No. 4.1 BIRD HOUSES AND NESTING BOXES. 



203 



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Tree Sioallow. — Interior dimensions, 4| by 4| by 8 inches. 

 Entrance hole about, not over. If inches. Long axis vertical. 

 Bluebirds also use this box. (See Plate L, Fig. 2.) 



This is the most popular box (with the birds) that I have 

 seen. 



Starling. — This European bird will soon be common and 

 may become a pest. It requires an entrance hole about If inches 

 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 diame- 

 ter, 6 by 6 by 8 inches. Long axis 

 horizontal. Entrance, 2 inches in di- 

 ameter. (See Plate IV.) Mr. Henry 

 W. Stillings of Berea, Kentucky, gives 

 the following dimensions of two boxes 

 in which this bird 

 has nested there : 

 No. 1, 8h inches long, 

 6f inches wide, 6 

 inches high; entrance 

 diameter, 2 inches; 

 entrance, 4 inches 

 above floor. No. 2, 10 

 inches long, 4| inches 

 wide, 4 inches high; 

 entrance diameter, 2| 

 inches; entrance, 1| 

 inches above floor. 

 This bird has nested 

 in small bird houses 

 and also in hollow log 

 nesting boxes with the 

 long axis vertical. 



Flicker. — Interior dimensions about 22 by about 6 by 4f 

 inches. Long axis vertical. Entrance hole at least 2f inches in 

 diameter, near top. Several inches of ground cork or coarse 



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Fig. 16. — Flicker box and details. 

 Survey.) 



(After Biological 



