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fields as in corn, suggests that it is not the grain in either case which 

 attracts them there, but rather the seeds of the weeds by which both 

 kinds of fields are generally covered in fall. Their preference for 

 pasture-lands is probably due to the amount of food found by them 

 in the droppings of stock, and to the greater abundance of insect life 

 in such a situation. Other comparative conclusions may best be post- 

 poned until the special assemblages of birds characterizing each of 

 these principal classes of situations are more fully discussed. 



The Principal Birds in each Crop. 



The next four tables give us the data of the distribution and 

 abundance of the principal species of birds as related to the principal 

 crops. In Table V. we have the numbers identified of the twelve most 

 abundant birds in each kind of crop, without reference to differences 

 in acreage. In Tables VI. -VIII. the list of species is reduced to nine 

 by dropping the three passing migrants. In Table VI. the number 

 of birds per section, or square mile, of each crop is given for each 

 of the species ; in Table VII. are the percentages of each species found 

 in the various crops ; and in Table VIII. we have in each crop column, 

 percentages showing for each species the ratio of the number of birds 



Table V. Number of Principal Birds in Principal Crops, 

 Indiana Line to Quincy 



*Sorg-hum. 



