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FEB 7 1973 
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MONTHLY WILDLIFE RESEARCH LETTER 
Illinois Federal Aid Project W-66-R.y 
Department of Conservation and Natural History Survey, Cooperating 
Glen C. Sanderson and Eva Steger, Editors 
Urbana, Illinois 
January, 1979 
Vol. 22 , No. I 
R* E. Warner 
Manipulation of Pheasant Habitat 
County'Management^n^t 6 (FCMU)‘and/orr) P r° tS ° f r ° adSideS Seeded *h. Ford 
searched in^uneandjulyfor songb?rd nesM"? 1 R ° adSidas (FCGR) ha ve been 
songbird nests were found on lois^fUJ^ac^es?^ 5 ^' I TrT' I" ,978 ' 51 
1.2 nests per acre is similar to densities of 1 9 * a FCMU; th,s de nsity of 
and 1977, respectively. ' 2 and nests per acre in 1976 
Searches of 90 FCGR plots (57.7 acresY in 1070 : 
nests per acre; searches in I976 and 1977 indiritPd 30 average of 1.7 
respectively. " d 1977 ,nd,cated 1.0 and 2.2 nests per acre, 
the past *"3 ^yea r s ^ ^ 95 °pe rcen t' of S the se ^ f ° Und 0 ° brome ; a,fa >^ roadsides over 
Although these searches have documented that^sonalr ^ ed ” wln 9 f d blackbirds, 
important questions have not been answered JenaS? d * neSt ' n seeded roadsides, 
territorial behavior, and the influence of veqetatJonat^ ^ success, 
1 vers 1ty of species nesting in roadside seedinas compos.tion on the 
,. ' - v,v ', me influence of veaetai 
r 1 y of species nesting In roadside seedings. 
£co1ogy and Management of Squirrels 
C. M. 
L. P. 
Nixon, 
Hansen 
As reported in last month's research letter u 
maple are the best providers of cavities fir It’ b ? h ' b f sswood ' a " d sugar 
This analysis, however, did not consider t-hp . qu,rre nes ting and escape cover. 
formation. Large, slow-growing trees apparent W^e"" ° f S ' Ze °" cav,t V 
because wounds--for example, the loss of P a 1 !mK Y pron ® to cavity formation 
prevent rotting and formation of a cav?[y! may not heal rapidly enough to 
total trees on 63.5 a'cre^of U ha?d*od S forest a5S AI tho ”' th cavit,es and in 
make up only a small percentage of the \ A1 thou 9 b trees >12 inches dbh 
trees are found in this range F Iw trees of In***’ a . majorlt y of cavity-forming 
contained cavities. We recommend, therefore that^l^ 5 ,eSS , ? han 12 inches dbh 
considered in the retention of Dotent-iai • 1 r S ze as we * 1 as species be 
results, these trees should be at least l^Inrhe trees * For more immediate 
select large trees (>14 inches dhh^ nches dbh. Because timber harvesters 
made to save the caiity-form^ng tree, "°" SCI " e "<ious effort will have to be 
squirrels habitat. 9 9 which are an important component of 
