WILSON'S WAEBLEE 101 



even in central and eastern Massachusetts, and not uncom- 

 monly in the highlands of western Massachusetts. It is 

 often abundant in the thickets of mountain maple on ill- 

 drained mountain summits. It is very inquisitive, and an 

 intruder may frequently hear its alarm-note, chick, or catch 

 a glimpse of the black " necklace " across its yellow breast 

 as it flies low in the bushes. Its song is a rather hurried out- 

 pouring of notes, introduced by the same chick which it uses 

 as an alarm-note. (See Magnolia Warbler, Kg. 18, p. 119.) 



Wilson's Waeblee. Wilsonia pusilla 

 5.00 



? . — Upper parts bright olive-greeu in a strong light ; crown 

 black ; forehead and under parts bright yellow. $ . — Black 

 crown generally wanting. 



Nest, on the ground in wet woods. -Eggs, white, speckled with 

 reddish-brown, and with lavender. 



The Wilson's Warbler is a rather uncommon migrant 

 through New England and New York, occurring in the latter 

 half of May and in September. It breeds 

 rarely in the extreme northern and 

 eastern portions of Maine. It is gen- 

 erally found in trees or bushes near 

 water, along the edges of swamps or in 

 the bushy borders of streams, though, 

 like most migrants, it may appear, when Fig. 9. Wilson's 

 more than usually common, in any ^^ " 



suitable cover. Its song suggests to most observers the 

 song of the Yellow Warbler ; it is briefer, less lively, and 

 ends in some rapidly delivered notes. It is a restless little 

 bird, difficult to observe. The yellow of the under parts 

 first attracts attention ; then a glimpse of its dark back dis- 

 tinguishes it from the female Yellow Warbler, but a sight 

 of the black crown bordered by the yellow forehead is 

 necessary for an absolute identification. 



