Table II. - Summary of Waterfowl Breeding Ground Trends in North Dakota, 1950 - 1955. 
Indices to Total Breeding Ducks 


Average Index Percent of Change of 1955 
Inclusive Index From: 
hI A Re Dah oe 
Mallard 195,593 152, 542 159, 252 - 18.6 + 4.4 
Pintail 351,530 186, 788 192, 829 ~ 45.1 + 3.2 
Blue-winged Teal 466, 800 275,666 361,314 - 22.6 + 31,1 
Gadwall 84,018 73,946 71,951 - 14,4 + 2.7 
Baldpate 30,434 27,182 | 31,179 + 2.4 + 14.7 
Shoveler 129, 535 73,410 98,573 - 23.9 | + 34.3 
Redhead 40, 311 42,919 48,447 + 20.2 + 12.9 
Canvasback 34, 344 15, 737 38, 374 | + 11.7 +143.8 
Scaup 41,257 25,126 167, 766* +306.6 +567. 7* 
Ruddy 20,160 12,697 19, 667 - 2.4 + 54.9 
Others 5,935 8,136 9,833 + 65.7 + 20.9 
2 ne 
Total Ducks 894, 149 1,199,185 - 14.3 + 34.1 
Coot 1,009 518 703 - 30.3 + 35.7 
I 
* For explanation see "Breeding Conditions" (p. 182). 


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