STERCORARIID^E: Jaegers 



STERCORARIIDAE. Family Jaegers 



Three species are known, the Pomarine, the Parasitic, and the Long- 

 tailed. All are circumpolar in breeding-range, at other seasons widely 

 distributed, chiefly on oceans, even to Australia and southern Africa. In 

 habits all are robbers of their near relatives the Gulls and Terns, and 

 raptors and scavengers on occasion. The Pomarine, largest of the three, 

 has not been definitely recorded within our territory, though not uncom- 

 mon northward. The Parasitic occurs on large inland bodies of water 

 as well as on the ocean; and the Long-tailed, a rare bird on the southern 

 California coast, appears inland only as a straggler. 



Ocean W.V. Sept.- 

 Apr. Common. Any con- 

 siderable number of Bona- 

 parte Gulls is reasonably 

 sure to be attended by one 

 or several of these robbers. 

 Nests in Arctic regions. 



j*-> 



GULLS AND TERNS. Family Laridae 



Coastwise - Aug. Apr. 

 Common. Occasional at all 

 seasons. Nests on islands off 

 coast of Mexico. Moves north- 

 ward after breeding, reaching 

 the southern California coast 

 in considerable flocks about 

 mid-August. 



