The wood duck (Aix sponsa L.) populations of Mississippi River Pool 10 were studied during the springs of 1960-1964. The major nesting areas were found along the lower 3 miles of tributary valleys and on oak-covered bluffs. Only 35% of the pairs associated with Pool 10 nested in the 50 square miles of bottomlands. Distribution of pairs among habitat types was similar for 480 pairs in 1962 as was true for 530 pairs in 1963. Morning and evening flight counts and pair counts on sample transects were used to estimate numbers. Migration, sex ratios, nesting activities, local movements and population fluctuations were also observed.
Proceedings of the Iowa Academy of Science
©1965 Iowa Academy of Science, Inc.
"Spring Wood Duck Population of Mississippi River Pool 10,"
Proceedings of the Iowa Academy of Science, 72(1), 218-223.
Available at: https://scholarworks.uni.edu/pias/vol72/iss1/33