AVES 



199 



spend a few weeks or months each year. The passage of this law was 

 one of the greatest advances of the age in bird protection. Before its 



(From Dearborn, [Bird 



PIG. 123. FIG. 124. 



PIG. 123. Bird house made from hollow log. X%. 

 Houses and How to Build Them.) 



FIG. 124. Gourd for wrens or bluebirds. X^- (From Dearborn, Bird'jHouses} 

 and How to Build Them. 



passage a reed bird, for example, might have been protected in Vir- 

 ginia, but as soon as it crossed the North Carolina boundary it could be 

 slaughtered in any numbers. 



By a treaty with Canada, effective July 31, 

 1918, migratory birds are given not nly national, 

 but international protection. The various regu- 

 lations of this treaty define the means by which 

 migratory game birds may be taken, the open 

 season for certain birds, bag limits, etc. 



The killing at any time in the United States 

 of the following birds is forbidden by law : band- 

 tailed pigeon, common ground doves and scaled 

 doves, little brown crane, sandhill crane, whoop- 

 ing crane, wood duck, swans, curlews, willet, up- 

 land plover, all shore birds (except black-bellied 

 and golden plovers, Wilson snipe or jacksnipe, 

 woodcock, and the greater and lesser yellow- 

 legs), bobolinks, catbirds, chicadees, cukoos, flickers, flycatchers, 



FIG. 125. Tomato 

 can, with one end re- 

 moved, fastened to top 

 of post. Hole cut in 

 side for entrance. Suit- 

 able for bluebirds or 

 wrens if put in shady 

 place. (From Dearborn, 

 Bird Houses and How 

 to Build Them.) 



