Wood Duck Stream Survey Data 
Survey Route Number = Wood Ducks Counte Date of 
and Miles Censused M! F4 prs.” Unid.” Total Census 
1. 8 Miles 4 4 May 9, 1953 
i l ] 2 May ll, 1954 
2. 7 Miles 
Route abandoned in 1954 because stream channel straightened. 
3. 7 Miles route established in 1954 


1 0 2 5 May 11, 1954 
4. 11 Miles 3 2 6 17 May 13, 1953 
" 2 2 2 6 May 6, 1954 
5, 13 Miles 1 3 7 May 14, 1953 
tt 1 1 2 May 13, 1954 
6. 12 Miles route established in 1954 
3 l 4 May 10, 1954 
7. 18 Miles 6 5 4 15 May 5, 1953 
a 1 ] 5 8 May 7, 1954 
8. 9 Miles 1 l 3 May 6, 1953 
M ] 1 May 5, 1954 
66 Miles Total 11 7 10 12 50 May 5-14, 1953 
all Routes 
78 Miles Total 9 5 3 8 28 May 5-13, 1954 
all Routes 
1 Males 
2. Females 
3. Pairs 
4. Unidentified as to sex 
Production Indices - 
On-the-spot check counts in the prairie marshes of northwest Iowa 
each spring and summer since 1949, plus aerial coverage of the same 
marsh units since 1952, have provided a studied opinion as to the 
production trends of blue-winged teal and mallards. Blue-winged teal 
constitutes the most numerous nesting species in the remaining prairie 
marshes, and the mallard is not far behind. Production of these two 
species in 1954 remained about the same as in 1952 or 1953 with no 
appreciable change in nesting numbers. With the exception of increased 
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