
7. Klamath Basin (Tule Lake, Clear Lake, and Lower Klamath Refuges). 
Area - 35,000 acres of water and marsh plus surrounding 
agricultural lands. 
a. 
b. 
Cc. 
d. 
Type - Great Basin. 
Coverage - 
Ground and aerial. 
Production summary: 
Estimated Total Nesting Pairs 
Fall Population Indices 
Natural and managed marsh area, 
Species 1952 1953 1954 1955 1952 1953 1954 1955 
C. Goose 640 550 725 430 5,040 4,730 6,770 3,750* 
Mallard 2,270 3,190 4,040 2,860 18,600 20,000 30,670 25,730 
Pintail 440 360 810 350 3,230 2,000 5,090 3,120 
Gadwall 3,200 4,210 3,850 1,960 27,200 45,800 33,530 17,500 
C. Teal 1,210 1,165 1,950 2,530 9,100 8,640 13,990 22,570 
Redhead 2,800 2,900 5,580 3,720 22,100 28,930 47,510 32,540 
Ruddy 1,350 1,500 2,860 2,670 8,600 8,100 21,410 18,230 
Shoveler 760 285 450 260 6,080 1,370 3,340 2,340 
Scaup 150 105 90 110 1,230 620 870 1,040 
Others 120 75 220 10 850 540 1,120 50 





19,850 14,470 
3,900 3,450 

3,900 4,500 
24, 000 
27,300 30,500 16,000 
* Includes 1,250 non-breeders on Clear Lake (aerial count). 
e. Remarks: Breeding Canada geese decreased 41 percent 
and the fall population was down 495 percent. 
Pairs of breeding ducks decreased 27 percent 
while the fall population declined 22 percent. 
Breeding coots showed a decrease of 12 per- 
cent and the fall population was down 48 percent. 
8. State-wide Trend. 
A comparative summary of nesting pairs of waterfowl for the 
- past four seasons together with final fall population including 
young plus resident adults is shown in the following table. 
These figures for each year have been derived from the pre- 
ceding tables. In almost all cases the figures shown for 
‘nesting pairs" are more accurate than those indicating 
"fall population indices," 
