\v.\r]',i,1';k sonc.s. :ji^ 



or ill the dense iindergrovvtli of woods, where he conceals 

 himself when singiii";^. 



Eastern North America, l^reeding as far north as the 

 Yukon and Mackenzie River districts. Rare east of the Alle- 

 ghanies, north of Virginia. 



In the western XTnited States, from tlie Rocky Mountains 

 to the Pacific, the species is represented bv the 



Liutescent Warbler. Hclminthop/iila celata 

 Ititescciis. (')4()a. 



And on vSan Clem^iite. vSaiita Cruz, and Santa Rosa I.slands, 

 Cahfornia, by the 



Dusky Warbler. Hclmi)itliophila celata sordicia. ()4()b. 



Wilson's Warbler. IVilsonia pusilla. (vs."). 



There is a variability in this Warbler's .song which lies 

 wholly within the group. Mi.ss Roberts has summed it up in 

 the following sentence: "It is sometimes like the ordinary 

 song of Yellow, .sometimes more like Redstart, sometimes al- 

 mo.st unaccented. ' ' But it is always shriller than either, besides 

 showing a tendency to marked z .sounds. Mr. Nuttall describes 

 it by the S3dlables ts tsli tsliea^ which strongly suggest a short 

 song of Yellow Warbler. It is a small .song, both in volume 

 and quantity. 



This black - capped Warbler sings during his northward 

 journe}-, and I have heard weak songs on its return in 

 autumn. 



Brush}' underwood is its favorite haunt, occasionally 

 going higher up in the trees. It .seems partial to places near 

 water. 



Eastern North America, west to and including the Rocky 

 Mountains, north to Labrador, Hudson Bay Territory and 

 Ala.ska. Breeds north of the United States chiefly. 



P'rom the Great Basin to the Pacific and north to Alaska 

 the form is 



Pileolated Warbler. Wilsonia pusilla pilcolata. (is.ia. 



Nashville Warbler. Hclminthophila ruhricapilla . (U"). 



There is considerable variation in execution of the .sons:, 



