"1(. 



METHODS A\D TECHNIQUES 



available. During the fall and winter, however, territories have been most difTuult to reeognize. 

 At this season considerable movement by the birds has taken place and estimates ha\e often 

 had to be based primarily on the best one out of three or four workings, supplemented 1)\ in- 

 formation from the others. These estimates were usually somewhat lower than the actual pop- 

 ulation since there was no way of determining whether a bird, flushed during one working, 

 was missed during a previous or subsequent working. 



Trapping and Marking Grouse 



The need for specific information regarding the daily and seasonal range of grouse in- 

 dicated the desirability of marking as many birds as possible and in such a way that they 

 could be easily recognized when contacted in the field. 



The first jiroblem was to trap the birds. Two methods were tried out. one during the winter 

 and the other during the spring nesting season. 



\MNTKlt (.KOISK TUVPPINC SETUP SHOWING (UPPER) SHELTER >MTH BAKE (.litU Ml iiKNKATII AM) 

 (lower) wire cage TRAP WITH CM'TIRED RIRD 



