197 
aggregate more than 90 per cent. of all the birds recorded during the 
_two summers covered by this discussion. 
NUMBERS OF PRINCIPAL BIRDS IDENTIFIED IN EACH SECTION, 
AND IN THE WHOLE STATE* 
(29 SPECIES) 
A. 0. U. 5 Ss. Cc. N. Whole 
numbers ebecics ni | m.| mH. | state 
273 Killdeer 87 23 64 174 
289 Quail 241 53 21 315 
316 Mourning dove 518 407 206. 1131 
406 Red-headed woodpecker 105 125 128 358 
412 Flicker 82 184 350 616 
444 Kingbird 119 52 139 310 
474b |Prairie horned lark 55 204 451 710 
477 Blue jay 111 37 52 200 
488 Crow 64 115 197 376 
494 Bobolink 5 2, 743 750 
495 Cowbird 116 1744 87 1947 
498 Red-winged blackbird 278 225 417 920 
501 Meadowlark 1293 630 536 2459 
506 Orchard oriole 103 3 6 112 
511b |Bronzed grackle 274 1111 1970 3355 
English sparrow 795 1865 2993 5653 
529 Goldfinch 74 58 257 389 
540 Vesper sparrow 1 22 151 174 
546 |Grasshopper sparrow 54 93 151 298 
552 Lark sparrow 93 6 7 106 
563 Field sparrow 322 - 59 49 430 
598 Indigo bunting 75 14 27 116 
604 Dickcissel 314 283 149 746 
613 Barn swallow 4 91 160 255 
681 Maryland yellow-throat 78 19 if 104 
703 Mockingbird 112 vg al 120 
705 Brown thrasher 137 133 38 308 
761 Robin 165 170 276 611 
766 Bluebird 96 22 79 197 
| Numbers of dominant species | 22 | 13 | 15 11 
* Black-face figures show dominant species in each section. 
CHANGE OF NUMBERS FROM NorTH TO SOUTH 
- In an earlier paper on the midsummer bird-life of Illinois, already 
cited, it was reported that, according to our data of 1907, the English 
sparrow decreased in numbers in the summer time from north to south 
in Illinois, but that the numbers of the native summer residents increased 
in that direction by something like 16 per cent. for central Illinois and 
