36 n 



3.4 



3.2- 



3 0- 

 < 

 o 28- 



2.6- 



2 4 



2.2 



2.0 



-■ Total 



- • Circle 



• <► Flowing Well 



-▲ Missouri River 



-o Proirie Elk 



-» Oreyer Ronch 



• \ 



■ T' S^".^ -v \ 



/ 



oV ° 



\ 

 \ 



\ 



^A-_ 



1977 



1978 



1979 



1980 



1981 



Figure 11. Year-to-year changes in June breeding bird community 



Sigma for five roadside wildlife survey routes, 

 Circle West study area. 



70- 



60- 



« 



u 



o 50 



UJ 



a. 



0) 



11. 

 o 



oc 



llJ 



CO 40 



3 



30- 



20 



— Total 



— Circle 



• ••Flowing Well 



— Missouri River 



— Prairie Elk 

 — Oreyer Ranch 



A 



° o o- 



•^" ••••*• 



♦ <►•"" 



.(o) 



••♦•• 



1977 



— 1 



1978 



1979 



1980 



1981 



Figure 12. 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. 



-45- 



