432 
somewhere in really dominant numbers, we have made general tables 
of ail the species which are on the “more abundant” lists of any section 
of the state in summer or in winter and of the more abundant species 
in any one of our thirteen habitats in either of these seasons. We have 
omitted from this tabulation the birds of spring and fall because of the 
brief periods of residence of many species and the extremely variable 
numbers of birds in any environment during the migration seasons. 
Taking up first the geographical divisions, we find that of the 83 
species of counted birds on our southern Illinois summer list, 22 were 
in our “more abundant” group and of the 41 winter species of that 
section, 14 were relatively abundant. The corresponding numbers of 
species for central Illinois were 68 and 13 respectively in summer and 
27 and 6 respectively in winter, and for northern Illinois they were 
95 and 15 in summer and 32 and 6 in winter. In our list for the state 
as a whole, we have 113 summer species on record of which 28 were 
classed as abundant, and 49 winter species 17 of which were abundant; 
that is, grouped geographically and seasonally from 16 to 35 per cent 
of our species fell in some one or more of our 85 per cent lists under 
these heads. 
* Morr ABUNDANT SUMMER AND WINTER Brrps BY SECTIONS OF THE STATE 
Orchard oriole 
Bronzed grackle 
Purple finch 
American goldfinch 
English sparrow 
Lapland longspur 
Vesper sparrow 
Grasshopper sparrow 
Lark sparrow 
Tree sparrow 
Field sparrow 
Slate-colored junco 
Song sparrow 
Summer Winter 
s CRAEN 
Killdeer xX _ —_ 
Bob-white x — — 
Mourning dove x x x 
Turkey vulture — == = 
Red-headed woodpecker x x = 
Flicker xX x x 
Kingbird x == = 
Prairie horned lark — x x 
Blue jay xX — = 
American crow - x x 
Bobolink — os x 
Cowbird xX x = 
Red-winged blackbird x xX xX 
Meadowlark x x x 
xX pas ae 
xX xX x 
— — x 
xX p< xX 
x 
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