Composition of ths Nasting Population 
In 1948, whils ws were developing our trapping technicus, it was realized 
that ws wers capturing o bisaesd sempls of tha waterfowl nasting on ths water 
bodisa upon which wa worked. This yaar, while there is probably atill some bias 
in favour of ths diving ducks, it is belisved that the proportion represented 
in ths birda captured in our banding traps givas a feirly good pictures of tha 
composition of the breeding pepulation on ths study area. 
In the 2,289 ducks banded ths percentags composition i® ss follows: 
Barrow's golden-sy¥9 43.5 percent, lsasar seaup 11.9 psreent, burflehead 14,1 
pereant, redhead 5.3 pereent, canvasback 1.8 psresnt, graen-wingsd teal 1.1 
percent, blus-winged teal 6.9 parcent, mallerd 1.3 percent, baldpats 7.97 percent, 
pintall 1,1 perecsnt, ruddy 3 parcant, and other species 1 percent. For ths 
peasons given abore the lesser scaup would tay? been in slightly largsr propor- 
tion had the banding been continusd later. Ruddy ducks are so difficult te 
trap thet they do net appgar in corract proportion. 
aG 
