
Nesting birds on the surrounding agricultural lands in the 
California section of the Klamath Basin were also included 
both in the nesting pairs and production figures. The 
estimates in the present report have been corrected for 1949. 
Estimates of total fall population for this area include many 
resident non-breeding ducks, especially divers. 
Duck production on this area greatly increased in 1950, 
largely due to improved conditions on Lower Klamath Refuge, 
Losses from botulism have been minimal compared to previous 
years, also making for increased effective production. Nesting 
Canada geese showed a sharp decrease from 1949. 
7. State-wide Trend. 
A comparative summary of nesting pairs of waterfowl for this season and 
last season, together with estimated final fall population including young plus resident 
adults, is shown in the following table. These figures for each year have been derived 
from the preceding tables and include only those areas on which comparable census data 
is available for both years, 


' Estimated Total Nesting Pairs Total Fall Population 
Species 1949 1950 ~ 1949 1950 
Canada goose 4,060 3, 250 26, 438 | 22, 300 
Mallard 39, 326 38, 843 202, 100 202, 400. 
Gadwall 6, 323 7,572 41,125 _ 59,350 
Pintail Yr, 921 2,328 9, 675 13, 760 
Cinnamon teal 5,160 5,230 29,900 40, 350 
G-w. teal 200 90 1, 850 it; 160 
B-w. teal 365 395 2, 630 . 3, 240 
Redhead 4,808 5, 540 33, 830 52,500 
Shoveler 1,184 1,197 8, 650 8,910 
Scaup 870 910 6, 400 8, 800 
Ruddy 2, 552 3, 581 20, 550 32,230 
Others 630 696 4, 450 4, 640 
Total 63, 339 66, 342 361, 660. 427, 340 
Coot 6,920 8, 036 39,250 50, 400. 
Remarks: 
Duck production for 1950 shows an increase over 1949 of over 15 percent. 
Increases are recorded in gadwall, pintail, cinnamon teal, redhead and ruddy. Other 
species of ducks remain essentially the same. 
The production of Canada geese for the State shows a decrease from 1949. 
Of 332 Canada geese banded in late June, 1949, at Tule Lake Refuge, a total of 36 bands 
have been returned to date from birds shot by hunters. This is a direct return of over 
ll percent. This year 672 geese were banded at Tule Lake and Lower Klamath Refuges. 
Additional banding next summer and spring counts on breeding populations in the future 
are planned to give a closer check on this population of geese. 
Data from Nesting Studies 
Studies of nesting were carried on in the Sacramento Valley both in 1949 and 
1950 on essentially the same areas. Three separate areas within a 10-mile radius were 
under study in 1949 as follows: re 5 
