TABLE B-6. —Aerial brood counts in Northwest Territories and Yukon, 
July and August 1964 
Number of broods 
Total 1 
broods 
Average size of broods 
Groups 
Percent 
change 
from 
1961 
Strata and size 
Class 
I 
Class 
H 
Class 
in 
Single 
adults 
Pairs 
Class 
1 
Class 
n 
Class 
in 
of 
3 to 10 2 
Stratum 2 
(31.5 sq. mi.) - 
9 
24 
6 
39 
75 
31 
4.0 
4.5 
4.7 
30 
-90 
Stratum 3 
(18 sq. mi.) - 
— 
20 
— 
20 
8 
9 
— 
6.4 
— 
9 
+300 
Stratum 4 
(85.5 sq. mi.)- 
5 
27 
1 
35 
22 
14 
6.0 
5,9 
5.0 
7 
+170 
Stratum 6 
(13.5 sq. mi.)- 
8 
31 
5 
45 
4 
4 
8.0 
6.4 
4.0 
9 
+87 
Stratum 7 
(148.5 sq. mi.)- 
38 
103 
9 
153 
58 
33 
6.3 
4.0 
5.1 
37 
+84 
Stratum 8 
(27 sq. mi.)- 
12 
32 
5 
51 
16 
12 
5.0 
5.8 
6.2 
16 
+325 
Stratum 10 
(36 sq. mi.)- 
9 
66 
2 
81 
17 
16 
4.6 
5.2 
4.5 
20 
+100 
Total 
(360 sq. mi.)- 
81 
303 
28 
424 
200 
119 
5.5 
5.8 
5.0 
128 
+68 
■*Total greater than sum of classes with addition of unclassified. 
2 Possibly class HI broods. 
55 
