518 



PRODI CTIl IT) OF GROUSE POPULATIONS 



covert had only two nests in 1930, while in later years densities of less than two per 100 

 acres have not been unrommon on this area. 



TABLK 7(1. 



MIMBEH OK FKM\LKS PKH 100 ACHKS* I\ SPUING GROUSF 



POPULA.TION ON CONNECTICUT HILL AND 



ADIRONDACK AREAS— 1930-1912 



* In this table and throughout the following discussions of 

 ilfnsity the data are given in terms of 100 acres of 

 t:riMi9e cover. I'nits of this size are ren<!ilv visualized 

 and by this means large decimals are avi)i<)('d. 



A This area was not worked prior to the winter of 1931*32 

 and sjtring surveys were not conducted after 1938. 



Brood Densities 



Grouse brood densities have been computed directly because complete censuses have been 

 made each summer on the Connecticut Hill and Adirondack study areas (table 77). 



TABLE 77. NUMBER OF GROUSE BROODS PER 100 ACRES ON CONNECTICUT 

 HILL AND ADIRONDACK AREAS— 1930-1912 



* Only a portion of this area was worked in the summer of 

 1933. Supplemental evidence indicates that the brood 

 density for the entire tract averaged only slightly lower 

 titan in 1932. 



As Willi llic alimi(l;iiirc .if ilip species at all seasons, liro.ids have iisualK lieeii iiiarkedly less 

 frequent in the forest hahilat of the northern area. Simihirlv their numbers have fluctuated 

 less from year to year on that Irai I. On three occasions, however, their density on Connecticut 

 ilill has dropped within liie ratine of thai on ihe .Adirondack area, hein;; jusl the same in 1010. 



Individual coverts have often exhibited higher, as well as l.>wer. densities than an) appear- 

 ing in the averages for the area as a whole. Thu> as inan\ as 4.3 broods per 100 acres have 

 been found on one tract of IRS acres while similar units have held onlv one in a number of 

 instances and in 1930 none at all were observed on one of 231 acres. 



