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 1s impossible to discriminate between 
escapes and visitants. 
212. Bernicla ruficollis (Pa//.). Red-breasted Goose. 
Accidental visitant from Northern Asia, of extremely rare 
occurrence. 
Wycliffe, 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 ZBechst. 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. muszcus, 
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). 
