NESTING-BOXES 227 



*Sparrow, English (Passer domesticus). 

 Starling (Sturnus v-ulgaris). 

 *Swallows : 



Tree (Iridoprocne bicolor). 



Violet-green (Tachycineta thalassina lepida). 

 Titmouse, tufted (Boeolophus bicolor). 

 Warbler, prothonotary (Protonotaria citrea). 

 Woodpeckers : 



Downy (Dryobates pubescens medianus). 



Hairy (Dryobates rillosus wittonu). 



Red-headed (Melanerpes erythrocephalus). 

 * Wrens : 



House (Troglodytes a'edon a'edon). 



Parkman's (Troglodytes a'edon parkmani). 



Bewick's (Thryomanes bewicki). 



Texas (Thryomanes bewicki cryptus). 



Vigors's (Thryomanes bewicki spilurus). 



The following have been reported as using the 

 nesting-boxes of the open type; cardinal, catbird, 

 purple finch, grackle, mockingbird, orchard oriole, 

 phoebe, robin, song sparrow, and brown thrasher. 



Types of houses. The great variety of houses now 

 being made may conveniently be classified into three 

 groups, based on the attempt to imitate the natural 

 nesting-sites of birds. In the first group are those 

 houses made in imitation of a woodpecker's nesting- 

 site, both inside and outside; in the second group 

 are those which imitate the natural nesting-sites on 

 the outside only; and in the third group are those 

 which make no attempt to imitate the natural nest- 

 ing-sites either inside or outside. 



Imitation both outside and inside. The best- 



