PASSERINE BIRDS OF NEW YORK 263 



like dress but is lacking in intensity of the colors. The adult 

 winter plumage resembles the first winter, but is brighter and 

 with a trace of the chestnut stripes like the male first winter 

 dress. In adult nuptial plumages, the black on the sides of head 

 and throat is regularly duller and the chestnut striping less heavy 

 than in" the male. 



Dendroica castanea (Wils.). BAY-BREASTED WARBLER 



1. NATAL DOWN. No specimen seen. 



2. JUVENAL PLUMAGE acquired by a complete postnatal moult. 



Above, including wings, tail and wing coverts, clove-brown, edged with pale bistre ; 

 two wing bands dull white. Below, white, thickly spotted with dull black. 

 Bill and feet pinkish buff becoming dusky. 



3. FIRST WINTER PLUMAGE acquired by a partial postju venal 

 moult, in July and August in eastern Canada, which involves the 

 body plumage and wing coverts but not the rest of the wings nor 

 the tail. 



Similar to previous plumage but unspotted. Above, yellowish olive-green with dusky 

 streaks on the crown, a few concealed black spots on the back, the upper tail co- 

 verts cinereous gray. Wing coverts edged with olive-green and two broad wing 

 bands white tinged with yellow. Below, cream-color washed with straw-yel- 

 low on the throat and with a very little chestnut on the flanks. 



Resembles D. striata but a yellower olive above, a buffier yellow below and a wash 

 of chestnut on the flanks, with less definite streaking above and none below. 



4. FIRST NUPTIAL PLUMAGE acquired by a partial prenuptial 

 moult which involves most of the body plumage and wing cov- 

 erts but not the rest of the wings nor the tail. The deep chest- 

 nut crown, paler throat and lateral stripes, black sides of 

 the head and forehead, olive-gray back streaked with black, the 

 rich buff patches on the sides of the neck and the black wing 

 coverts, plumbeous-edged and white-tipped, are all assumed. 

 Young and old become practically indistinguishable, adults usu- 

 ally with darker wings and tail noticeable in the primary coverts. 



5. ADULT WINTER PLUMAGE acquired by a complete post- 

 nuptial moult in July. Similar to first winter dress, but the 

 crown, nape and back distinctly streaked with black, creamier 

 tints below and the flanks striped distinctly with chestnut, the 



