Table 3. Average, Maximum, and Minimum Percentages of Food Residues in Pellets Collected at Wintering Crow Roosts in the Western Part of the Study Area—1952-53-54.
Dec. 28-Jan. 11
Aug. 24-Sept. 6
Sept. 7-20
Oct. 5-18
Nov. 16-29
Dec. 14-27
Dec. 28-Jan. 10
Feb. 8-21
Number of pellets
62
5
38
65
56
22
96
32
No. of Collections
1
1
1
1
3
1
1
1
wheat
6.9
62.8
14.6
22.7
2.2
3.3
2.8
(100-10)
(99-35)
(90-10)
(90-10)
(95-10)
(90-30)
(50-10)
sorghum
29
1
22.4
31.2
41.2
42.5
32.4
21.6
(100-5)
(5)
(95-5)
(100-10)
(100-5)
(100-5)
(100-10)
(100-10)
sunflower seed
26.3
3.3
5.0
26.9
22.0
32.4
21.6
(90-5)
(95-5)
(60-10)
(95-3)
(90-5)
(100-5)
(80-10)
corn
11.4
19.0
12.4
4.5
14.0
11.4
14.1
1.2
(100-10)
(40-15)
(95-5)
(85-30)
(100-5)
(100-10)
(100-5)
(20-10)
oats
14.1
4.9
5.7
5.5
4.6
37.2
(100-10)
(80-15)
(70-5)
(75-5)
(95-5)
(100-10)
brome grass
1.4
.1
(85)
(10)
Other Grass
9.4
3.2
4.0
15.7
8.8
6.3
(95-5)
(80-20)
(90-10)
(95-10)
(100-10)
(50-20)
grape
trace
.1
(2)
(10)
pokeberry
.4
.5
(15)
(30-2)
spurge
.4
.2
(25)
(10-1)
ragweed
.1
.5
.2
(5)
(10-5)
(5)
misc. plant
1
.8
.8
.2
(50-1)
(30)
(80-2)
(3-2)
TOTAL PLANT
99.5
82.8
53.9
72.4
94.1
97.1
97.4
97.4
grasshopper
.1
6.0
8.9
10.5
1.4
.5
.3
(5)
(30)
(30-5)
(70-5)
(15-5)
(15-5)
(5)
beetle
.1
9
17.8
12.1
1.7
.9
.4
.9
(5)
(15-10)
(95-2)
(80-3)
(15-2)
(10-5)
(10-5)
(10-5)
ant
14.9
3.4
(95-73)
(85-5)
crayfish
.7
.8
.5
(10-5)
(50)
(50)
snail
.1
.1
.1
(5)
(5)
(5)
fish
.1
.1
(5)
(5)
snake
1.8
.9
(60-5)
(20)
eggshell
.3
.4
.6
1.1
(10-5)
(10)
(10-5)
(20-5)
mammal
2
2.2
1.9
.8
2.4
.7
.4
.3
(10-5)
(5-1)
(20-5)
(10-5)
(60-5)
(10-5)
(10-5)
(10)
TOTAL ANIMAL
.5
17.2
46.1
27.6
5.9
2.9
2.6
2.6
Table 4. Frequencies of Occurrence of Food Residues in Pellets Collected at Wintering Crow Roosts in the Western Part of the Study Area—1952-53-54.