BIRDS OF THE CAMBRIDGE REGION. 339 



it was intersected by Appleton Street) on May 21, and he has given me a note 

 of another bird, also a male, which he saw in the trees near his house on Kirk- 

 land Street on May 25 and 26, 1890. I have but two records for our own place, 

 the first, of a male which I found in the garden on May 26, 1872, the other, of 

 a bird of the same sex which Mr. Walter Deane noted there on May 11, 12, 13 

 and 15, 1900. 



The southward flight of Bay-breasts sometimes begins as early as August 

 23 and usually lasts nearly through September. At this season the birds are 

 given to frequenting gray birches and dense, swampy maple woods and are nearly 

 always found in company with Black-poll Warblers. As the young of the two 

 species are closely similar in general appearance and behavior, it is often difficult 

 to distinguish them, especially when they are in the tops of tall trees. 



209. Dendroica striata (Forst.). 

 Black-poll Warbler. Black-poll. 



Abundant transient visitor in spring and autumn. 



seasonal occurrence. 



May 8, 1894, one seen, Arlington,' W. Faxon. 



May 12 — June 5. 

 June 6, 1892, Le-xington, VV. P. Hadley. 



September i, 1884, one female 1 taken, Watertown, W.Brewster. 

 September 4, 1899, one male seen, singing, Cambridge, W. Fa.xon. 



September 8 — October 20. 

 November 6, 1896, one im. seen, Cambridge, W. Brewster. 



A few Black-polls sometimes reach us by May 10, or even a day or two 

 earlier, but the spring migration does not often begin in earnest until after the 

 middle of the tnonth, and seldom attains its maximum proportions before the 

 25th. It invariably continues nearly or quite to the end of May, and occasion- 

 ally does not wholly end before the close of the first week of June. At the 

 height of the movement the birds are always common and often so very numer- 

 ous and widely distributed that they may be said to flood the entire Cambridge 

 Region. Indeed there are times when they occur abundantly almost every- 

 where — throughout upland woods (whether composed of evergreen or decidu- 



' No. 9509, collection of William Brewster. 



