Vo 1. 20, No. 9 
Page 4 
asssr 
squ rretl’had ^ P r» X ’ m ^ "l*"'" 9 age ° f the ^"S' the "others and young 
cju i r rc is h3d 3 n 3 v© raq© f*oo d intrjk? nf i^i 9 _i ' ^ 
kcal/day of digested energy? ihese vaUs present' a V 26 l™™ 9 * ° f . 5 ° 7 - 5 
;he f n^^j^?; 8 ( ?-“"i): ncrease in di9ested ^roTzt:r f e 
for trees and shrubs. P T he He™?! Ho^s? a'nTs^sIr^Sn 0 ?™*"°* 
nutrients and provide the ro ther squirrels with a rich a^d «r[ed'd?et. 
Females usually do not breed in winters fniim, i 
seed crops probably because they have been unable to build iVIuff° c ienT 
body fat reserves to sustain pregnancy. P suttlc ' enl: 
Table 4. Mean food consumption (g) and digested energy (kcal) per day for 
two fox squirrels nursing young, two nonbreeding adult females, and the same 
two mother squirrels 1 year later, 
Date 
% 
g/day 
kca1 di- 
gested/day 
g/day i 
> • Tuuuq 
kcal di- 
gested/day 
Dreea 1 n> 
g/day < 
q Females 
kcal di- 
gested/day 
1 Ye 
g/day 
ar Later 
kcal di- 
gested/day 
13 March 
2 weeks 
55-0 
I 96.9 
64.5 
225.9 
63.3 
232.3 
31.8 
118.7 
after birth 
of young) 
3 Apri 1 
13 Apri 1 
75.2 
89-7 
276 . 1 
335.4 
61.9 
83 . 1 
223.7 
306 . 1 
38.7 
45.4 
150.4 
165-6 
30.9 
22.8 
114.7 
87.2 
19 April 
82.3 
281.7 
81.4 
274.8 
43.7 
166.2 
27 April 
93-1 
343.6 
90.6 
324.5 
37-7 
134.4 
40.5 
162.6 
5 May 
99-3 
379-9 
111.7 
430.6 
34. 1 
126.1 
14 May 
C* weaning 
128.3 
487-4 
134 .1 
527.5 
40.2 
151.1 
42.9 
173-0 
age) 
Responses of 
Prairie Chickens to Habitat Manipulation 
R. 
L. Westemeier, 
J 
D. R. Vance 
As reported in the preceding newsletter (MWRL 20(8)-2-3) nest surres* 
