I90 THE MIGRATIONS OF BIRDS 



tain extent. A blue-winged teal banded in Septem- 

 ber by Osier at Lake Scugog, Ontario, was killed the 

 following December near Port of Spain, Trinidad. 

 The species passes regularly south to the West 

 Indies and to northern South xAmerica, and has been 

 recorded in Brazil and Chile. Large numbers of 

 northern ducks travel in winter to suitable points 

 on the Mexican tableland, so that near the City of 

 Mexico they are baited to small lakes and killed in 

 hundreds by armadas — batteries made of a hun- 

 dred or more gun barrels so arranged that they may 

 be fired simultaneously. Pintails and scaup ducks 

 travel into the West Indies, and with casual ducks 

 of other species range down the eastern coast of 

 Central America as far as Panama. The extent of 

 this migratory flight is not, however, definitely 

 known. 



Ducks are capable of flying long distances over 

 oceans also, as shovellers and pintails are regularly 

 migrant in the Hawaiian Islands, and go south at 

 least to the Line Islands near the Equator. They 

 have also been recorded in the Marshall and Gilbert 

 Islands. 



Northward flights in spring do not necessarily 

 follow the same lines pursued in autumn, since, as 

 has been said, pintails banded in the Salt Lake 

 Valley have been taken in spring in Saskatchewan. 

 It is assumed that they migrated in autumn, to 



