1977-78 1977-80 



1978 



LOGj INDIVIDUALS PER SPECIES 



Figure 19. Year-to-year changes in cumulative May-July species curves for 

 breeding birds encountered on five roadside wildlife survey 

 routes, Circle West study area, 1977-1980. 



20-1 



30- 



40- 



r 50- 



o 



I 



in 60 



70 



80i 



90 



I 00 



1958 1969 1970 1971 1972 1973 197^; 1975 I97G 1977 W75 i97y H;C 



Figure 20. Similarity in percent for 1968-1980 .lune runs of the Circle 

 roadside wildlife survey routes (arrows indicate change in 

 observers) . 



-48- 



