AMERICAN WARBLEKS. 121 



roots of fallen trees. Mr. Brewster, in his account of the 

 birds of Winchenton, says that all of the nests that he has 

 seen ( a dozen or more ), were built either on the side of a 

 mound, or, as in one case at Lake Umbagog, on the side of a 

 cliff, the situation chosen being higher than his head ; and 

 that the nests were more or less spherical in form, with the 

 opening on the side. The eggs are deposited early in June. 



SoxG. The song of the Canadian Warbler consists of 

 from two or three to eight notes. These are uttered as a 

 rather disconnected warble, and has a little of the quality of 

 the call song of the Maryland Yellow-throat. It is not, how- 

 ever, as regular as the song of the Maryland, but is varied in 

 its utterance. It is rather low, and while it can scarcely be con- 

 sidered a very musical performance, has a charm all its own. 



Migration and Breeding Range. The Canadian War- 

 bler is a late spring migrant. I did not find them at Wil- 

 iiamsport, Pennsylvania, in 1876, until May 12, and they are 

 rarely found in New England anywhere until the second week 

 in this month. They linger in eastern Massachusetts until 

 the first of June. This warbler has quite a singular breeding 

 range^ being found along the mountain ranges from South 

 Carolina northward, and in different places throughout New 

 England ; locally in the three southern states, but are general- 

 ly distributed in the three northern. Thus they are known to 

 nest quite regularly in the towns about Boston, as in Brook- 

 line, Dedham, Milton, Bedford, Belmont, and Concord. Also 

 in Worcester and Berkshire Counties. In my Birds of East- 

 ern North America, second editon, page 621, I have suggested 

 that such a singular distribution may be explained by suppos- 

 ing that this species, in common with such birds as the Hermit 

 Thrush and Solitary Vireo, which are similarly scattered in 

 in summer, were more universely distributed in the past when 

 the forests were more continuous; then nesting over much of 

 the intermediate region which they now avoid on account of 



