CASUAL RECORDS 103 



included the American pipit, the yellow-billed and 

 black-billed cuckoo, the American duck-hawk, the 

 blue-winged teal, the green-winged teal, American 

 widgeon, ring-necked duck, bufflehead, hooded mer- 

 ganser, American bittern, and a long list of shore- 

 birds from North America. 



Small islands are even more productive, since they 

 offer havens to birds blown to sea. In 191 1 I found 

 three individuals of an Asiatic bunting {Hypocentor 

 rustled) on the island of Kiska in the outer Aleutian 

 chain, two of them dead and the third flitting about 

 in the grass. The Pribilof Islands in Bering Sea have 

 yielded a considerable number of birds that have 

 come as strays, since of the total list of 137 forms 

 recorded up to 1923, there are 80 which are of 

 purely casual occurrence. These include a consider- 

 able number of Asiatic birds that have been found 

 nowhere else in the area included in the limits of the 

 list of North America. The majority of these strays 

 are birds that breed in northeastern Asia, which 

 have wandered from their usual track toward the 

 south. Among them may be mentioned the widgeon, 

 falcated teal. Old World forms of the golden-eye and 

 pintail, a cuckoo, the brambling, swift, Japanese 

 hawfinch, and sea eagle. These islands lie in a belt 

 where they are usually surrounded by fogs during 

 the period of migration, so that, though visible for a 

 long distance when the weather is clear, this occurs 



