Table 37. Summary of Mallard Age Ratios in Supplemental Wing Collections (Cont'd). 
| Number of Wings 
Immature ul Unknown or Total e ratio 


Adult 
Flyway Location Date Male Female Male Female Incomplete Wings Ad 
Central . North Dakota 
Lower Souris Oct. 7-25 4 S 6 1 21 0.82 
Colorado Oct.30-Dec.1]1 12 13 16 6 3 50 11h 
Pacific Idaho 
Nampa Nov. 9 11 3 3 3 7 27 2.33 
Dec. 1 15 6 13 - = 3h 1.62 
Dec. 28 12 —3 9 3 1 28 1.2 
"30 1 6 “o 1.61 
a Utah 
° Bear River Oct. 1l-Nov. 1 21 17 66 36 0 10 0-37 
Nevada 
Fallon = h g 6 S 1 21 1.00 
California 
Tule Lake Oct. 13 7 10 17 18 0 52 0-48 
16 3 4 8 18 0 33 0-27 
21 u 2 12 17 0 36 0.21 
26 - 1 9 h 0 1 0.08 
Nov. 2 8 6 19 3h 0 67 0.26 
22 6 3 7 12 8) 28 0-47 
23 4 8 12 23 9) 47 0.34 
29 - - - 2 O 2 0-00 
Dec. 5-7 2 6 : h 0 18 oe 
16518-20 5 _0 7 ‘ 
. "39 3 “OL id 0 313 0.35 
