THE STUDY OK BIRD LIFE 



Fig, D , the "Waldcn." 



Figs. A B, C, nd D.— For Starlings, Woodpeckers, and any kinds of forest 

 birds which build nests with the entrance at the side. It enlarged 

 with a sufficiently big entrance hole they will be utilised by owls. 



Figs. E and F. — For Wagtails, Kobinchats, Thrushes, Flycatchers, Doves, 

 and other birds which build open nests. 



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