Cornell Study Clubs 



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what would be the number of the multitude of his feathered bene- 

 factors surrounding man? And what must be the vicissitudes of 

 bird life to cause the present constant diminishment of their numbers ! 



Birds of the dusk, other than owls 



1 Whippoorwills and nighthawks; appearance, habits. 



2 Their food and how obtained. 



3 What is known of their nesting habits; number of young. 



Fig. 67. — Family of young chipping sparrows 



4 Are these birds economically valuable to man? Are they in any way 



harmful ? 



5 Enemies: are the birds increasing or diminishing in numbers? 



Birds as planters 



1 Seeds most disseminated by birds and how scattered. 



2 Are birds sometimes responsible for the spread of new weeds or of 



noxious plants such as poison ivy? 



3 Are birds pests in grainfields and in meadows ? 



4 What is the explanation of the thickets of wild cherry, thorn apple, 



sassafras, bittersweet, and woodbine, which spring up along old 

 fences? 



