NESTING-HOUSES 15 



Starling (Sturnus vulgaris). 

 Swallows : 



*Tree (Iridoprocne Hcolor). 



*Violet-green ( Tachycineta thalassina lepida). 

 Titmouse, Tufted (Bwolophus bicolor). 

 Woodpecker, Red-headed (Melanerpes erythrocephalus~). 

 Wrens : 



*House (Troglodytes aedon). 



*Parkman's (Troglodytes aedon parkmanii). 

 Bewick's (Thryomanes bewickii). 



*Vigors's (Thryomanes bewickii spilurus'). 

 Texas Bewick's (Thryomanes bewickii cryptus). 



The following nest in hollow trees and so 

 might possibly be induced to occupy nesting- 

 houses : 



The woodpeckers, nuthatches, Carolina wren, 

 barn owl, barred owl, and saw-whet owl. 



There are other birds which may be attracted 

 around buildings by putting up shelves or open 

 boxes, or leaving openings in the barns ; such as 

 the phoebe, robin, barn swallow, eave swallow, 

 chimney swift, and Say's phoebe. 



In building a bird-house one must take into 

 account the species for which the house is in- 

 tended ; but the author will first take up the 

 discussion of a few general considerations before 

 treating the question of special adaptations for 

 each bird. 



Hollow Limbs. We may evidently hope to 

 be most successful with that kind of house which 



