SEASONAL FLIGHT OF DUCKS 193 



on Great Salt Lake. That sixteen of these banded 

 birds were recaptured during subsequent autumn 

 migrations at the point where they were originally- 

 marked indicates that western Denmark is on a 

 regular fly line for this species. 



The European green-winged teal, in appearance 

 a close counterpart of our species, has been found 

 in recent years to be the breeding species of the 

 Aleutian Islands, but does not range to the main- 

 land of Alaska. Though common in the Aleutians, 

 in autumn migration it evidently crosses to the 

 coast of Asia, as there are no certain records for it 

 in the states of our western coast. This bird, in 

 western Europe, migrates south from the Scandi- 

 navian peninsula, to winter in Ireland, the south of 

 England, and France, as shown by birds banded in 

 Denmark, and at two points in England. A few pass 

 as far as southern Spain and Italy. 



The mallard in western Europe has somewhat 

 different habits from the two ducks just enumerated, 

 since it is strictly migratory only in the far north. 

 Large numbers of birds bred in England and Ger- 

 many either proved to be strictly sedentary or 

 moved only from fifty to one hundred miles during 

 winter. The migration of this species in western 

 Europe is later in autumn and earlier in spring than 

 in North America. It may be noted that there is a 

 very large form of wild mallard {Anas platyrhynchos 

 conboschas) which remains in Greenland. 



