160 



BRANCH YERTEBRATA. 



Cockatoos are forms often seen in our menageries. 

 They differ from parrots in being feathered to the bill. 



FIG. 271. 



\ s ^- i > / >"" i ii', : . 



; ; ; f' '.:,; ^ --; 

 - ~~" 



Cacut'ua sulphu'rea. Sulphur crested Cockatoo. 



One genus is distinguished for its size, 

 and its erectile, sulphur-colored crest, 



but especially for its longevity individuals having -lived 



in captivity more than a hundred years.' 



