42 
Table B-21. 
for the entire state, 
Species 
Dabblers 
Mallard 
Gadwal 1 
Cinnamon teal 
Shoveler 
Pintail 
Subtotal 
Divers 
Canvasback 
Redhead 
Scaup 
Ruddy duck 
Subtotal 
Miscellaneous 
Total ducks 
Canada goose 
Coot 
2A comparative summary of nesting pairs of waterfowl] for the past four seasons, 
1975 
51,800 
5,230 
10,380 
1,250 
3,160 
71,820 
210 
1,980 
170 
3, 389 
5,749 
390 
17,989 
1,250 
92,96) 
1976 
36,959 
3,930 
8,970 
450 
1 yl) 
91,150 
130 
1,639 
150 
1,239 
3,14) 
23) 
54,520 
930 
34,079 
1977 
47,319 
5,419 
9,56) 
89) 
2,059) 
65,339 
89 
1,859 
550 
1,239 
35/19 
519 
69,559 
bs 135 
48 ,469 
Estimated total nesting pairs 
1978 
49,929 
64599 
7,969 
1,160 
A ,48N 
69,220 
130 
1,270 
590 
1,830 
3,82) 
759 
64,799 
1,349 
17,269 
California -- Estimated total nesting pairs and fall population indices 
1975-78. 
Fall population indices 
1975 
226 ,829 
31,700 
46,820 
7,219 
15,620 
328,179 
1,939 
11,260 
970 
18,719 
31,979 
1,640 
361,789 
22,890 
258,469 
1976 
167,979 
23,989 
42,219 
2,219 
8,599 
243,979 
629 
9,599 
88) 
6,459 
17,459 
1,229 
262,640 
18,580 
163,770 
Toa, 1978 
297,890 171,049 
32,639 33,780 
45,669 32,82) 
4,310 5,940 
9,969 25,740 
309,599 268,920 
530 700 
10,870 8,910 
3,420 4,880 
6,160 8,409 
2'), 989, e421, 999 
2,420 4,009 
323,990 294,919 
21,669—,. 21,650 
234,790 87,400 
together with final fall population including young plus resident adults is shown 
in the following table. 
preceding tables. 
These figures for each year have been derived from the 
In almost all cases the figures shown for "nesting pairs" are 
more accurate than those indicating "fall population indices." 

43 
Table B-22. Colorado -- Summary of duck breeding pair population estimates in 
selected areas, 1978. 
ee oe ee ee ee 
ee me a ee ae es ee i ew ee a ww wee ew ee emi 
ee — 
—-e— «0c eee 
Total estimated breeding pairs Percent change 
long-term From From long-term 
Area 1978 19772 average 1977 average 
San Luis Valley® 28,524 27,855 ra) 
North Park 9,633 Re, LS - 44 
South Platte Valley 19,182 6,773 +183 
Cache la Poudre Valley 12,674 3,662 +246 
Yampa Valley 1,708 2,189 2,730 —722.0 - 37 
Brown's Park 805 1,009 1,141 - 2082 - 29 
Total 72,526 59,276 + 22 
LS ES A ee ee me em em oe et ee ee ee es re ee ee en ee en oe eee ee os ee ee es 
4Estimates not obtained for most areas in 1977. 
San Luis Valley and North Park averages are based on results of 1964 through 1977 
and 1968 through 1977 surveys, respectively, because of changes in survey methods 
utilized prior to those dates. Figures for other areas are 22 year averages. 
CAerial counts corrected by species from visibility ratios obtained in the San 
Luis Valley. 
