426 ZOOLOGY. 



Which are more vocal, the males or the females ? What explanations are 

 offered for this? 



8. What is the history of the English sparrow in this country? What 

 are its habits ? How do you account for its rapid spread ? 



9. Make a special study of the local distribution of the species of birds 

 known to occur in your vicinity. Which prefer the meadows? The 

 marshes ? The streams ? The woodlands ? Do the different species nest 

 in the same regions in which they feed? 



10. The relation of selected species of birds to man. Are they helpful 

 or harmful to his interests? Has he been helpful or harmful to them? 



