
MINNESOTA - Continued 
Production Indices 
Production surveys were made by an aerial crew which covered the 
same transects that were flown in May. A survey was made also on the 
Chippewa National Forest Study area. A production survey has been carried 
out on this study area each year since 1937. The data collected during 
both surveys are as follows: 
Minnesota Mid«July Aerial 

‘Northwest Southwest _ State Total 
Size in Square Miles 12, 386 2h ,910 37,296 
Sample Size in Square Mi. 13.5 51 64.5 
Broods Actually Seen 5 16 
Broods/Square miles 0.37 0.31 0.33 
Brood. Index 4,583 1,722 12, 305 
Sample Late ‘Nesting Index 5 : 9 
Late Nesting/Square Mile 0037 0.18 
Late Nesting Index 4, 583 4 48h 9,067 
Ponds Actually Seen 120 416 
Ponds/Square Mile . 8.9 8.2 
Pond Index 110,235 204,262 314,497 
Coot Broods Seen 2 6 
Coot Brood/Square Mile Qa15 0.12 
Coot Brood Index 1,858 2,989 847 

Late Nesting Index 
SELES a mn 

