5. San Joaquin Valley 
ae 
b. Type - Flooded lake bottoms, river channels and agricultural land. 
Cc. 
d. 
Area - not determined, 
Coverage - Aerial. Variable (10 percent to complete coverage). 
Estimated Total Nesting Pairs: 
143 
Species Spring 1952 Spring 1953 
Mallard 1, 700 2,570 
Gadwall 290 50 
Cinn. Teal. 190 200 
Redhead 70 30 
Pintail 40 190 
Shoveler 10 30 
Ruddy duck 0 140 
Tree duck 20 10 
a yg ee 
Total 2, 320 3,220 
~ Coot 2,600 4,700 
e. Remarks: An increase of 39 percent for ducks and 80 percent 
in coots is indicated. Buena Vista, Hacienda, and Tulare Lakes 
furnish nesting habitat only during wet cycles and cannot be relied 
upon for continued production, 
nesting success or brood size on which to base production. 
above figures are not included in the State-wide totals. 
64 Northeastern California 
a. Area - not determined. 
We have no data on the average 
The 
b. Type- Natural marshes, lakes and artificial impoundments. 
c. Coverage - Aerial, complete 1949, 1950, 1951, 1952 and 1953 
supplemented by ground checks. 
d. Production summary: 
Estimated Total Nesting Pairs 
Total Fall Population 

Species T950 1951 1952 1953. 1950 °#&5:91951 1952 1953 
Canada geese 1,950 2,000 2,560 2,310 12,000 13,350 14,200* 12, 830% 
Mallard 2,650 4,460 7,120 5,430 10,500 23,540 50,980 32,620 
Gadwall 1,660 1,470 820 710 9,000 9,250 6,810 4,710 
 Pintail 1,750 1,970 2,440 1,130 6,800 7,190 16,230 6,380 
G-w. Teal 10 30 40 10 60 140 200 50 
B-w. Teal 15 20 20 ‘20 680 110 120 100 
Cinn, Teal 2,360 1,150 770 630 14,000 5,400 4,840 4,130 
Shoveler 670 235 250 140 2,900 1,500 1,880 630 
Redhead 520 875 430 700 3,000 4,770 2,410 5,200 
Scaup | 60 150 140 130 400 880 1,010 1,040 
Ruddy duck 275 290 100 190 1,800 1,500 440 1,260 
Others 250 320 90 200 1,200 1,740 480 1,080 
Total (duck)10,220 10,970 12,220 
Coot 1,450 1,710 
1,650 
9,290 50,340 56,020 85,400 57,200 
3,620 
7, 400 
12, 800 
9,770 21,050 
* Includes 3, 260 non-breeding birds in 1952, and 2, 950 non-breeders in 1953. 
