60 



50 



£40- 



30 



20 



10 



■ Total 



• Circle 



«■ Flowing Well 



A Missouri River 



□ Prairie Elk 



* Dreyer Ranch 



JAN FFB MAR APR MAY JUNE JULY ADG 



iEPT 



DEC 



Figure 40. Monthly changes in bird species number (S) for 1977 runs of 

 five roadside wildlife survey routes. 



1400- 



1300- 

 1200- 

 1100- 

 1000- 



„ 900- 



z 



•S 800- 



1 700 

 ■o 



'> 



- 600- 



O 



o 



*" 500 

 400 

 300 

 200 

 100 



• Circle 



■»• Flowing Well 



A Missouri River 



Q Prairie Elk 



• Dreyer Ranch 



/ / 

 /' / 



,'' ' 



*/ 



^\ 



^... 



/// 



-,_.\--D /•/ 



• a' ' .» 

 ■«•■■' 



\ 



\.\ 



-♦• 



JAN 



FEB 



MAR 



APR 



1 1 1 1 



JUNE JULY AUG SEPT OCT 



DEC 



Figure 41. Monthly changes in total numbers of individual birds (N) for 

 1977 runs of five roadside wildlife survey routes. 



160 



