372 THE STUDY OF BIRDS /.V THE FIELD 



* Swimming and diving birds, with almost no tails. Heads peculiarly 



crested in the breeding season. Body held nearly erect when stand- 

 ing— 



— Neck short Auks, pp. 338-341. 



— Neck long Loons, p. 34-'. Grebes, p. 345. 



* Very long-winged, flying, and swimming birds, seen usually in the air 



over the water along all shores. 



— Smaller birds, with forked tails, and the head so held as to point 

 downward when flying ; \H)iees .shrill Terns, pp. 323-328. 



— Larger birds, with even tail and the head held in line with the 

 body when flying ; voices hoai-se Gulls, pp. 329-330. 



