TABLE E-29, --Percentage species composition of duck breeding 
population, Michigan, 1960 and 1961 

Species 






Wallard-------~------------+.--- 
Black duck-----~-----------~---- 
Blue-winged teal------------ tos 
ee ee ee ee ee 

a ek ae a ee 
ee ae ae oe eee ae ee 
TABLE E-30. --Duck breeding population indexes, Michigan, 1951-61 
, : Potential breeders 
Lineal miles per lineal mile 
censused 
Wood duck All species 

TABLE E-31, --Adult wood ducks observed during April-May 
surveys, Indiana, 1952-61 f 
{ Survey of 3 streams totaling 47 miles] 
Birds observed 

100 
