
MISSISSIPPI FLYWAY 
As can be seen in the following table, the trend in the population 
of the principal duck species breeding in Wisconsin was slightly upward, 
as compared to the average for the period of 1951 through 1954. However, 
as compared to 1954, all the main species except the ringneck declined in 
numbers, with the largest reductions being indicated in the black duck and 
wood duck. The coot or mud hen experienced an increase in total numbers 
over the four-year average, but declined slightly from the number present 
in 1954, 
Table 1 - Wisconsin Waterfowl Breeding Pair Trends * 
77 | Percent Change 


* wie : ond of 1955 
Average Index 1954 1955 Index From 
Species 1951 thru 1954 Index % Lone M Index % Lone M Average 1954 
Mallard . 04 05 45 . 04 54 None -20 
B-w. Teal . 06 . 09 21 . 08 38 +33 -11 
Black Duck .005 . 008 ~ . 005 - None - 36 
Wood Duck . 006 . 009 39 . 006 19 None -33 
Ringneck .01 .O1 65 01 37 None None 
Total Ducks ~13 18 28 ~15 - +15 -17 
Average of 
1951-195 
Adult coot observed per acre eh os pelo em MIO 
. 04 .09 . 08 
Percent change of 1955 from 4100 11 
* Total estimated pairs based on pairs, lone males, 
lone females, and unidentified duck pairs 
and single ducks observed. Index figures 
are based on the number of pairs per acre 
sampled. 
Production Indices - 
Table 2 presented below contains the pertinent figures on the 1955 
Wisconsin waterfowl production picture, together with data from previous years. 
Table 2 - 1955 Waterfowl Production in Wisconsin 
Young Average _ % Duck 
Duck Pr. Indicated Breeding Indicated Brood Indicated Prs. on x 
Year Per Acre Change %F* Pair Change Size Change Br. Survey 

1951 . 078 - 16 1.46 - 6.5 - 43 
1952 . 092 +18% 19 2.58 +77% 6.6 42% 42 
Continued 
