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NEW YORK STATE MUSEUM 



Gerald Thayer describes the song as possessing " a certain quality 

 of huskiness like the Black- throated blue's, but much less obtrusively 

 noticeable and rather enhancing than marring the quiet sweetness of the 

 song. One of the two main utterances is remarkable for its deliberate 

 and highly modulated enunciation; the other, not. The deliberate 

 song of 5 (sometimes 6 or 8) notes is the one usually described in books, 



but here about Monadnock the 

 other is at least as often uttered 

 and in midsummer is the com- 

 monest of the two. The differ- 

 ences between them are suggested, 

 though feebly, by the two phrases 

 'sweer, sweer-r-r, swi-ni swee' (the 

 first and the last accented notes 

 the highest pitched), and 'iiri-wi- 

 wi-wi-wi-wi-wi, wer-we-e-e,' the last 

 note highest pitched as well as 

 most emphatic. Two, at least, 

 of this warbler's call notes are 

 fairly characteristic, a plainly den- 

 droicine but rather loud and full- 

 toned ' tsip ' and a reduplicated 

 smaller ' chip ' often running into 

 chippering like that of many young 

 but few other adult warblers." 

 The nest is usually placed in a hemlock tree. Burtch and Stone note 

 25 nests all placed in hemlocks with one or two exceptions and they were 

 placed near the branches of a hemlock. They are usually from 15 to 40 

 feet from the ground, near the thicker portion of the limb some distance 

 from the trunk. The nest is rather compactly built and deeply cupped, 

 made of fine twiglets of hemlock lined with tendrils, rootlets and hair, 

 sometimes a few feathers and dead grasses and fine strips of inner bark, 



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Black-throated Green warbler's nest and eggs 



