : nostrils 

 oblong and opaque: irides orange yellow. The 

 whole plumage is of a pure white, except the fore 



VOL. II. 



2 M 



