294 BIRDS OF NORTH CAROLINA 



Brewster informs us that the three above-mentioned specimens are all that he 

 has obtained from western North Carolina, and that he is still inclined to refer 

 them to this form, in case recognition were given it by the American Ornithologist's 

 Union; and furthermore states that there is only a tendency in the Yellow-throated 

 Warblers from the Mississippi Valley to have whiter lores, shorter bills, and other 

 marks regarded as characteristic of this variety. 



297. Dendroica virens (Gmel.). BLACK-THROATED GREEN WARBLER. 



Description. Clear yellowish olive; sides of head yellow; whole throat and breast black; rest 

 of underparts white; females and fall birds with the black interrupted or veiled by yellowish. 

 Extreme measurements of 33 specimens from Raleigh and Weaverville: L., 4.853.24; W., 2.32 

 2.65; T., 1.85-2.12. 



Range. Eastern North America, breeding from northern United States northward, and south 

 along the mountain ranges. Winters in Mexico and Central America. 



Range in North Carolina. Whole State, breeding in the mountains and also near the coast; 

 transient in the central portion of the State. 



FIG. 237. BLACK-THROATED GKEEN WAEBLEE. 



In spring the Black-throated Green Warbler arrives in central North Carolina 

 the last of March, and has been seen in the neighborhood of Raleigh until May 22. 

 In the mountains it appears about April 15 and has been known to remain until 

 October 31, which is about two weeks later than the latest date of its known occur- 

 rence at Raleigh. 



Bruner and Sherman have found it to be common at Blowing Rock in June and 

 later, and the former also reports it breeding in June, 1909, a little west of Taylors- 

 ville. Sherman found it at Hendersonville in the summer of 1907, and he and 

 C. S. Brimley saw and heard it commonly between Toxaway and Highlands on 

 May 8, 1908, in growths of hemlock near the roadside. Rhoads recorded it breed- 

 ing on Roan Mountain in 1895, and Sherman found it common at Linville in late 

 June, 1909. These localities show that it is pretty well distributed through the 

 mountains in the breeding season, and is not confined by any means to the higher 

 elevations, as the Taylorsville and Hendersonville records attest. 



The nests are placed in the forks of horizontal limbs of coniferous trees. These 

 are compact, well woven structures, made of thin strips of bark, twigs, dry grass, 

 wool and feathers, lined with hair and vegetable down. The eggs are usually four, 

 white or buffy, speckled and spotted with brown and gray in indistinct wreaths 

 about the larger end. Size .65 x .50. 



