
PACIFIC FLYWAY 
Percent Lone Males - Early Nesting Species - 1955 and 1956 
1955 1956 
Stratum A 77.5% 86.4% 
Stratum B 82.1% 86.6% 
Stratum C 72.7% 71.1% 
Province 78.6% 84.2% 
Breeding Population Indices by Species: 
PROVINCE 
1955 1956 Percent Change 
Pintail 783,570 692, 406 - 11.6 
Mallard 969,549 892,599 ot ey ee) 
Baldpate 177,456 154, 828 - 12.7 
Shoveler 172,218 168, 118 - 2.4 
Gadwall 61,519 — 84,225 + 36.9 
Blue-winged Teal 216, 864 126, 054 - 41.9 
Green-winged Teal 54,640 26,612 - 51.3 
Scaup 249,042 265, 002 + 6.4 
Canvasback 47,602 53,310 ‘+ 12,0 
Redhead 59, 848 58, 312 - 2.6 
Ruddy Duck 20, 814 19,505 nf 64,3 
Bufflehead 12,550 16,271 + 29.6 
Goldeneye 4,675 6,496 + 38.9 
Ringneck 414 3,547 +757.0 
Scoter - 40, 881 - 
Total 2, 608, 166 - 7.9 
2, 830, 761 
a i 
Intensive ground studies indicate that aerial visibility conditions may 
have been considerably worse than in 1955, resulting in a lesser portion of the 
breeding population being seen. It is concluded, therefore, that the breeding 
population was at least equal to 1955, and may have been larger. 
Production Indices - 
The brood index for Stratum C nearly doubled this year despite the poor 
water conditions. Brood sizes were also larger but there seems to be little 
evidence of a late hatch, and, as a result, the total production is slightly below 
that of 1955. 
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