The 1997 El Niño/Southern Oscillation (ENSO 97-98):
Biological observations possibly related to El Niño
Midwest
 
Midwest (IL, IN, IA, KY, MI, MN, MO, OH, and WI) / Great Lakes / Dakotas / Nebraska / Kansas
 
Fish
Birds
Other
September     24 
29
October     24
November      
December     14 
26
January     02 
05 
06
February     18
March     02 
09 
30
May 28
July     02
05
 
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