NESTING-HOUSES 71 



These figures suggest that all the birds pre- 

 ferred the stationary house, and that by suspend- 

 ing the houses the percentage of sparrows using 

 them was not decreased any more than the per- 

 centage of other birds. 



The author's personal experience and that of 

 others of whose observations he has been able 

 to obtain records indicate that the moving bird- 

 house is not a very successful device for outwit- 

 ting the sparrow; these experiences show, how- 

 ever, that our native birds will use such houses ; 

 and after careful consideration of all the evidence 

 at hand, the author believes that they may help 

 a little toward the desired end, as the sparrows 

 seem to prefer a stationary to a moving house. 

 But there is the probability, however, that the 

 sparrows, though a little cautious at first, would 

 soon become as accustomed to the latter as to 

 the former. 



Removing the Eggs. The author has con- 

 structed his houses so that the top could be easily 



