I04 THE MIGRATIONS OF BIRDS 



so seldom during the season of migration that we 

 may wonder how wandering birds come to them. 

 E. A. Preble has called attention to the fact that, 

 during the seasons when most of the small birds are 

 migrating, the beaches of the Pribilofs are crowded 

 with thousands of fur seals and sea lions, gathered 

 in noisy herds whose roaring and bellowing in com- 

 bined chorus produces a clamor that is audible dis- 

 tinctly at a distance of several miles. There is no 

 question, he states, that many feathered wanderers 

 are guided by these uncouth sounds to a haven 

 where they may rest and recuperate. Casual visi- 

 tants among land birds found here must be consid- 

 ered as true strays, since these lonely islands do not 

 lie in any regular migration path except for some 

 groups of sea fowl. All land birds found, therefore, 

 are storm blown or lost from some other cause. Even 

 the yellow wagtail and willow warbler, which cross 

 each year from Asia to nest in Alaska, travel by 

 some other route, since they have not as yet been 

 recorded from the Pribilofs. 



Birds of strong flight often appear at points far 

 distant from their customary haunts. The ruff of 

 Europe has been recorded on several occasions 

 from Barbadoes, Trudeau's tern of Argentina and 

 Uruguay has been found in New Jersey, and the 

 Bartramian sandpiper has been taken in New 

 Zealand. 



