6o 



Bird - Lore 



Of the hole-nesting birds, a comparatively small proportion have yet learned 

 to accept the artificial nesting-site, only nine species taking them regularly 

 and nineteen more utilizing them occasionally. It is to be expected, however, 

 that eventually all the species will learn to adapt themselves, and, perhaps, 

 even others will so modify their present nesting habits 'as to accept the artificial 

 structures. This proved to be the case in the celebrated experiments of von 

 Berlepsch, in Germany, where out of i,ooo nesting-boxes placed on his estate, 

 birds gradually were induced to occupy over 900. 



The species which regularly use nesting-boxes are as follows: House Wren 

 (and all its subspecies), Bluebird (eastern and western), Chickadee (northern 

 and southern subspecies). Purple Martin, Tree Swallow, Fhcker, Violet-green 

 Swallow, House Finch, Bewick's Wren, House Sparrow, and Starling. 



The species which occasionally use nesting-boxes are as follows: White- 

 breasted and Red-breasted Nuthatches, Downy, Hairy, and Red-headed Wood- 

 peckers, Tufted Titmouse, Carohna Wren, Crested Flycatcher, Screech, Saw- 

 whet, and Barn Owls, Sparrow Hawk, Wood Duck, Song Sparrow (rarely), 

 and Dipper. The species using covered shelves or shelters, open at the sides, 

 are Robin, Phoebe, and Barn Swallow. 







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