248 Birds of Oregon and Washington 



about two inches from the top, and a shelf a 

 little below the entrance. Bird-boxes should be 

 deeper than they are wide, -in this case, the box 

 would be seven inches in perpendicular depth. 



For Swallows, the box should be 8x6x6 

 inches: location of hole and shelf near bottom; 

 size of hole, one and one-half inches. 



For Bluebirds, 10x6x6; entrance, nearer 

 the top; hole, ij inches in diameter; shelf, if 

 desired. 



For Martins, 10x8x8; entrance 2 inches, 

 and close to bottom, with or without shelf. 



Boxes in trees about the house are excellent, 

 and Woodpeckers, Chickadees, and Nuthatches 

 may be added to the domestic bird-circle. 



For the Chickadees the box should be 15 

 inches deep and 6x6; hole i| inches near the 

 top; no shelf. For Nuthatches the same box 

 will do with a hole i| inches. 



For the Woodpeckers, the box should be 

 from 15 to 20 inches in depth, and from 6 to 7 

 inches square at the base; entrance 3 to 3! 

 inches, and near the top; no shelf. 



The boxes for the Chickadees should be placed 

 from six to twelve feet from the ground; for the 



