TUBE-NOSED SWIMMERS. 47 



ing the wings longer and more pointed, and 

 in the smoother, more gliding flight. The 

 color above is sooty brown, but this looks 

 nearly black at a distance. The under parts 

 are white, and this extends up on the sides 



Fig. 33. 



Greater Shearwater. 1-d. 



of the head, witha sharp line of demarkation 

 between it and the black. The under part 

 of the wing is white, with axillaries broadly 

 banded with black. This is easily seen when 

 the bird flies near. The bill is black, but the 



