313 



equal areas of each crop— an acre or a square mile; (3) we may 

 give the percentage of each of the species found in each of the 

 crops; 1 4 ) we may compare the actual numl:)ers of each species 

 in each -crop with the number which would occur there if the 

 species were uniformly distributed over its area, thus showing 

 where and in what degree the species is densely or sparsely dis- 

 tributed al)ove or below the average; or (5) we may compare 

 several species one with another, and each with all the rest, in 

 a way to show just how and how far they differ in their nu- 

 merical relations to the various crop areas they inhabit. All 

 these several forms of answer are contained in full in the fol- 

 lowingtables for our most al)undant Inrds, and from these I will 

 extract here and there only such data for discussion as seem 

 adapted to a general treatment of the suliject. 



From Table IV., showing the distribution of all birds with- 

 out distinction of species for the principal areas actually cov- 

 ered by this inspection, we see that 2249 of these birds were 

 found in pastures, 955 of them in corn fields, 454 in stubble 



TABLE IV. GENERAL DISTRIBUTION OF ALL BIRDS, BY CROPS, 

 INDIAlJA LINE TO QUINCY. 



*A11 forests "skippeil" if high or dense. 



