Table 36. Mallard Age Ratios from Bag-Checks in the Mississippi 
Flyway: Summary of Data Presented by Arthur S. Hawkins in Memos to 
the Mississippi Flyway Council 




Location Period Age Ratio Sample Size Source 
Minnesota 
Twin City 
Locker Plant Week prior to Oct. 16 0. 96 211 Memo 6 
% October 19 0.59 about 150 Memo 7 
Ws October 26 0.93 70 Memo 8 
om Month prior to Nov.15 0.65 507 Memo 9 
Roseau River 
Refuge Prior to Oct. 16 2.24 402 Memo 6 
Ohio 
Lake Erie Marshes 1.50 Memo 9 
Illinois 
Mouth Ill. River Oct. 31-Dec.7 0.43 857 Memo ll 
Missouri 
Duck Creek Area | 0.6 1283 Memo 11 
Arkansas 
Stuttgart Nov. 30-Dec. 1 0.3 1053 | Memo 11 
-85- 
