148 BIBD8 OF ILLINOIS. 



"Sp. CHAR. Male. Crown, nape, and upper half of the head black; the lower half, 

 including the ear-coverts, white, the separating line passing through the middle of the 

 eye. Best of upper parts grayish ash, tinged with brown, and conspicuously streaked 

 with black. Wing and tail-feathers brown, edged externally (except the inner tail- 

 feathers) with dull olive-green. Two conspicuous bars of white on the wing-coverts, 

 the tertials edged with the same. Under parts white, with a narrow line on each side of 

 the throat from the chic to the sides of the neck, where it runs into a close patch of black 

 streaks continuing along the breast and sides to the root of the talL Outer two tail- 

 feathers with an oblique patch on the inner web near the end; the others edged inter- 

 nally white. Female similar, except that the upper parts are olivaceous, and, even on the 

 crown, streaked with black ; the white on the sides and across the breast tinged with 

 yellowish; a ring of the same round the eye cut by a dusky line through it. Length of 

 male, 5.75; wing, 3.00; tail, 2.25." (Hist. N. Am. .) 



The autumnal dress is very different from that of spring. The 

 upper parts are light olive-green, indistinctly streaked with dusky; 

 beneath greenish yellow, obsoletely streaked on the breast and 

 sides; the under tail- coverts, only, pure white, a yellowish ring 

 round the eye, and a superciliary one of the same color. In this 

 dress it is very easily confounded with the autumnal D. castanea. 

 The differences, as far as tangible, will be found detailed under the 

 head of the latter species. 



"The young bird in its first dress is also quite different, again, 

 from the autumnal-plumaged birds. The upper parts are hoary- 

 grayish, the lower white; each feather of the whole body, except 

 lower tail-coverts, with a terminal bar or transverse spot of black- 

 ish, those on the upper parts approaching the base of the feathers 

 along the shaft. Wings and tail much as in the autumnal plu- 

 mage." (Hist. N. Am. B.) 



Except the Yellow-crowned Warbler, (D. coronata) and the Summer 

 Yellowbird (D. (estiva), the Black-poll Warbler goes further north 

 than any other species of the genus, its breeding range extending 

 from the desolate plains of northern Labrador to the shores of the 

 Arctic Ocean and coast of Norton Sound. It is usually an abundant 

 species in the Atlantic States during its migrations, and in spring 

 is the latest of the migrants. 



Dendroica blackburnise (Gmel.) 



BLACZBUKNIAN WAEBLEB, 



Popular synonyms. Orange-throated Warbler; Hemlock Warbler. 

 Motacilla blackburnice GMEL. 8. N. i, 1788, 977. 



Sylvia blackburnice LATH WILS. Am. Orn. 111.1811, 64. pi. 23, fig. 3. NUTT. Man. 11, 

 1831,379. ADD. Orn. Biog. ii, 1834, 208; v,1839.73,pl. 135.399. 



Sylvicola blackburniae JABD. AUD. Synop. 1839. 37; B. Am. ii. 1841. 48, pL 87. 



