207 
Table III. - Summary of Waterfowl Breeding Ground Trends in North Dakota - 
1948 - 1954, 
Indices to Total Breeding Ducks 
Percent of Change of 


Ave. Index 1954 Index 
Incl, From 
Species 1948 - 1953 1953 Index 1954 Index Average 1953 
Mallard 195,496 202,739 152, 542 -22.0 -24.7 
Pintail 392,588 268, 564 186,788 ~-52.4 -30.5 
B-w. teal - 473,874 555,851 275, 666 -41,9 -50.4 
G-w. teal 5, 276% 3,218 7,064 +33.9 +119.5 
Gadwall 88, 753 120, 093 73,946 -16.7 -38.4 
Baldpate 28,101 31, 888 27,182 - 3.3 -~14.8 
Shoveler 152, 365 114,973 73,410 -51.8 -36,2 
Total Puddlers 1 , 336, 453 1,297, 326 796, 598 -40.2 -38.6 
Redhead 40,497 40,372 42,919 4+ 6.0 + 6.3 
Canvasback 30,877 31,303 15,737 -49.0 ~49.7 
Scaup 40, 887 77,234 25,126 -38.5 -67.5 
Ring -necked T T - : z 
Bufflehead T T = L a, 
Ruddy 21,355 13, 604 12,697 -40.5 - 6.7 
Total Divers 133,616 162,513 96,479 ~26.9 -39.9 
Total Ducks 1 , 470, 069 1,459, 839 893,077 -38.9 -38.7 
Coot 945 533 518 -45.1 - 2.8 

Index to Water Conditions: Equals number of water areas per 
Square mile times the square miles in the area 
sampled. 
Ave. Index % Change 1954 Index From 
1950 - 1953 1953 Index 1954 Index Average 1953 
509, 293 429, 643 239, 874 -52.9 ~44,2 
* Average for 1952 and 1953 only. 
