MISSISSIPPI FLYWAY 
Whole counts were recorded for 43 of the 66 broods. Brood size ranged 
from three to 13, and average 7.3. Young per 100 miles is calculated to be 
337; identical to the figure for 1955. Brood size by age class was as follows: 
Class I, 9.0; Class II, 7.9; and, Class III, 6.0.: 
Flood waters, as previously stated, forced a postponement in the floating 
schedules for three transects. Because of this delay more than 50 percent of 
the total broods observed were at an advanced age, and consequently of smaller 
size, compared to the data collected in 1955. Last year 43 percent of the broods 
were in age Class I and four percent in the age Class III, compared to 36 and 
12 percent respectively in 1956. This year, broods- -per-100-miles is superior 
to young-per-100-miles for indicating the reproductive success of the wood duck 
in Indiana, : 
Table II - Wood Duck Broods Observed, By Transects and Age Classes - 1956 
Compared to 1955 and 1953-55 Average. 





1956 | Number of Broods by Age Class 
Length Date | I II III 
Transect in Miles Floated a b c a b c & 
Maumee > 15 6-14 1 1 2 
Elkhart 7 ee 6-13 - ] 1 
Iroquois 14 6-12 ] 2 1 1 
Mississinewa 13 6-11 ,_ ne 1 2 1 
Big Blue 12 6-18 2 6 3 1 
W.F. White 25 7-03 2 3 ] 4° #868 
Muscatatuck 19 5-22 | 2 7 4 2 
Salt 707 15 5-23 | 2 
Eel ce ate, ES 5-24 4 a 1 
Totals. 143. 5-22/7-03 i ie Ae te Mla re NS 
1956 Change from 1955 1953-55 1956-Change From Ave 
Transect Total No. % Average No. | %o 
Maumee 4 +2 «6.0 J 2210. 
Elkhart 2 ~ 4 . 3.7 es 1.7 
Iroquois ) 5 + 1 3 3.0 + 2.0 
Mississinewa 4 - 5 7.0 - 3.90 
Big Blue 12 +12 6.7 + 5.3 
W.F. White 18  » 2 19.0 - 1.0 
Muscatatuck 15 + 5 22.6 - 7.6 
Salt eae - j 4,3 - 1.3 
Eel 3 + 2 6.3 - 3.3 
Totals | 66 +10 +18 78.7 -12.7 -16 

