COMPREHENSIVE LIST 



As previously stated, there are certain species of 

 birds Vhich are confined during the breeding season 

 to the northern third (more or less) of Illinois, and 

 others which breed only in the southern third (more 

 or less). These, together with the trees peculiar to 

 each section, and, therefore, also characterizing the two 

 extreme faunal areas, are, in part, the following: — 



Illinois birds which breed only in the Northern Third 

 {more or less) of the state. 



Wilson's Snipe, Solitary Sandpiper, Wilson's Phala- 

 rope, Yellow-bellied Sapsucker, Least Flycatcher, 

 Bobolink, Yellow-headed Blackbird, Purple Finch, 

 Rose-breasted Grosbeak, Savanna Sparrow, Nelson's 

 Sparrow, White- throated Sparrow, Song Sparrow 

 (except along the Wabash River), Philadelphia 

 Vireo, Golden-winged Warbler, Nashville Warbler, 

 Chestnut-sided Warbler, Grinnell's Water-thrush, 

 Short-billed Marsh Wren, Brown Creeper, Red-breast- 

 ed Nuthatch, Chickadee,** Veery. 



Illinois trees occurring only in the northern third 

 {more or less) of the state. 



White Pine, Jack Pine, Larch (Tamarack), Arbor- 

 vitae, Aspen, Balsam Poplar, Gray Birch, Paper Birch, 

 Hill's Oak, Cork Elm, Mountain Ash, Pin Cherry, 

 Choke Cherry, Canada Plum. 



Illinois birds breeding or at least occurring in sum- 

 mer only in the southern third {more or less) of the 

 state. 



Water Turkey, Mexican Cormorant, Wood Ibis, 

 Snowy Egret, Reddish Egret, Little Blue Heron, Yel- 

 low-crowned Night Heron, Black Vulture, Mississippi 

 Kite, Chuck-will's widow. Blue Grosbeak, Swainson's 

 Warbler, Bachman's Warbler, Carolina Chickadee. To 

 these might be added several species were they not 

 now completely extirpated, among them the Carolina 

 Paroquet and the Ivory-billed Woodpecker. 



Illinois trees occurring only in the southern third 

 {more or less) of the state. 



Bald Cypress, Pecan, Water Hickory, Arkansas 

 Hickory, Swamp Cottonwood, Ward's Willow, Span- 

 ish Oak, Water Oak, Willow Oak, Overcup Oak, Cow 



36 



