246 
Summary 
In the Lake Erie Marsh region there was an increase of wood duck 
broods with a decrease in mallards, black ducks and blue-winged teal. A fairly 
substantial increase in the average brood size was discovered. 
The stream surveys indicated an increase in the number of wood 
duck and mallard broods with a slight increase in the average brood size. 
At the Delaware Reservoir area in Central Ohio an increase was 
noted in the number of wood duck broods with a decrease in the mallards and 
blue -winged teal. A substantia] increase was noted in the average brood size. 
The wood duck nest box checks indicated about a 12 percent 
increase over last year in the degree of utilization. 
It would appear that state-wide there was a definite increase in 
the wood duck populations with a decrease in the mallard, black duck and 
blue-winged teal production. 
