BLACK-THROATED GREEN WARBLER. 



667. Dendroica virens. 5 inches. 



Throat black ; two wing bars and outer tail feathers 

 white ; female with little black on the throat. 



A common bird in pine groves in northern United 

 States, or during migrations in birch woods. I have 

 found them most abundant on side hills covered with 

 low-growth pines. They seem to be very nervous and 

 are greatly excited if you appear near their nests. They 

 often have the habit of building several nests, whether 

 with the deliberate intent to deceive or whether because 

 the first was not satisfactory as to location is not known. 



Song. Entirely different from that of any other bird ; 

 a rather harsh ' 'zee' ' repeated six times, with the fourth 

 and fifth syllables lower. 



Nest. Of rootlets and fine grasses, lined with hair; 

 placed high up in pine trees ; eggs white with fine brown 

 specks around the large end (.60 x .50). 



Range. Eastern North America, breeding from 

 southern New England and Illinois north to Nova Scotia 

 and Hudson Bay ; winters in Central America. 



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