In corn fields, quails, crow blackbirds, and robins were the most 
abundant species; in wheat, only prairie horned larks were common 
enough to call for special mention; in stubble, blackbirds and crows 
were in a large majority; in pastures, only juncos were notably above 
_ the average; in meadows, meadowlarks, robins, and quail were the 
principal species ; and those on plowed ground were juncos and prairie 
horned larks; in orchards, the junco greatly outnumbered all others; 
and in woods, robins, blackbirds, white-throated sparrows and juncos 
-_-were the most abundant species—all data of observation, correct for the 
_ time and place, but furnishing, so far as we can see, no obvious warrant 
for generalization or prediction. Our fall habitat lists of central and 
southern Illinois have little resemblance, as was to be expected in view 
___ of the differences in climate, topography, and the date of observations 
_ made in the two sections. 
Att Birps 1n Hapirars, Fart or 1906, SourHEerN ILLINOIS 
— ay 
4q ; Acres Nos. of birds |Birds per sq. mi. 
a 
- Corn 301.46 573 1216 : 
= (462) (981) 
ee Wheat 177.70 30 108 
ie Stubble 178.98 1116 4000 
4 7.4 ens») (697) 
Pasture 301.23 309 657 
Meadow 302.15 213 451 
Plowed ground 87.85 101 736 
Orchards 131.94 322 1562 
Woods 84.19 842 6401 
= (692) (5266) 
Shrubbery 18.54 45 1553 
Yards and gardens 49.63 42 542 
‘ Waste and fallow 117.22 383 2091 
on Miscellaneous 12.53 3 ; 153 
gg Note: Figures in parenthesis are remainders after subtracting crows and 
bronzed grackles. 
GENERAL SUMMARY OF THE More ABUNDANT Brreps 
cs We have repeatedly shown that relatively few species are repre- 
4 sented in a single region or habitat by a sufficient number of birds to 
have any important effect, ecological or economic, and that more species 
¥ consequently signify little or nothing in.the system of life at the time 
and place; but in this connection account must be taken of the fact that 
species insignificant in one environment may be of primary importance 
in another and that a complete list of those important in some situation 
oS or relationship is needed to give an adequate idea of the significance of 
birds as a class. As a contribution to such a list of Illinois birds present 
