1902] Kells Nesting of some Canadian Warblers. 181 



crevice and hole looking" lor their prey. As this species is not 

 mentioned by any European naturalist, it must be foreig"n to that 

 continent." 



The Black-throated Blue Warbler {Dendroica ccsrulescens). 



The favorite habitat of this species is high hardwood timbered 

 woods, where there is a thick growth of underbrush ; and while 

 the male warbles his melody high among the branches, where 

 also he loves to glean his insect food amid the green foliage, the 

 female usually ^elects a lowland situation for the cradle of her 

 progeny; and in common with other small birds that nest in simi- 

 lar positions she is often compelled to become the foster pa;ent of 

 one or more of the young of that feathered parasite, the cow-bird. 



For some years previous to the summer of 1886, I had sus- 

 pected that this species nested in different tracts of hardwood 

 foiest situated to the northwest of Listowel ; and this idea rested 

 on the fact that the song-notes of the male bird were often heard 

 and frequently repeated in animating strains at a period when I 

 thought the female should be nesting ; but from the elevation at 

 which this melody was emitted, I supposed that the nesting site 

 of the female would also be at a high elevation from the ground, 

 and I therefore had no expectation of discovering its nest among 

 the low brushwood, in any of my wildwood rambles. However, 

 on the afternoon of June 5th, 1886, when out in a tract of low, 

 thick underwood, about a mile to the west of Wildwood, I found 

 a nest with one &%^., which at first I took to be one of a chestnut- 

 sided warbler, so much did it resemble the nest of that species in 

 form, size, materials of composition, and situation. The egg 

 also had a much similar appearance ; but the different notes of 

 the female owner of this ne.ct soon attracted my attention, and I 

 waited a short time till she came out of the thick foliage where 

 she was concealed and approached the more open space where I 

 was standing. Then I saw that she was quite a different species, 

 and a more close examination of the nest showed that it was a 

 more compactly formed structure than is usually made by the 

 chestnut-sided bird, though the eggs of both species are much 

 similar. The scolding notes of this bird soon brought her mate 

 upon the scene, but he seemed more disposed to sport with her 



