TABLE E~11,--Trends in dike line breeding pair counts of waterfowl on four State 
refuges, Utah, 1958-63 



Ducks: 7 
Dabblers: 
Mallard------------+------ 731 783 
Gadwall------------------ 493 673 
American widgeon--------- 19 6 
Green-winged teal-------- 50 oy 
Blue-winged teal--------- 53 52 
Cinnamon teal------------ 637 863 
Shoveler -------~---------- 418 635 
Pintail------------------ 469 528 
Subtotal--------+------- 2,870 3,564 
Divers: 
Redhead------------------ 1,556 1,590 
Canvasback~-------+------- 1 2 
Scaup-------------------- 38 15 
Goldeneye-~---=----<----=- 1 -- 
Bufflehead--------------- 1 4 -- -- 1 
Ruddy duck--------------- 192 272 329 90 295 328 
Satter soa | 
Total ducks--------~--- 3,663 3,848 4, 389 4,379 4, 761 5,500 
Canada goose---~------------- 157 147 | 152 161 160 | 187 

TABLE E-12.--Percentage species composition of breeding populations of waterfowl, Utah, 1959-1963 

= Northern area Southern area 
Spé@tes 













Ducks: 
Dabblers: 
Mallard------------- 8 20.6 ley 14.2 23.0 26.2 22.2 
Gadwall-~------------ -6 10.7 10.2 12.0 7.3 Tol 10.8 
American widgeon---- 3 0.2 0.3 0.3 1.3 0.5 1.5 
Green-winged teal--- el 0.7 0.6 0.5 2.3 3.6 2.0 
Blue-winged teal---- 23 1.2 0.9 1.0 1.9 1.3 0.9 
Shoveler------------ 9 i eve 8.5 10.9 6.6 ee 7.8 
Pinteil------------- 8 9.3 9.7 8.5 16.8 12.2 16.1 
Divers: 
Redhead------------- 28.6 31.3 19.6 22.1 17.1 
Canvasback------~---- -- 0.2 “= == 1 obs. 
Scaup--------------- 0.1 O.4 1.2 0.8 1.6 
Ring-necked duck---- -- -- -- 0.2 -- 
Goldeneye----------- -- -- -- -- o-- 
Bufflehead---------- -- aie 0.2 -- 0,2 
Ruddy duck---------+- 6.2 5.9 7-5 4.9 8.1 

Total------------- 100.0 |100.0 | 100.0 | 100.0 | 100.0 100.0 j; 100.0 ] 100.0 | 100.0 | 100.0 

117 

