109 
Table II. - Brood Production - Caron Potholes: 

Species 1950 1951 1952 1953 1954 
Blue-winged teal 12 39 - 74 108 84 
Pintail ; 5 28 35 37 28 
Shoveler 11 19 13 32 26 
Mallard [ 13 10 58. 53 47 
Gadwall 8 11 . 12 14 24 
Baldpate 13 12 17 19 17 
Redhead é 2 5 7 me 
Lesser scaup a: . 7 14 24 12 
Green-winged teal ; l = 7 -— 3 
Canvasback - 1 3 3 4 
Ruddy duck 1 4 - 3 1 
Unidentified 21 15* 31% 12* 7 
Total 90 150 269 312 253 
Per Square Mile 21.1 35.3 63.3 73.4 59.5 
* Rafted broods on larger waters without females. Total count taken and 
.converted into broods by dividing by six. 
The data show total brood production to have been below the 1953 level in 
spite of an increase in breeding pairs. Only 41 percent of the pairs produced broods 
compared with 52 percent in 1953, 54 percent in 1952, 46 percent in 1951 and 37 
percent in 1950, 
On a species basis the mallards apparently again had a poor year, producing 
only 47 broods from 193 pairs, a 24 percent success. In 1953 success was 34 
percent. Pintails produced 28 broods from 79 pairs, a 35 percent success contrasted 
with 52 percent last year. The blue-winged teal which were exceptionally successful 
in producing broods last year (70 percent success) had another very successful 
season, From an estimated breeding population of 114 pairs, 84 broods were pro- 
duced, a breeding success of 73 percent. 
The outstanding feature of the 1954 season was, of course, the late spring 
and resulting delayed nesting season. This is reflected in a comparison of the percent 
of the total broods seen in June with that of August. In 1954, 15 percent were tallied 
on the June count; in 1953 (another late year) 17 percent, and in 1952 and 1951, 
relatively early years, 37 and 36 percent respectively. 
