Breeding Population Trends 
As was previously stated, the peak of migration came during the last week in 
March, The accompanying graph shows trends in population per square mile for the 
transects, each bar on the graph representing average population per square mile for 
all transects. In addition to counting total waterfowl seen, a record was kept of pairs 
that were assumed to be mated. This record appears in Table 1. 
Table 1. -- Number of Pairs Recorded During Spring Period 
Date Number of Pairs 
_ (Assumed to be. Mated) 
March 28 Few pairs seen. These were 
mostly pintails, probably migrants, 
and were not counted. 
April 21 27 
April 27 11 
May 2 86 
May 9 44 
May 17 46 
May 24 29 
June 14 3 
June 28 6 

Success of the Season 
Since there are no data for previous years it is rather difficult to say how 
successful the breeding season was, However, from general observations by the 
technicians in the field it is felt that the season was as good as last year. 
The number of broods seen and the average number of young per brood are 
shown in Table 2. The first brood was seen from the air on May 17. The first 
flightless bird, a black duck, was seen on July 26 while the first fall migrant, a 
blue-winged teal, was seen on August 23, 
Table 2. -- Results of Aerial brood counts 
Date No. Broods Seen Total No. Young Average Young 
per brood 
5/17/50 1 7 
6/14/50 1 13 
6/28/50 3 15 
7/12/50 8 31 
7/26/50 3 24 
8 /9/50 1 9 
8 /23/50 1 7 

TOTALS 18. 106 5. 89 
