COMPREHENSIVE LIST 



italics: Wilson's Phalarope, Marbled Godwit, Ferru- 

 ginous Rough-legged Hawk, Swainson's Hawk, Prairie 

 Falcon, yellow-headed Blackbird, Western Meadow- 

 lark, Smith's Longspur, McCown's Longspur, Le 

 Conte's Sparrow, Harris' Sparrow, Clay-colored Spar- 

 row, Montana Junco and Bell's Vireo. 



ROBERT RIDGWAY. 



aSee the Biological Survey Zone Map of North America, 

 published with the American Ornithologists' Union Check List, 

 third edition. 



&As explained by Hopkins in the Scientific Monthly, Vol. 8, 

 June, 1919, pages 495 to 513. 



cSpencer Trotter, M. D. The Faunal Divisions of Eastern North 

 America. Journal of the Academy of Natural Sciences of Phila- 

 delphia, Vol. XV, Second Series, 1912, pp. 297-218. 



dOf course the northern species of (P. atricapillus) is meant, 

 the Chickadee of southern Illinois being P. carolinensis. 



Explanation 



For the sake of compactness and to avoid repeti- 

 tion of unnecessary printing, abbreviations and sym- 

 bols have been used largely throughout this list. 

 Thus we have, for example in heavy faced type, 

 wherever appearing immediately after the name of 

 bird, the following : 



P. R. Permanent resident. Resident, or to be 

 found the year round. 



S. R. Summer resident. Present during the 

 warmer months only and usually found nesting. 



T. V. Transient visitant. A migrant, usually 

 occurring both spring and fall ; simply passing 

 through. 



W. V. Winter visitant. Present during the colder 

 months only. 



In cases, however, where these letters have been 

 used in the body of the text a lighter-faced type has 

 been employed. 



The following capitals also have been used, viz : 



N. Northern Illinois. 



C. Central Illinois. 



S. Southern Illinois. 



N. C. S. would therefore, mean the species is to be 

 met with in practically all parts, at least the three 

 divisions of the state. 



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