
CENTRAL FLYWAY 
l/ Data derived from permanent transect records set up for the 1956 
season. Data are corrected for unidentified pairs. 
Production Data 
Early flooding in the Yampa Valley destroyed most goose 
nests so that final goose production was only a fraction of the previous 
years. The Brown's Park fared somewhat better, with final production 
about the same as 1956. 
Conclusions 
oS TP 
Considering the slightly reduced duck breeding population, 
the cold, wet spring; and current excellent water conditions, it is 
believed that the fall flight will be below that for last year, and probably 
Similar to that for 1954. Geese present a far different picture. There 
were probably fewer geese produced from wild breeding flocks in 
northwest Colorado than ever before. This is definitely a cause for alarm 
and concern, and ali.protection possible should be given these birds. 
NEBRASKA 
Weather and Water Conditions 

“The entire sandhills region of Nebraska was under the influ- 
ence of a severe drought at the outset of the 1957 breeding season. All 
the small lakes and potholes and many cof the larger lakes and marshes 
were dry in mid-April and only a very limited amount of habitat was 
available to the early migrants, particularly in the eastern sandhills. 
However, above average amounts of rainfall in late April and May relieved 
the drought conditions and caused a gradual accumulation of surface waiter 
which made a relative abundance of habitat available to the late migrants. 
Rainfall during June and July was sufficient to maintain most 
water areas in the western and central sandhills; however, many of the 
wet meadow and pothole areas in the eastern sandhills were lost during 
July when rainfall was slightly below average. The water levels in all 
lakes was excellent and no significant brood loss was noted as a result of 
the dry<up of these temporary-«type water areas. 
63 
