SEASONAL FLIGHT OF DUCKS 189 



mentioned returns from black ducks banded by 

 H. S. Osier at Lake Scugog in south central Ontario. 

 These returns divide into two more or less distinct 

 groups, one from points to the southward in the 

 drainage of the Mississippi Basin, and the second 

 from New Jersey, Delaware, Maryland, Virginia, 

 North and South Carolina — pointing clearly to a 

 migration line directly to the southeast, which ap- 

 parently may reach the heads of Delaware and 

 Chesapeake bays and from there spread southward. 

 A few returns from mallards indicate apparently 

 similar lines of flight. It is interesting to compare 

 these results with those obtained by Lincoln in a 

 large number of mallards banded near Browning, on 

 the Illinois River, in west central Illinois. Returns 

 from these have centred near the Mississippi River, 

 with extension to the Gulf coast of Texas, and 

 straggling records from Georgia and Florida. From 

 Browning it appears that the main flight is south, 

 with only a few birds passing to the southeast. 

 Black ducks and mallards banded by J. Pulitzer in 

 Hancock County, Maine, and F. Thompson at Bar 

 Harbor, Maine, have been killed in the coastal 

 region to the south, none as yet having been secured 

 from the interior. The flight here thus seems to fol- 

 low the trend of the coast to the south. 



Migration of North American ducks southward 

 beyond the limits of the United States is of uncer- 



