BIRDS 



29 



enemies of the different 

 species are present ? Much 

 of this side of the prob- 

 lem will be worked out 

 naturally in connection 

 with nesting habits, the 

 study of nest building, 

 and the fate of the differ- 

 ent nests in the spring. 



Pay particular attention 

 to the bird-food plants of 

 the area with reference to 

 abundance of food at dif- 

 ferent seasons. Note the 

 condition in this respect 

 for the different months. 

 Is the area stripped of 

 available food by the time 

 robins and bluebirds have 

 migrated in the fall? May 

 this help to explain bird 

 migrations ? 



Note in detail what pro- 

 visions have been made in 

 your district to supply the 

 necessaries of bird life, 

 bird houses, drinking and 

 bathing fountains, plant- 

 ing of food trees. What 

 is done to protect the birds 

 from enemies ? What in- 



Fu;. 11. Bird fountain. Natural rocks laid 



rluence have these urovi- in cement with deep chinks filled with soil 



9 P IOV1 and planted with mosses, ferns, and wild 



sions exerted on the bird flowers 



population as compared Photograph i.y the author 



