13 



r— ->^- 



in diameter, and cannot enter boxes properly made for blue- 

 birds or smaller birds. It will use any tenement suitable for 

 martins, flickers, crested flycatchers or 

 sparrow hawks, such as are described and 

 figured hereafter. 



Crested Flycatcher. — Measurement of 

 box actually occupied, interior diameter, 

 6 by 6 by 8 inches. Long axis hori- 

 zontal. Entrance, 2 inches in diameter. 

 (See Plate IV.) 



M 



p 



© 



\ 



Flicker. — Interior di- 

 mensions about 22 by 

 about 6 by 4| inches. 

 Long axis vertical. En- 

 trance hole at least 2^ 

 inches in diameter, near 

 top. Several inches of 

 ground cork or coarse 

 sawdust and dry earth 

 mixed must be placed 

 in the bottom, as wood- 

 peckers make no nest 

 but rely on rotten wood 

 or chips which they 

 strike off the tree to 

 make a bed for their 

 eggs. (See Figs. 15 



and 16 and Plate V). 



Sparroiv Haivk. — Flicker boxes have been 

 used occasionally by sparrow hawks, but a 

 more roomy box, at least 8 inches in diam- 

 eter would be better. 



Screech Old. — Inside dimensions of box 



actually occupied on my place in which 



young were raised, 7 by 11 by 15 inches. 



Long axis vertical. Size of entrance hole, 3 



inches wide by 4 inches high. (Fig. 17.) 



Wood Duck. — Inside measurements, about 10 by 10 by 24 



inches. Entrance, 4 inches in diameter and 18 inches from the 



bottom. Long axis vertical. 



Fig. 16. — Flicker box and details. (After Biological 

 Survey). 



Fig. 17. —Owl box. 



