36-1 



3 4 



3.2- 



30- 



o ? 8- 

 2.6 



2 4 



2.2 



20 



-■ Tolol 



- • Circle 



■ ♦ Flowing Well 



■A Missouri River 



□ Prairie Elk 



-» Drcyer Ranch 



\ 



\ 



I 

 1977 



1978 



1 



1979 



Figure 21. Year-to-year changes in June breeding bird community sigma for 

 five roadside wildlife survey routes, Circle West study area. 



70-, 



60 



o 50 

 ui 



o 

 q: 



CO 40 



Z 



Z 



30- 



20- 



/ 



1977 



I 

 1978 



1979 



Figure 22. Year-to-year changes in June breeding bird species number (exclusive 

 of summer visitors and water birds) for five roadside wildlife 

 survey routes. Circle West study area. 



61 



