WOODPECKERS. 



201 



flight/' observes Mr. Yarrell, " sufficient to trans- 

 port the bird from tree to tree, are all that it 



GREAT SPOTTED WOODPECKER. 



seems to require : large pectoral muscles, with a 

 deep keel to the breast-bone, would to this bird 

 be an inconvenience. The advantage of a narrow, 

 shallow keel is immediately apparent, on looking 



