AERIAL WATERFOWL CENSUS 
MINNESOTA 
1949 
ee veoreces, 

ote 
SOT 

8 et FLIGHT LINE 
BIRDS PER SQUARE MILE, /949 

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N Lt} 
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th eee | e e 
Z, oe i 
~— sells > 
oor Fe ees 2 }t9 1/9 T ee by 
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a = -¢ , 0 te]\4 * es 
2 ; PSPs 

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Ip 
pao 9 Se ccease 
. ‘ase z * =i 
BIRDS PER SQUARE MILE, /947 
BIRDS PER SQUARE MILE, 1935" 
10.4 
