Table IX. = Density of Emergent Vegetation 
Areas Open * vlosed Total 
II 46 12 58 
III 46 150 196 
Iv 77 127 204 
«x 2/3 or more open water. 
The Breeding Population 
Except on Area I, at least 5 separate counts of breeding birds were made through 
May and June. As may be seen in Tables X to XIII considerable variations occurred 
in individual species populations throughout these two months. In all cases, populations 
rose slightly in early June as renesting efforts began. Because of the delay of about 
2 weeks in the nest season, the preeding population had not settled down until about 
mid-May. Thus, for purposes of making comparisons of populations the following 
figures are taken as the resident breeding pair population on each study area: Areal, 
taken on May 5, 42.7 pairs per square mile; Area II, taken on May 29, 100.2 pairs 
per square mile; Area III, taken on May 26, 98.8 pairs per Square mile; and Area lV, 
taken on May 19, 78.5 pairs per square mile. In the case of Areas II, [Il and IV, the 
arrival of the blue-winged teal marked the stabilization of the breeding population. 
Breeding Populations - All Study Areas 

Table X. - Areal - 4.875 Square Miles 
Date Total Pairs Lone Lone Ind, Ducks / Pairs / Ind. Pop. / 
Ducks _ Males Females Pop. sq. mi. Sq. mi. Sq. mi. 
May 
6 306 98 110 ~ 416 62.8 42.7 85.3 
Table XI. - Area II - 3.125 Square Miles 


Total Lone Lone Ind. Ducks / Pairs / Ind. Pop. / 
Date Ducks Pairs Males Females Pop. sq. mi. Sq. mi. Sq. mile 
5/9 355 125 105 460 113.6 73.6 147.2 
5/15 321 98 125 - 446 102.7 71.4 142.7 
5Y29 423 110 203 - 626 135.4 100.2 200.3 
6/5 433 114, 205 - 638 138.6 102.1 204.2 
6/15 328 76 176 - 506 105.0 80.6 161.9 
