Table l. 
Summary 
Estimated Population 
of Duck Breeding Ground Survey - Wyoming 1958 - 1959 



Pairs % Change  % Change From ‘Total Birds % Change ¢ Change F 
Species 1958 -:1959_~——sFrom 1958 1955-58 Ave. 1958 1959 From 1958 1955-5¢ Av 
Mallard 32,946 42,887 30.2 6 081 109,432 2.0 2, 
Pintail 11,020 9,506 , 15.9 f 3h°y Ke 2h 731 / 26.4 yf shi 
Teal 7,347 8,102 # 10.3 f 21.8 15,117 19,121 £ 26.5 - ehOe0 
Shoveler 3,298 4,051 # 22.8 “fe BST 7,395 8,426 f 13.9 4 12.4 
Gadwall 3,077 5,887 #£ 91.3 /# 127.4 6,157 12,422 # 101.8 /# 121.8 
Baldpate 3,781 3,457 - 9. f 1.2 7,894 7,238 - 91 f 17.4 
Redhead 268 216 - 2h.1 - 135.6 533 -2,971 / 457.4 # 208.8 
Ruddy - 107 - - 100.0 - 100.0 860 - - 100.0 - 100.0 
Scaup 214 702 =f 228.0 f 112.7 430.02, 484 4 477.7 f 282.7 
Canvasback - 108 # 108.0 # 108.0 - 216 / 216.0 f 216.0 
Goldeneye os 108 # 108.0 - 13.0 - 216 / 216.0 =e ed 
Coot : 1,569 5,833 / 271.8 f 245.6 3,405 13,340 f# 291.6 f 212.6 
Am. Merganser 1,890 1,728 - 9.4 - 45.1 4,919 §=3,€18 - 36.0 ~ 33.0 
Unidentified 1,514 2,917 #£ 92.7 A 3540 16,853 31,166 f 84.9 - 5le5 
Total £ 39.1 

67,031 77,941 
f 
16.3 f 24.3 
171,979 218,483 
J 
27.0 
oO 
if 
I: by 
° 
