f 
Vol. 23, No. 3 
Page ** 
The second decrease occurred from the end of Hay to the first part of June. 
This is the pre-fawning and fawning period in central Illinois, and the decrease 
in the number of deer per group reflected the isolation of adult females in 
preparation for fawning. 
Table 2. 
Observations 
of marked and unmarked 
white-tailed deer 
by age 
and sex 
for 2-week 
periods 15 
February 
through 
30 June 
1980 . 
Groups 
Mean 
of 
Adults- 
number 
deer 
b 
deer/ 
Period 
seen 
Male 
Female 
Unk. 
Fawns— 
Unk. 
Total 
group 
15-28 Feb. 
8 
7 
3 
16 
26 
3.25 
1-15 Mar. 
15 
9 
3 
22 
63 
97 
6.**7 
16-31 Mar. 
27 
18 
28 
65 
111 
**.11 
1-15 Apr. 
6 ** 
2 
22 
1 
**** 
226 
295 
**.61 
16-30 Apr. 
33 
3 
15 
35 
71 
12 ** 
3.76 
1-15 May 
32 
11 
23 
36 
70 
2 .19 
16-31 May 
11 
1 
5 
15 
10 
31 
2.82 
1-15 June 
8 
8 ^ 
2 
10 
1.25 
16-30 June 
6 
2 
2 
5 
2 
11 
1.83 
^Adult - >1 year. 
—Fawns - •<£ 1 year. 
^Deer born in 1979 considered to be adults after 1 June 1980. 
