Wild Birds and Other Insect-eating Animals 187 



attract martins and sparrows. A simple house may be 

 made with old tin cans, as shown in Fig. 121, using a 

 board for a roof, and allowing part of the top of the can 



Fig. 121. A good way to use tin cans. 



to remain, to make a lighting place. A good house for 

 martins is shown in Fig. 122. 



257. Other Animals that Destroy Insects. " Horned 

 frogs" (though they are really horned lizards) and 

 common toads live on insects, as, also, do most snakes. 

 Even the old chicken snakes make way with many times 

 more rats and mice than they do with young chickens. 



Fig. 122. A simple martin house. 



