50-1 



45- 



40- 



35- 



30- 



fe"- 



to 20 



S 



15- 



10- 



Number of Number of 



Reqislrotions Species 



All water eiRDS • • o o 



ANATIDAE ONLY A A ■ ■ 



r250 



■200 



150 2 



o 



UJ 



cc 



100 



m 



S 



3 



- 50 



— I 



1977 



1978 



1979 



1980 



Figure 15. Year-to-year changes in numbers of species and numbers of 

 registrations of water birds recorded on June runs of five 

 roadside wildlife survey routes. Circle West study area. 



— Total 



— Circle 



•■■ Flowing Well 



— Missouri River 

 -— Proirie Elk 

 — Dreyer Ronch 



1977 



1978 



1979 



1980 



Figure 16. Year-to-year changes in June breeding bird species richness for 

 five roadside wildlife survey routes. Circle West studv area. 



-43- 



