54 BIRDS. 



211. Bernicla canadensis (Z.). Canada Goose. 



Has occasionally been observed and shot, but is now so 

 common in a semi-domesticated state on ornamental 

 waters, that it is impossible to discriminate between 

 escapes and visitants. 



212. Bernicla ruficollis (Pa/!.). Red-breasted Goose. 



Accidental visitant from Northern Asia, of extremely rare 

 occurrence. 



WyclirTe, one, winter of 1766 (Bewick, B. Birds, ii. 280). 



Tees, two " seen of late years by the Tees." One of these 

 was afterwards shot on the Durham side, in Cowpen 

 Marsh (Hogg, Zool., 1845, p. 1178). 



213. Chen albatus (Cassin). Cassin's Snow-Goose. 



Cygnus olor (Gm.). Mute Swan. 

 Domesticated. 



214. Cygnus immutabilis Yarr. Polish Swan. 



Accidental visitant (habitat unknown) of extremely rare 

 occurrence. 



Off Bridlington Pier, a flock seen in 1844 by Mr. Arthur 

 Strickland, one of which was obtained (Allis). 



Wilstrop, one shot by Mr. John Harrison, out of a party of 

 two or three, late autumn, about 1860 (Harrison, MS.). 



215. Cygnus musicus Bechst. Whooper Swan. 



Winter visitant, occurring almost annually on the coast, in 

 numbers varying with the season, much less frequent 

 inland. In severe winters large flocks are observed. 



216. Cygnus bewicki Yarr. Bewick's Swan. 



Winter visitant, less frequent and numerous than C. musicus^ 

 but still not uncommon in severe winters, when it is chiefly 

 observed in the estuary of the Humber. Much rarer 

 inland. Mr. Cordeaux remarks on the scarcity of imma- 

 ture birds (Birds of Humber, p. 158). 



