Table Il. - Breeding Pair* Census - Redvers Study Area** 

Breeding Pairs Percent 
1952 1953 1954 = 195219531954 
Mallard 265 258 215 44.1 43.6 42.4 
Blue-winged teal 142 150 95 23.6 25.3 18,7 
Pintail 64 55 73 10.6 9.3 14,4 
Baldpate - 32 31 42 5.3 5.2 8.3 
Green-winged teal 32 34 = 330 5.3 aw | 5.9 
Canvasback 23 24 24 3.8 4.0 4.7 
Shoveler 12 13 14 z2.0 Z.2 2.8 
Lesser scaup 15 12 4 os 39 2.0 0.8 
Gadwall 7 6 8 1.2 1.0 1.6 
Ring-necked 4 a 1 0.7 0.7 0.2 
Redhead 4 4 1 0.7 0.7 0.2 
Ruddy duck 2 a a te 0.2 0.2 0.0 
Totals 601 592 507 100.0 100.0 100.0 
* Breeding Pairs = Lone drakes plus pairs. 
** Total Area = 5 square miles. 
Although no significant changes occurred between 1952 and 1953, this was not 
true in 1954. From Table I we find that there were only 232 water areas present in 
May and 252 during the first week of June, 1954 as compared with 306 in 1952 and 
1953. This represented a reduction in number of water areas of from 18 to 24 
percent. Previous breeding pair-water area counts in the Dakotas had indicated a 
definite correlation between number of water areas and breeding pairs and on the 
Redvers Area, a drop of 18 to 24 percent in number of water areas was reflected in 
a drop of 15 percent in breeding pairs. Naturally certain of the species of low 
population density would not be affected by the drop in number of water areas, but 
the two main breeding species, namely--mallard and blue-winged teal--dropped 18 
and 37 percent respectively. Thus the correlation between the number of small 
water areas and breeding pair population in the aspen parkland habitat may be closer 
than heretefore supposed. Also, these data seem to lend credence to the theory 
