BIRDS AND INSECTS. 309 



RUFFED GROUSE "PARTRIDGE" OR PHEASANT. 

 10% insects. 

 90% wild fruits, berries, nuts, weed seeds. 



UPLAND PLOVER. 



97% animal matter, chiefly injurious and neutral forms. 

 3% weed seed pests chiefly. 



KlLLDEER. 



3% vegetable matter chiefly noxious weed seeds. 

 97% insect pests. 



HORNED GREBE. 



72.2% insect pests. 

 27.8% fish. 



FRANKLIN'S GULL. 



94.40% animal matter mostly grasshopper. 

 5.54% vegetable matter. 



PROBLEMS. 



1. If insects caused a loss of $1,000,000,000 to the crops in 1912. 

 what per cent was that loss of the total crop of the same year? 

 (See Year Book Dept. of Ag.) 



2. It has been estimated that the average cat in Massachusetts will 

 kill 10 useful birds per year ; if Ohio's rural cat census is 

 276,719 cats, at that rate what would be the number of birds 



sacrificed annually in Ohio? 



3. It has been estimated that a bluebird will destroy on an average 

 30 insects a day; how many insects would 100 bluebirds destroy 

 in 8 months? 



4. It has been stated in a U. S. Government report that the estimated 

 consumption of weed seeds by the combined members of the 

 sparrow family results in a saving of 1 per cent of the total crop 

 production of the United States. What was the amount of money 

 saved to the farmers based on the value of farm products in the 

 U. S. in 1912? 



5. It is estimated by the government that tree sparrows annually eat 

 approximately 875 tons of weed seeds in the state of Iowa. What 

 was the number of pounds of weed seeds consumed per acre in 

 that state? 



6. The University of California estimates that there is 1 meadowlark 

 for each 4 acres of the 11,000,000 acres in the Sacramento and 

 San Joaquin valleys, and that each pair raises an average of 4 



