
Summary of Colorado Breeding Ground Conditions - Continued 
Total Estimated Breeding Pairs 
Area goete "+g E952 1953 1954 1955 1956 _- 1957 
Fa 
GEESE 2/ 
Yampa Valley - 120 130 110 20 84 87— 
Brown's Park 21 12 8 15 6 8 
Total 141 142 118 35 90 95 

l/ White River Plateau not. run because much snow remained in the 
area at the time of the count. South Park not covered due to in- 
significance of area and weather conditions at the time of the flight. 
2/ Results on an intensive goose nesting study in this area has revealed 
these estimated breeding pair figures to be high. They are given 
here mainly for comparison with past estimates, and thus indicate 
the trend in status of this flock... 
Species composition of the duck breeding population was 
very similar to past years (see table below). Mallards still make up the 
bulk of the breeding birds (61.2 percent), and 1 no other species made up 
more than 10 percent of the total number. . 3 
Species Composition of the Colorado Breedin Populations’ 
Number —é“(é‘éPPe cent’ Species Cco=m position 
ee 54 1955 1956 1957 1954 19551956 1957 

Mallard 11295 9633 11027 9944 70.4 63.9 61.7 6122 
B.W. Teal 886 600 1010 1208 5.5 4.0 5.6 7.4 
Pintail 873 750 710 1023 5.5 5.0 4,0 6.2 
Gadwall 852 1874 1495 1150 5.3 12.4 8.3 7.1 
Baldpate 552 211 376 276 3.4 1.5 2.1 Lev 
Shoveler «542 220 387 375 3.4 1.5 2.2 2.3 
Cinn. Teal 442 509 862 562 2.8 3.4 4.8 3.5 
G. W. Teal 220 407 406 682 1.4 2.7 2.3 4,2 
Redhead 109 352 807 739 0.7 2.3 4.5 4.5 
Scaup '. 99° 369 - 556 201. 0.6 P40 Sul 1.2 
Ruddy 48 44 12 - 0.3 - 0.3 0.1 - 
Bufflehead = wd, 12 a = m 0.1 - 
Am.Merganser 114- 105 222: 100. 0:7 0.7 1.2 0:6 
| 0.0 100.0 
Total 16012 15074 17882 ----- ~ 100;0° 100.0 10 
