Tube-nosed Swimmers 



to be ever on the wing, though their webbed feet indicate that 

 they must be good swimmers when they choose. Hardly any 

 birds are less known than all these ocean roamers and their kin 

 that come to land only to nest. The nest and eggs of the com- 

 mon shearwater, that wanders over the whole Atlantic from 

 Greenland to Cape Horn and the Cape of Good Hope, that sailors 

 often see in flocks of thousands, have yet to be discovered. 

 Petrels burrow holes in the ground like bank swallows. 



Greater Shearwater. 



Wilson's Stormy Petrel. 



Leach's Petrel. 



66 



