e. Remarks: 
35 percent decrease. Nesting pairs in 1949 were 4.6 percent of the 
State total. Based on this sample the decrease in nesting mallards 
appears significant for this local area. 
3, North San Francisco Bay 
a. Area - 36 square miles 1949; 30 square miles 1950. 
b. Type - Tidal saltmarsh, gun clubs, river delta and pasture land. 
c. Coverage - Aerial 12 1/2 percent 1949, 10 percent 1950. 
d. Production Summary: 
Estimated Total Nesting Pairs Total Fall Population 


Species 1949 1950 1949 1950. 
Mallard 575 806 2,800 — 4,000 - 
Gadwall 40 56 200 300 
Pintail 5 9 “ 25 50 
Shoveler 10 9 * 50 ; 50 
Ruddy 0 74 0 : 350 
Total 630 954 3,075 4, 750 
-e@, Remarks: : 
35 percent increase. Nesting paris in 1949 were only 0.7 percent of the 
State total. Based on this sample, this increase appears significant for 
this local area but unimportant on a State-wide basis, 
4, North San Joaquin Valley (Grasslands) 
a. Area - 150 square miles. 
b. Type ~- Gun clubs and flooded pasture lands. 
c. Coverage - Aerial 25 percent 1948, 1949, and 1950. 
d. Production Summary: 
Estimated Total Nesting Pairs Total Fall Population 
Species 1948 1949 1950 1949 1950 
Mallard 712 1,216 1,304 5, 400 6, 600 
Gadwall 176 156 - 56 675 300 
Pintail 8 16 24 75 150 
Shoveler 10 24 8 . 100 60 
Redhead 44 28 z0 130 100 
Fulvous tree duck 6 0 6 --- 40 
Ruddy dk 12 32 50 : 180 
Cinnamon teal 140 192 16 ; 950 500 
gy a es SSS SS PP SS 
rt he a EE en 
Total 1,100 1, 644 1, 526 7, 380 7,930 
Coot ae 200 - 400 . 446 . 1,600 z, 000 
e. Remarks: 
7 percent decrease in nesting pairs off-set by. increased brood 
survival and nest success resulting in slight over-all increased 
production, Nesting pairs in 1949 were 2 percent of the State total. 
5. Northeastern California 
a. Area - not determined. 
b, Type - natural marshes, lakes, and artificial impoundments. 
c. Coverage - Aerial, complete 1949 and 1950. 
