68 



GAXNETS. 



high in the air as it plunges into it. In mi- 

 grating the Gannet moves in irregular, strag- 

 gling lines without system. 



BLUE-FACED GANNET. 



Differs from the Gannet in being much 

 smaller, 28, and in having the most of the 

 wings and tail (except the central feathers 



Fig. 42. 



Tropic Bird. 1-6. 



and base which are white) dark-brown. The 

 naked portions of the face are blue. Young, 

 with the head, neck, and upper parts dark- 



