Vol• 15, No. 6 
Page 2 
during the preceding 2-week period). This increased pressure was probably 
related to increased hunter success (MWRL 15(5):2), as the leaves were 
falling and squirrels were on the ground foraging for nuts. Hunting 
pressure was low (only 3*8 percent of the total hours afield) during the 
last 2 weeks of the season (November 1-15)• 
Responses of Bobwhites to Habitat Manipulation J. A. Ellis 
Analyses of population and audio-census data for Forbes and Dale for the 
period 1964-72 revealed some interesting relationships. A significant 
correlation existed between the prebreeding populations and the mean numbers 
of calls per stop for Daie (r = +0.850, £<0.05) but not for Forbes 
(r » +0.612, £>0.05). Also, the prebreeding populations on Dale were 
significantly correlated (jP<0.1C) with the prehunt populations. On Forbes, 
the relationship between the prebreeding populations and the prehunt 
populations approached, but did not reach, significance (F * 3*73; ref. 
F s 3*78, 6 df). The population densities of quail on lands surrounding 
the study areas were believed to have influenced the dispersions of the 
populations from the time of the prebreeding censuses to the period of 
the audio-censuses. During the breeding seasons, the numbers of quail on 
the lands surrounding the Dale Area probably approached, if not equaled, 
the numbers of quail on the study area. Movements by quail on and off 
the Dale Area would tend to be equal. At Forbes, movement by bobwhites 
would tend to be away from the study area. 
Responses of Prairie Chickens to H abitat Manipulation R. L. Western}er, 
D* R. Vance 
During the spring of 1572, 301 people visited the prairie chicken 
sanctuaries in Jasper County on a reservation basis. In addition, an 
unknown number of people without reservations visited the sanctuaries. 
Forty-five groups and 29 mornings were involved this spring. Groups 
represented included the following: Earlham College, 57 individuals; 
Illinois Department of Conservation, 13; Northern Illinois University, 11; 
Illinois Audubon Society, 23; Illinois Natural History Survey, 13; Illinois 
State Museum, 2; Goshen College, 8; Illinois State University, 4; Greenville 
College, 8; University High School, 15; Purdue Bird Study Group, 4; Ohio 
Audubon Council, 11; University of Illinois, 23; Eastern Illinois University, 
15; Musselmen Audubon Society, 13; Indiana University, 14; CBS TV News, 1; 
Champaign Centennial High School, 20; Boy Scouts of America, 9; and 37 other 
interested ornithologists, sportsmen, and laymen. Included In these groups 
were visitors from Indiana, Ohio, Tennessee, Maryland, and California. 
Thus, prairie chickens in Illinois continue to provide a unique nature 
experience and an educational opportunity for people throughout the nation 
as well as for the people of the Prairie State. 
