Table A-Ilb. Winter Waterfowl Survey, Central Flyway, January 1979. 

Percent change 
Percent change - From 
Species 1979 1978 from 1978 Average average 
Dabblers 
Mallard 1,575,000 2,212,000 -29 2,204,000 -29 
Black duck 6 9 -33 50 -88 
Mexican-like 127 270 -53 50 +154 
Mottled duck 31,400 38,700 -19 40,800 -23 
Gadwal ] 168,000 101,000 +66 191,000 -12 
American wigeon 82,000 121,000 -32 194,000 -58 
Green-winged teal ],201,000 479,000 +151 439,000 +174 
Blue-winged teal 1,600 2,500 -36 19,800 -92 
Cinnamon teal 70 ~ 
Northern shoveler 55,000 67,000 -18 79,000 -30 
Pintail 1,709,000 542,000 +215 1,018,000 +68 
Subtota | 4,825,000 3,565,000 +35 4,186,000 +15 
Divers 
Redhead 155,000 257,000 -40 295,000 -47 
Canvasback 50,000 37,000 +35 15,000 +233 
Scaup 29,000 53,000 -45 79,000 -63 
Ring-necked duck 2,700 6,800 -60 6,100 -56 
Goldeneye 9,100 11,000 -17 11,000 -17 
Buf flehead 8,000 5,500 +45 6,200 +29 
Ruddy duck 6,700 5,200 +29 4,600 +46 
Subtotal 261,000 376,000 -3] 417,000 -38 
Miscellaneous 
Mergansers 97,000 129,000 -25 73,000 +33 
Unidentified 18,300 19,500 - 6 36,000 -49 
Total ducks 5,201,000 4,089,000 +27 4,712,000 +10 
Geese? 
Blue and snow goose 801,000 1,205,000 -34 762,000 + § 
Ross' goose 9 - 
White-fronted goose 69,000 14] ,000 -5] 57,000 +2] 
Canada goose 483 ,000 583,000 -|7 476,000 + ] 
Total geese 1,353,000 1,928,000 -30 1,295,000 + 4 
Swans 
Whistling swan 13 1 +18 
Trumpeter swan 114 174 -35 
Total swans 127 185 -3] 
Coots 
American coot 265,000 196,800 +35 
Grand total 6,819,000 6,162,000 +] 
*AVerages for ducks are for the 1968-77 period and the 1972-76 period for geese. 
b : . 
Estimates of geese are from mid-December surveys. 
