433 
More ABUNDANT SUMMER AND WINTER Birps By SECTIONS OF THE STatTE—Concl’d 
Summer Winter 
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Cardinal 
Indigo bunting 
Dickcissel 
Barn swallow 
Maryland yellow-throat 
Mockingbird 
Brown thrasher 
Tufted titmouse 
Carolina chickadee 
American robin 
Bluebird 
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38 Species 
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Our habitat tables, on the other hand, show that of 113 summer 
species 48 were found on the 85 per cent list of one or more habitats 
and that of the 49 winter species 29 were on at least one of the 85 per 
cent. lists—ratios of 42 per cent. and 60 per cent. respectively. 
NUMBERS AND RATIOS OF SPECIES OF MORE 
ABUNDANT Brrps, BY SEASONS, SEC- 
TIONS, AND HABITATS 
SouTHERN ILLINOIS 
Total 85 per Ratios 
number cent. list per cent. 
Summer 83 22 27 
Winter 41 14 34 
CENTRAL ILLINOIS 
Summer 68 13 18 
Winter 27 : 6 22 
NorTHERN ILLINOIS 
Summer 95 15 16 
Winter 32 6 19 
WHOLE STATE 
Summer 113 28 25 
Winter 49 aby 35 
Hasirar Ratios 
Summer 113 48 42 
Winter 49 29 60 
The total number of species counted and recorded on our two lists 
of seasons and habitats is 125 and the number on the corresponding 
two “more abundant” lists is 63; that is, 50 per cent. of these species 
were found sufficiently abundant in some sectional or habitat situation 
to bring them into one or more of our “more abundant” groups. To this 
50 per cent we would add, if we could, a variable and unknown number 
of spring and fall migrants which remain in the state long enough to en- 
