54 
are added to the "Total Pairs" in the following Table, it brings the June count to 
_ within 49 of the May count. During the May coverage it was evident that most of 
the ducks were settled down on breeding territory and for the purposes of this 
report the breeding pair count from the May 10-20 coverage will be used as the 
breeding population. 
Table III - Breeding Pair Census - Redvers Study Area 
Total Pairs 
Species Males Pairs (Males plus Pairs) Differ- 
lst Run 2nd Run Ist Run 2nd Run Ist Run 2nd Run ence 

Mallard 195 106 70 78 265 184 - 81 
B-w. teal 36 95 . 106 67 142 162 + 20 
Pintail 49 23 15 8 64 31 - 33 
Baldpate 4 17 28 18 32 35 + 3 
G-w. teal 14 27 18 16 32 43 + ll 
Canvasback 9 l 14 9 23 10 - 13 
Lesser scaup. 3 3 12 9 15 12 -~ 3 
Shoveler 1- 7 11 4 12 11 - 1 
Gadwall - 3 7 10 7 13 + 6 
Ring-necked duck - 3 4 Z 4 5 + 1 
Redhead 1 - 3 2 4 2 - 2 
Ruddy duck - 1 I - 1 1 - 
Totals 312 286 289 223 601 509 - 92 
Table IV - Population per Square Mile and Species Composition - May 10-20 

Total Ducks * Total Pairs * * Total * * * Species 
Population Composition 
Species mee ok 
PER SQUARE MILE ( Percent) 
Mallard 67.0 53.0 106.0 44.1 
B-w. teal 49.6 28.4 56.8 23.6 
Pintail 15.8 12.8 25.6 10.6 
Baldpate 12.0 6.4 12.8 5.3 
G-w. teal 10.0 6.4 12.8 5.3 
Canvasback 7.4 4.6 9.2 3.8 
Lesser scaup 5.4 3.0 6.0 2.5 
Shoveler 4.6 2.4 4.8 z2.0 
Gadwall z2.8 1.4 2.8 1.2 
Ring-necked duck 1.6 0.8 1,6 0.7 
Redhead 1.4 0.8 1.6 0.7 
Ruddy duck 0.4 0.2 0.4 0.2 
Total 178.0 120.2 240.4 100.0 
* Ducks actually counted. 
** Pairs counted plus lone drakes. 
*x**x Pairs plus lone ducks multiplied by two. 
**¥** Species composition for Columns 2 and 3. 
