42 NESTING BOXES, ETC. 



(1) that a small perch should be placed out- 

 side the entrance hole on which the parent 

 birds may alight when going to and from 

 the nest; and 



(2) that the whole of the exterior of the 

 box be covered with rough oak bark, 

 virgin cork, moss, or other material, so as 

 to assimilate the box as nearly as possible 

 to its surroundings. 



Fig. 5. Fig. 6. 



Fig. 5.— Size of Entrance Hole for Blue Tit 

 Fig. 6.— Size of Entrance Hole for Great Tit or Nuthatch. 



The two sizes of the entrance holes recommended 

 by Mr. Tuck as most suitable for the various species 

 which have hitherto been induced to nest in this 

 form of box are shown in Figs. 5 and 6. 



Mr. Tuck informs me that the species of birds 

 which have been attracted by, and have nested in, 

 this form of box are the Great Tit, Blue Tit, Cole 



