MONTHLY WILDLIFE RESEARCH LETTER 
IAmcoX. 
V . 3 
v M0 ■ 1 
Department of Conservation and Natural History Survey, Cooperating 
T. G. Scott, Editor 
Urbana, Illinois 
October, I960 
Vol. 3, No. 9 
W-30-R-14 R. F. Labi sky, R. I. Smith 
Field investigations of pheasant nesting and its relation to land use 
on the intensively cultivated Sibley area are nearing completion for I960. The 
100 randomly selected 10-acre study plots (representing a 4.3 per cent sample 
of the 23,200-acre study area) that were searched for nests in 1957, 195S, and 
1959 were again searched in I960. Thus far, 281 nests have been located during 
the I960 nesting season, and 85 (30.2 per cent) of these nests have hatched. A 
comparison of the densities of established and hatched nests for the 4 years, 
1957 through I960, are presented in Table 1. 
Table 1. —Densities of established and hatched pheasant 
) nests, Sibley Study Area, 1957-60. 
Densities: Nests per 100 Acres of Land Area 
Years 
Nests Established 
Nests Hatched 
1957 
12.4* 
4.2 
195S 
26.6 
7.9 
1959 
23.6 
5.6 
I960** 
28.1 
8.5 
^Sample sizes (number of nests) can be obtained by removing decimal 
points in all figures. 
**Field work not complete for I960 as of this date of preparation of 
report. 
