108 
Table I shows that the decrease in water areas was not sufficient to reduce 
the breeding population, which was the largest yet recorded for the area. Mallards 
again showed a substantial gain while the number of blue-winged teal and diving ducks 
decreased. The latter may have been due to the lower water levels which left the 
emergent vegetaion surrounded by mud flats. 
Table I. - Breeding Population - Caron Potholes. 

Species 1950 1951 1952 1953 1954 
Blue -winged teal 75 90 143 154 114 
Pintail 35 57 79 71 79 
Shoveler 42 52 34 39 63 
Mallard 31 34 111 154 193 
Gadwall 18 33 40 53 62 
Baldpate 28 24 26 39 oe 
Redhead 2 10 23 24 6 
Lesser scaup 7 8 9 22 16 
Green-winged teal 1 5 14 ) 7 
Canvasback - 4 5 16 4 
Ruddy duck 1 4 6 ; 6 
Cinnamon teal - - - - 1 
Unidentified : a A 4 11 
Total Pairs 240 321 490 591 608 
Per Square Mile 56.3 75.5 Lid. 139.0 143.0 
Brood counts using the "beat out'' method were made on June 26 and 27 and 
August 9 and 10. Results from these counts were combined to give the total broods 
produced as shown in Table Il. Forty-six ponds still contained water when the August 
count was made. 
