The Birds' Calendar 



its nest being commonly lined with horsehair it 

 gets the name of " hair-bird." 



Almost a fac-simile, enlarged, of the chipping 

 sparrow, with a bright chestnut crown, and aptly 

 called the "arctic chipper," from its breed- 

 ing only in arctic regions, is a bird more com- 

 monly known as the tree sparrow, but with lit- 

 tle propriety in the prefix, as it is oftener found 

 on the ground than elsewhere, and does not 

 commonly nest in trees. It is a denizen of our 

 woods in winter, although I have seen it in the 

 Ramble only during migration. It was then 

 almost silent, but in its summer haunts it is said 

 to be a very pleasing singer. In the case of 

 species so nearly identical as the common and 

 the Arctic chippers, it would be very interest- 

 ing to know wherein consists that subtle tem- 

 peramental distinction that drives them to such 

 diverse latitudes. 



* 



One of the largest and most important groups 

 of birds in this country is the one known as the 

 "warblers." Especially graceful in form and 

 motion, with brilliant plumage, pleasing if not 

 remarkable songsters, and in their habits thor- 

 oughly beneficial to vegetation, the warblers 

 deservedly rank high in the estimation of bird- 

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