1920 J Eifrig, Haunts of Cairns' Warbler. 553 



males, although the difference is so slight, that the bird must be 

 had in the hand to appreciate it. Here, in the mossy, fern-covered 

 banks under the rhododendron, as well as in its almost impenetrable 

 thickets the nests are located, and here the song, a rapid, explosive, 

 ascending dill dill dree, may be heard on all sides. This song is 

 indistinguishable from that of D. c. caeridescens. 



In the same places, but staying higher up in the tall hemlocks 

 above the rhododendrons, the Black-throated Green Warbler 

 holds forth, here as during migration, a companion of the Black- 

 throated Blue. But since subspecies must be made, here it seems 

 is where a new one should be introduced. Since my first visits 

 to this region about 1900, I was struck by the dingy appearance 

 and small size of most of the males, though some were of normal, 

 intense coloration. At first, I ascribed it to wear and moult, 

 but in June warblers are at their best in appearance, and further- 

 more, the olive on the back seems darker, while the song is weaker. 

 So here are differences that can be perceived when the bird is in 

 bush or tree. 



In the same habitat is found the Magnolia Warbler, only in 

 smaller numbers. Its song here as in Canada, sounds to one like 

 weetsi weetsi weetsi, accent on the next to last syllable, whereas 

 D. virens seems to say dee dec dee ah di, accent on the antepenult. 



Even less abundantly than the Magnolia is found the Black- 

 burnian Warbler (J), fusca), in the same habitat. It is especially 

 partial to the tops of hemlocks. On the 15th of June, we saw a 

 male gathering nesting material on the edge of the much traveled 

 state road, at Bear Creek Hollow. We watched it and saw that 

 he took it into a hemlock, about 35 feet up, ten feet out on a large, 

 horizontal limb, where with the glasses we could make out the form 

 of a tiny nest. A week later we got it down with much labor, 

 only to find it empty. It is built of the thinnest dry twigs of 

 hemlock, a little bast and fiber, and lined with horse hair; its 

 diameter is three and a half inches over all, the cup one and three 

 quarter by one and a half inches deep. The song cf the Black- 

 burnian is low and remarkable for its nasal and ventriloquial 

 quality. One sang a monotonous tsi tsetse tsnnn, another dell dell 

 dell tsit tsit tsitnn, sometimes tender then again strangely muffled. 



A distinct surprise among the warblers was furnished by the 

 Canada Warbler. Since my last visit four years previously it 



