Table II. - Wood Duck Nesting Box Success at Lake Odessa, Louisa County, Iowa. 
i ar ee a ae 
1950 
No. of Nesting Boxes 
Checked 26 
No. of Nesting Boxes 
Occupied 18 
No. of Nests Destroyed 
by Flood 0 
No. of Eggs Destroyed 
by Flood 0 
Total No. of Potentially 
Successful Eggs 158 
No. of Successful Nests 11 
No. of Ducklings Success- 
fully Hatched 129 
1951 
36 
13 pre - 
9 post - 
flood 
13 
108 wood duck 
1952 | 1953 
24 30 
18 15 
0 0 
0 0 
72 wood duck 237 * wood 111 duck 
Q merganser 38 merganser 17 merganser 
6 
68 
2K 2 ak 
2 ak 2 a 
1954 1955 
72 56 
(22 wood) (12 wood) 
(50 metal) (44 metal) 
11 6 
(7 wood duck) (5 wood duck) 
(4 merganser) (1 merganser) 
Not Estimated Not Estimated 
2m 2 
* Abnormal success in 1952 was caused by flooding of other nesting cavities and subsequent large 
scale dump nesting in these nesting boxes raised up above flood crest; the success does 
not indicate production trend. 
** Student observer not available on full time basis and consequently data not available. 
022 

