Vol. 13, No. 10 
Page 2 
3* Ecology and Management of Sguirrels C. M. Nixon 
A sample of milk was collected from each of eight female gray squirrels 
(Sciurus carolinensis) and the samples were pooled for analysis. The pooled 
sample, about 2 cc, was composed of 9-0 percent protein, 12.1 percent fat, 3.0 
percent lactose, 1.3 percent ash, 0.36 percent calcium, and 0.45 percent phosphorus. 
This analysis is virtually identical in content to that reported by the International 
Zoo Yearbook, 1962, for a single specimen. Both samples indicate that squirrel milk 
is considerably higher in protein and in fat than is whole milk from cows. Cow's 
milk, if used in the formulation of a substitute milk for preweaned gray squirrels, 
should be enriched with supplements. 
4. Responses of Bobwhites to Habitat Manipulation J. A. Ellis, 
D. R. Vance 
The mean weights recorded for subadult cock quail captured on both the Dale and 
Forbes areas by cock-and-hen traps were heavier during the summer of 1970 than in 
the summer of 1969. The trapping period extended from mid-May to mid-July both 
years. The mean weight of 136 subadult cocks on the Forbes Area in 1969 was 164.4 
+ 1.0 grams. In 1970 the mean weight of 63 subadult cocks on Forbes was 168.3 +0.7 
grams. This difference in mean weights was statistically significant (P<0.05)* 
On the Dale Area, the mean weight of 91 subadult cocks in 1969 was 16l.5 +0.8 
grams; in 1970, the mean weight of 75 subadult cocks was 164.4 + 0.8 grams. However* 
this difference in mean weights was not statistically significant (P>0.05)» The 
data tentatively suggest a correlation between population density during late winter 
and the weight of subadult cocks during summer (the lower the prebreeding density, 
the higher the mean weight of subadult cocks). 
5. Responses of Prairie Chickens to Habitat Manipulation R. L. Westemeler 
During the 8 -year period of I 963 - 7 O, the sizes of 88 incubated clutches of 
prairie chicken eggs at Bogota ranged from 6 to 17 eggs. The mean number of eggs 
per incubated clutch ranged from 10.7 in 1966 to 13*0 in 1970 and averaged 12.2 for 
the 8-year period. The mean number of fertile eggs per incubated clutch (77 
clutches) ranged from 9*8 in 1966 to 12.3 in 1970 and averaged 11.7 for the past 
8 years. The mean number of hatched eggs per successful nest (79 clutches) ranged 
from 9*8 in 1964 to 11.6 in 1970 and averaged 11.3 for the 8-year period. 
Although the means for clutch size, fertile eggs per clutch, and hatched eggs 
per clutch were higher in 1970 than in any of the preceding 7 years, the means for 
1970 were not significantly different from the means for the 1963^69 period when 
tested with Chi-square. A minimum of 428 chicks were hatched from 39 of the 61 nests 
found on the sanctuaries at Bogota in 1970. 
6. Rabbit Management G. B. Rose 
The annual fall censusing of cottontail rabbits on the 100-acre (40-hectare) 
4-H Area at Robert Allerton Park is being continued this fall, the 15th successive 
