Table 6 = Waterfowl Indices, 1957 - Part 1 
Stratum A 
Percent 
Change _.- 
Stratum B 
Percent 
Ships OBR Ss mee 
Species 1956 1957 --. 1956 - 

ve 
Pintail 406160 337782 - 17 179392 157710 ~ 12 
Mallard 323770 329811 + 2 463326 616341 + 33 
Baldpate 74671 58646 - 2l 65598 87279 + 33 
Shoveler 97995 82306 - 16 61040 63526 + 4 
Gadwall 38594 22317 - 42 40049 35630 - lil 
Blue-winged Teal 49082 48165 + Tr. 81479 83274 + 2 
Green-winged Teal 6964 8977 + 29 15191 21958 + 45 
Scaup 100177 106805 + 7 128019 193302 + 51 
Canvasback 8306 8474 + 2 36320 44054 + 21 
Redhead 18039 14347 - 20 33006 27344 - 17 
Ruddy Duck 5789 1258 - 78 12750 11048 - 13 
Bufflehead 2433 1846 - 24 13120 15329 + 17 
Goldeneye 1930 755 + 61 3729 2624 - 30 
Ringneck 1007 - 2624 - 
Scoter 1846 1762 - 5 23891 - 

