46 
Wisconsin--wetland densities by Region, 1973-77. 
TABLE B-30. 
Wetlands Recorded Per 259 Hectares 
977 
1976 | 
1975 
1974 

Northern Low 
1977 ‘1973 
1976 
1975 

Northern High 
1974 

1977 ©1973 
1976 

1975 

Southeast Central 
1974 

1973 — 
Wetland Type?/ 
0.6 
0.7 
5.6 3.0 3.4 0.9 BD 1.2 2.4 1.9 0.9 2.0 1.0 
Bal 
1.4 
I, Il 
0.6 0.6 0.8 0.9 0.9 0.8 0.7 0.5 0.6 0.6 0.3 
a | 
j 
0.9 
III 
] 
a: 
4 20 tq ] 
1.0 
3.0 
2.5 
3.4 
af 3.0 Jet 
0.5 
Lg 
1.7 aa 
Lg 
IV-V 
0.6 0.1 
0.7 
0.6 
1.9 
0.8 0.4 
14 
0.7 
0.7 0.3 0.7 
0.7 
0.5 
VII-VITI 
1.& +16 
fie 
ce 
0.1 
od 
1 
5 
0.1 
0.9 1.6 ] 
ee ] 
1.2 
1.4 
Streams 
0.5 6.2 2.2 
0.4 
0.3 
0.2 
0.3 
1.9 1.6 1.3 0.1 
ys 
0.9 
Ditches 
a/Based on classification system listed in March, Martz and Hunt of the Wisconsin Department of Natural Resources. 
47 
TABLE B-31. Wisconsin--breeding duck population estimates, 1973-19772/ 
a ee ee 
Blue-winged Other % Changes 
Regions and Year Mallard Teal Species Total Between Years 
I 
Southeast-Central 
1973 45 ,600 101,600 68 ,800 216,000 
1974 48,100 143,200 46 ,400 237,700 +10% 
1975 77,900 233,100 41 ,000 352 ,000 +48% 
1976 49 ,500 115,500 6,500 171,500 -51% 
1977 25,700 56,700 62,800 145,200 -15% 
Northern High 
1973 12,600 19,300 0 31,900 
1974 26,000 9,700 8,700 44,400 -39% 
1975 20,000 18,100 20,000 58,100 +31% 
1976 13,300 29 ,600 12,700 55 ,600 -4% 
1977 17,700 48 ,600 25,400 91,700 +65% 
Northern Low 
1973 36 ,800 65,600 18,700 121,100 
1974 23,500 12,000 3,000 38 ,500 -68% 
1975 12,800 7,200 4,100 24,100 -37% 
1976 10,800 11,100 27,400 49 ,300 +205% 
1977 16,000 28,900 200 45,100 -9% 
All Regions 
1973 94,900 186,500 87 ,500 368,900 
1974 97,500 164,800 58 ,000 320, 300 -13% 
- (3%) -(12%) - (34%) 
1975 110,700 258 ,400 65,100 414,200 +29% 
+(14%) +(57%) +(12%) 
1976 73,600 156,200 46,600 276,400 -33% 
- (34%) - (40%) - (28%) 
1977 59 ,400 134,200 88,400 282 ,000 
- (19%) - (14%) +(90%) +(2%) +2% 
4-Year Average 94,175 191,475 64,300 344 ,950 
a ne 
a/ 

~Data are expanded aerial counts based on ground surveys to adjust for birds missed by 
aerial crews. A change of 20% is statistically significant. Included are: Wood duck, 
black duck, shoveler, pintail, ringnecks, redheads, green-winged teal, gadwall, wigeon, 
ruddies and hooded mergansers. 
