THE MIGRATIONS OF OTHER BIRDS 207 



through Central America and northern South Amer- 

 ica. Swainson's warbler retires in winter to the 

 Island of Jamaica, while Bachman's warbler is 

 known at that season only in Cuba. Kirtland's 

 warbler, which nests in a limited area in the state of 

 Michigan, goes southeast to concentrate in the 

 Bahamas. 



The Connecticut warbler is peculiar for the eccen- 

 tric migration route that it follows. This bird breeds 

 from the northern peninsula of Michigan to Mani- 

 toba in a decidedly limited area. In autumn mi- 

 gration it moves southeast or east, to cover the 

 area from Pennsylvania to New England, and then 

 follows south, east of the Appalachian Mountains, 

 through Florida and the West Indies to its winter 

 home in South America. On its return in spring it 

 passes again through Florida, but then continues to 

 the northwest, west of the mountains, through the 

 eastern portion of the Mississippi drainage, to its 

 nesting grounds. In the vicinity of Washington, it 

 is found in small numbers during the autumn in 

 dense growths of weeds or in thickets, but in spring 

 it is so rare that it has been seen on few occasions. 



The black-poll warbler is of peculiar interest for 

 the length of its migration route and for the com- 

 parative rapidity with which it travels. The species 

 nests mainly in Canada, from the northern border 

 of tree growth in Labrador to Alaska, and winters 



