TABLE b- 37.—Waterfowl brood and late-nesting indexes by stratum 
compared to previous year and long-term averages, 
tri-State area, July 1965 
[Index numbers in thousands] 
Species 
Stratum 
Total 
Average 
1959- 
1965 
Percent change 
from— 
East 
Central 
West 
1964 
1965 
1964 
Average 
Broods: 
Duck brood index- 
14.6 
14.9 
2.9 
31.7 
32.4 
58.5 
+ 2.2 
- 44.6 
Average brood size*— 
4.7 
5.6 
4.0 
6.0 
4.9 
5.0 
- 18.3 
- 02.0 
Coot brood index- 
.6 
3.3 
— 
2.9 
3.9 
3.5 
+ 34.5 
+ 11.4 
Late-nesting index: 2 
Dabblers: 
Mallard—-—-—-— 
10.9 
19.1 
4.1 
23.4 
34.1 
30.3 
+ 45.7 
+ 12.5 
Gadwall——- 
6.1 
17.2 
3.3 
9.2 
26.6 
10.0 
+189.1 
+166.0 
Widgeon- 
1.2 
— 
— 
— 
1.2 
6.0 
— 
- 80.0 
Green-winged teal — 
.1 
— 
— 
Blue-winged teal- 
10.9 
12.9 
2.4 
30.1 
26.2 
21.9 
- 13.0 
+ 19.6 
Shoveler —-- 
-- 
— 
-- 
1.8 
-- 
.6 
— 
— 
Pintail. 
— 
— 
3.9 
— 
-- 
Subtotal- 
29.1 
49.2 
9.8 
64.5 
88.1 
67.2 
+ 36.6 
+ 31.1 
Divers: 
Redhead —- 
2.4 
1.8 
— 
2.5 
4.2 
3.1 
+ 68.0 
+ 35.5 
Canvasback—-- 
— 
— 
— 
.4 
— 
.2 
— 
— 
4 
scaup 
Ring-necked duck- 
— 
• ~ 
.7 
— 
— 
Ruddy duck—-— 
3.1 
5.1 
— 
2.6 
8.2 
7.5 
+215.4 
+ 9.3 
Subtotal—- 
5.5 
6.9 
— 
5.5 
12.4 
11.9 
+125.5 
+ 4.2 
Grand total- 
34.6 
56.1 
9.8 
70.0 
100.5 
79.1 
+ 43.6 
+ 27.1 
1 Class II and IU broods only. 
2 As indicated by adult pairs and singles. 
66 
