WESTERN BIRDS Warbler 



The flycatching habit of this group has given them 

 the name of Flycatching Warblers, and is helpful in 

 identification. One often sees one of these gay midgets 

 fly out from a tree and hover, Hummingbird fashion, 

 before some oak tassel, or other growth, inspect it, or 

 feed. They also fly out into the open and circle back, 

 but not to the same limb, as do the true Flycatchers. It 

 also has a way of twitching its tail irregularly up and 

 down. These habits will help to place the females and 

 young where they belong, even though the black cap is 

 restricted, or obscured. 



During migrations the birds are seen in deciduous 

 low growths along roadsides, in orchards, and in alder 

 thickets, rather than in the mountains and hills. 



The nest is a deep cup, rather well-built structure, 

 made of dried grasses lined with hairs and is placed on 

 the ground. 



Thayer gives two common call notes: one a very fine, 

 quick lisp, the other a low-toned and slightly harsh chut 

 much like the Yellow-throat's commonest call, but easily 

 distinguishable. The song, though low, is said to have 

 the ringing clarity of the Canada's and Hooded's songs, 

 the commonest form being a rapid, bubbling warble, of 

 two nearly equal parts, the second lower toned and 

 sometimes diminuendo, reminding Mr. Thayer of a 

 Northern Water-Thrush song. 



GENUS WILSONIA: PILEOLATED 

 WARBLER. 



Pileolated Warbler: Wilsonia pusilla pileoldta. 



FAMILY— WOOD WARBLERS. 



The Pileolated Warbler is a subspecies of the Wil- 

 son's and differs from it chiefly in being slightly larger 



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