Robert B. Hamilton

Utilization Of Agricultural Wetlands In A Mississippi River Bottomland By Wood Duck And Hooded Merganser Broods

Forty artificial nesting cavities were placed in 5 wetland areas containing no natural tree cavities suitable as nest sites for wood ducks (Aix sponsa) or hooded mergansers (Mergus cucullatus). These wetlands were surrounded by agricultural fields; wetland sizes were between 0.4 ha and 10.6 ha. In 1976,5 successful wood duck nests were observed. In 1977, II successful wood duck nests and 4 successful hooded merganser nests were observed. Visual searches failed to discern the presence of broods or their hens after the days on which the broods exited their nest boxes. Two wood duck hens...

Derivation Of Northern Wood Ducks Harvested In Southern States Of The Mississippi Flyway

Over 2,400 first-year band recoveries of 144,800 northern banded wood ducks (Aix sponsa) were examined to identify the source of northern migrants harvested during 1950 through 1968 hunting seasons in Alabama, Arkansas, Kentucky, Louisiana, Mississippi, Tennessee, and Texas. Harvest trends for the seven-state area revealed that 20 percent of the northern migrants was derived from Eastern Canada and Atlantic Flyway production areas. However, 80 percent of the northern birds was obtained from two Mississippi Flyway production areas. Individual state derivation patterns of northern adults and...

Bird Populations in Even-Aged Loblolly Pine Forests of Southeastern Louisiana

Wintering and breeding-bird populations were determined for even-aged loblolly pine stands 6 years, 20 years, and 46 years old in Livingston Parish, Louisiana. Comparative data were collected in a natural stand. These stands supported bird populations lower in density and species diversity than the natural forest. As vegetative strata increased in a stand, the number and kinds ofbirds present, also increased.