Vol. 20 , No. 2 
Page 3 
addition of nest boxes has "Ot ^ 9n ^g% n ‘eL C to"be d remarkably*stable numbers 
either study area. In particul , c.year period the number of 
^ ^ * on * 
on Danville B, from 16 to 20. 
i u ,4 , ;tt i e effect on the annual survival of adult 
Nest boxes have also ha Csauirrels tagged and later 
fox squirrels. Fa 11 -to-fa 11 recovery . percent (128/157) with boxes 
recovered) for adult ma es have averag d d ^ P For a<Ju , t females annual 
present and 80.6 percent ( 1 °o/ 13^) w i ttnou esent and 83-7 percent 
recovery rates were 81.1 P^^. o pr ig ’recovery rates for aduit squirrels 
For juvenile squirrels, however nest^ increase -ovary ^ratesjor 
both sexes. The annual —°*® r * r ph boxed area s than on the unboxed areas, 
significantly higher (£<0.05) on was highe r than for 
tZ * pproached a 5i9nificant difference 
Nest boxes apparently provide a table*fo^sheltering 
not provided by leaf nests. Most ° f h Un|ike gray squirrels, 
u5uanydena ne 
thus utilize most of the available tree cav.t.es. 
Responses of Prairie Chickens to HabUat Manipulati on R- L. W^teme.er, 
In the last monthly news '*“ e b 2 °ePt'habi ta^anH tf i n'ilial usage 
time interval between the establ.shment f rie chicken s attained, on 
by prairie chickens, and ( 2 ) the den =' initial use was based on the 
the seven sanctuary units ,n Jasper County. ^'*^ |th , n 0 . 25 mi , e of the 
establishment da ^ t " 9 re 9 ™ aed on the counts of male prairie chickens 
various units. u Bns,llfca 
on the booming grounds. 
r „ nrtll3r ies acquired between 1962 and 
in contrast to the 1 001 acres of aanctu^ ^ acquired Harion county 
1 C )7^ in Jasper County, 560 acr . arreaae and time, our 
between 1967 and 1974. Thus, from t e stan^ tQ hab itat manipulations 
experience in document. ng respons j aSDer P C ounty. Although Marion County now 
is less in Marion County than in Jasp r C 7^ i6q acres , on1y three units 
has four units ranging in size J°, t 3 ye ars) to test responses by prairie 
have been present long enough (at least 8 years; 
chickens. 
, „ nr rn::,s numrrs 
