TABLE F-3.--Results of aerial brood counts conducted in Northwest Territories and Yukon, 1963 
Strata and size 



Number of broods 
Class;Cilass |Class ramon 
I II IIT 

Stratum 2 
(31.5 Sq- mi. )--- 
Stratum 3 
(18 sq. mi. )----- 
Stratum 4 
(108 sq. mi. )---- 
Stratum 6 
(13.5 Sqe- mi. )--- 
Stratum 7 
(148.5 sq. mi.)-- 
Stratum 8 
(27 sq. mi. )----- 
Stratum 10 
(36 Sq. mi. ) bial ni teal 
Total 
(382.5 sq. mi.) 

July 17 to 
August 3 53 128 Tl | 252 
: Possibly class III broods. 
136 

Average size of broods 


; Two 
yer adults Class Class 
(pairs) II III 
5.4 hob 
6.5 4.0 
4.8 “- 
Bi 4.0 
6.0 5.0 
3.8 4.0 
6.0 4d 
172 129 6.7 5.6 4.3 

Groups 
of 
3 to 10! 
29 
14 
16 
47 
20 
22 
181 
Percent 
change 
from 
1961 
+70 
+ 25 
- 30 
+ 26 
= 27 
=, Si 
- 4o 
