On ths Yukoo-Kuskokwim delta Spencer found no avidenes that the t. tri 
native take was a Significant factor in waterfowl production thers. Of the 
estimated 1,600 people living on the delta, some JOO live close to good 
waterfowl arsas. Thess seni-nomadic, relatively primitive people take water- 
fowl when fish or other foods are not aveailahls, but each family probably did 
not get more than lis "fair shars" of ths continental supply of waterfowl. 
Goose drivas heave not tsen held for several years on the delta, probably 
beacause the men were employsd at ths canneries during ths summer. 
Cutting down or sliminating egg collecting by natives probably would be 
tha moat beneficial action that could be taken so far ss humen factcrs are 
concerned. An sducational program along these lines should be coupled with 
a liberalization of regulations to permit thess people te takes lefally some 
waterfowl for food. 
Of ths waterfowl predators, the glaucous gull is the most successful of 
those observed, at least on young birds. These large gulls harass and kill 
larg numbers of ducklings and goslings in the Innoke-lowsr Yuko n and on the 
Yukou-Kuskokwir delta. The gulls ara less important as a predator on Kotrebus 
Sount and on the Arctic coast the numbars art so few as to make them an ynim- 
portant factor thers, 
Jase@srs are reputed to be ao serious predator but both the 1948 and 1949 
woTk indieste that they are not £8 important as the large gulls. HWeither dows 
ths bald sagle appear to be an afficient waterfowl pradator. 
Foxes, stray doga, jeateers and poasibly ground squirrels may destroy many 
nests but the eaxtent of this type of destruction is unknom. 
C. Summary of Summer Banding Operations 
Banding locations ars shown on the map Figure 2, A total of 
2,034 waterfowl wars banded as shown in the tabulation bslow: 
Table #, - unary of Birds Banded in Alaska - Summer, 1949 
Species - Gaess No, Bandsd Spsciss - Tucks No, Bended 
Cackling goose 698 Pintail 1,032 
Lesser Canada gooss 1543 Mallard DA 
Black brant 382 Baldpats 3h 
White-frontsd goose 128 Shoyeler te 
EDpsrer goose a Gresno-wingsd 95 
Total Geese ae Greater b#uebill 3 
ee Steller’sa sidar 10 
Spactacisd. sider 9 
Red-breasted morganser 1 
Totsl Ducks — LP, 
specias - Other No, Handed 
Littla brown ¢rans 
PaTasitic jasger Total Gax9s9 
Alaska harmit thrush Total Ducks 
Tuek hawk Tatal, other 
Total, other Grand Total 

1? 
