80 SUBJECTIVE LESSONS. 



stmte liis theory ? Mention one of the best arguments for 

 the value of protective coloration. Give illustrations. 

 What birds illustrate the value of deceptive coloring- ? 

 What are recognition or signalling colors ? Give illustra- 

 tions. 



Color and Sex (Chapter III, pages 45-47).— The pupil 

 should learn the Synopsis of Secondary Sexual Charac- 

 ters, and give one or more illustrations of each kind of 

 sexual difference mentioned. Explain and illustrate Dar- 

 win's theory of sexual selection. How does the theory of 

 Wallace differ from that of Darwin ? 



The Migration of Birds. 



Extent of Migration (Chapter lY, page 49).— Upon 

 what is the extent of migration often dependent ? Explain 

 this. Where do most migratory western species winter ? 

 Where do our eastern migratory Sparrows and berry 

 eaters winter ? Where do the majority of our eastern in- 

 sectivorous .species winter ? What route do they follow ? 

 How far south do some Plover and Snipe winter ? 



Times of Migration (Chapter IV, pages 49-53). — This 

 branch of the study of bird migration is covered much 

 more fully under the section devoted to seasonal lessons, 

 where the method of treatment is suggested. The matter 

 here given should be used in connection with the added 

 material in the section named. 



Manner of Migration (Chapter IV, pages 54-57). — What 

 is the first step in the fall migration ? Do old or young- 

 birds lead the way ? What birds fly by night ? Why ? 

 Give examples. What birds migrate chiefly by day ? 

 Why ? Give examples. What birds migrate exclusiv^ely 

 by day? Why? Give examples. What constitute high- 

 ways of migration ? At what height ma}^ migrating birds 

 travel ? Of what advantage is this heigiit to them ? When 

 are birds attracted to lighthouses ? How may one observe 

 the night migration of birds ? How many birds were thus 

 observed at Tenaflj^, N. J. ? Describe the observations 

 made from the Bartholdi Statue. 



